Commit Graph

9979 Commits

Author SHA1 Message Date
Jiri Olsa
490c8cc949 perf script: Add --show-bpf-events to show eBPF related events
Add the --show-bpf-events command line option to show the eBPF related events:

  PERF_RECORD_KSYMBOL
  PERF_RECORD_BPF_EVENT

Usage:

  # perf record -a
  ...
  # perf script --show-bpf-events
  ...
  swapper     0 [000]     0.000000: PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0ef971d len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
  swapper     0 [000]     0.000000: PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 36
  ...

Committer testing:

  # perf script --show-bpf-events | egrep -i 'PERF_RECORD_(BPF|KSY)'
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc029a6c3 len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 47
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc029c1ae len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 48
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc02ddd1c len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 49
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc02dfc11 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 50
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc045da0a len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 51
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc04ef4b4 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 52
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc09e15da len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 53
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0d2b1a3 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 54
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0fd9850 len 381 type 1 flags 0x0 name bpf_prog_819967866022f1e1_sys_enter
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 179
    0 PERF_RECORD_KSYMBOL ksymbol event with addr ffffffffc0feb1ec len 191 type 1 flags 0x0 name bpf_prog_c1bd85c092d6e4aa_sys_exit
    0 PERF_RECORD_BPF_EVENT bpf event with type 1, flags 0, id 180
  ^C[root@quaco pt]# perf evlist
  intel_pt//ku
  dummy:u
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
4f600bcf65 perf tests: Add map_groups__merge_in test
Add map_groups__merge_in test to test the map_groups__merge_in function
usage - merging kcore maps into existing eBPF maps.

Committer testing:

  # perf test merge
  59: map_groups__merge_in                                  : Ok
  # perf test -v merge
  59: map_groups__merge_in                                  :
  --- start ---
  test child forked, pid 8349
  test child finished with 0
  ---- end ----
  map_groups__merge_in: Ok
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
1c4924220c perf script: Pad DSO name for --call-trace
Pad the DSO name in --call-trace so we don't have the indent screwed by
different DSO name lengths, as now for kernel there's also BPF code
displayed.

  # perf-with-kcore record pt -e intel_pt//ku -- sleep 1
  # perf-core/perf-with-kcore script pt --call-trace

Before:

   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms])                      kretprobe_perf_func
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms])                          trace_call_bpf
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms])                              __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms])                                  __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_get_current_pid_tgid
   sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_ktime_get_ns
   sleep 3660 [16] 57036.806464725: ([kernel.kallsyms])                                          __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464725: ([kernel.kallsyms])                                              __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         __htab_map_lookup_elem
   sleep 3660 [16] 57036.806465366: ([kernel.kallsyms])                                          memcmp
   sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_probe_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                          probe_kernel_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                              __check_object_size
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                                  check_stack_object
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                              copy_user_enhanced_fast_string
   sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_probe_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                          probe_kernel_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                              __check_object_size
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                                  check_stack_object
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms])                                              copy_user_enhanced_fast_string
   sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_get_current_uid_gid
   sleep 3660 [16] 57036.806466008: ([kernel.kallsyms])                                          from_kgid
   sleep 3660 [16] 57036.806466008: ([kernel.kallsyms])                                          from_kuid
   sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return)                                         bpf_perf_event_output
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms])                                          perf_event_output
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms])                                              perf_prepare_sample
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms])                                                  perf_misc_flags
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms])                                                      __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms])                                                          __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806466328: ([kvm])                                                      kvm_is_in_guest
   sleep 3660 [16] 57036.806466649: ([kernel.kallsyms])                                                  __perf_event_header__init_id.isra.0
   sleep 3660 [16] 57036.806466649: ([kernel.kallsyms])                                              perf_output_begin

After:

   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]                      )     kretprobe_perf_func
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]                      )         trace_call_bpf
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]                      )             __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]                      )                 __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_get_current_pid_tgid
   sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_ktime_get_ns
   sleep 3660 [16] 57036.806464725: ([kernel.kallsyms]                      )                         __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806464725: ([kernel.kallsyms]                      )                             __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     __htab_map_lookup_elem
   sleep 3660 [16] 57036.806465366: ([kernel.kallsyms]                      )                         memcmp
   sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_probe_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                         probe_kernel_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                             __check_object_size
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                                 check_stack_object
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                             copy_user_enhanced_fast_string
   sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_probe_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                         probe_kernel_read
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                             __check_object_size
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                                 check_stack_object
   sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]                      )                             copy_user_enhanced_fast_string
   sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_get_current_uid_gid
   sleep 3660 [16] 57036.806466008: ([kernel.kallsyms]                      )                         from_kgid
   sleep 3660 [16] 57036.806466008: ([kernel.kallsyms]                      )                         from_kuid
   sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return )                     bpf_perf_event_output
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]                      )                         perf_event_output
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]                      )                             perf_prepare_sample
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]                      )                                 perf_misc_flags
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]                      )                                     __x86_indirect_thunk_rax
   sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]                      )                                         __x86_indirect_thunk_rax

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
6c398d723a perf dso: Add BPF DSO read and size hooks
Add BPF related code into DSO reading paths to return size (bpf_size)
and read the BPF code (bpf_read).

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-5-jolsa@kernel.org
[ Use uintptr_t when casting from u64 to u8 pointers ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
cacddfe7b0 perf dso: Simplify dso_cache__read function
There's no need for the while loop now, also we can connect two (ret >
0) condition legs together.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
ea5db1bd5a perf dso: Separate generic code in dso_cache__read
Move the file specific code in the dso_cache__read function to a
separate file_read function. I'll add BPF specific code in the following
patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:44 -03:00
Jiri Olsa
5523769ee1 perf dso: Separate generic code in dso__data_file_size()
Moving file specific code in dso__data_file_size function into separate
file_size function. I'll add bpf specific code in following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Namhyung Kim
7cb10a08df perf tools: Remove const from thread read accessors
The namespaces and comm fields of a thread are protected by rwsem and
require write access for it.  So it ended up using a cast to remove
the const qualifier.  Let's get rid of the const then.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Link: http://lkml.kernel.org/r/20190527061149.168640-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Namhyung Kim
a0c0a4ac02 perf top: Add --namespaces option
Since 'perf record' already have this option, let's have it for 'perf top'
as well.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Link: http://lkml.kernel.org/r/20190522053250.207156-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
a9a187a749 perf trace: Beautify 'sync_file_range' arguments
Use existing beautifiers for the first arg, fd, assigned using the
heuristic that looks for syscall arg names and associates SCA_FD with
'fd' named argumes, and wire up the recently introduced sync_file_range
flags table generator.

Now it should be possible to just use:

   perf trace -e sync_file_range

As root and see all sync_file_range syscalls with its args beautified.

  Doing a syscall strace like session looking for this syscall, then run
  postgresql's initdb command:

  # perf trace -e sync_file_range
  <SNIP>
  initdb/1332 sync_file_range(6</var/lib/pgsql/data/global/1260_fsm>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(6</var/lib/pgsql/data/global/1260_fsm>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(7</var/lib/pgsql/data/base/1/2682>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(6</var/lib/pgsql/data/global/1260_fsm>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(7</var/lib/pgsql/data/base/1/2682>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(6</var/lib/pgsql/data/global/1260_fsm>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(5</var/lib/pgsql/data/global>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(4</var/lib/pgsql/data>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  initdb/1332 sync_file_range(4</var/lib/pgsql/data>, 0, 0, SYNC_FILE_RANGE_WRITE) = 0
  ^C
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-8tqy34xhpg8gwnaiv74xy93w@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
8ef6d74e1d perf beauty: Add generator for sync_file_range's 'flags' arg values
$ tools/perf/trace/beauty/sync_file_range.sh
  static const char *sync_file_range_flags[] = {
          [ilog2(1) + 1] = "WAIT_BEFORE",
          [ilog2(2) + 1] = "WRITE",
          [ilog2(4) + 1] = "WAIT_AFTER",
  };
  $

When all are the above are present, then we have something called
SYNC_FILE_RANGE_WRITE_AND_WAIT, that will be special cased in the
upcoming scnprintf beautifier for this flags arg.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-uf2vd7bc8fkz65j7yit8dh84@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
ee364dcdcd perf trace beauty clone: Handle CLONE_PIDFD
In addition to the older flags. This will allow something like this to
be implemented in 'perf trace"

  perf trace -e clone/PIDFD in flags/

I.e. ask for strace like tracing, system wide, looking for 'clone'
syscalls that have the CLONE_PIDFD bit set in the 'flags' arg.

For now we'll just see PIDFD if it is set in the 'flags' arg.

Cc: Christian Brauner <christian@brauner.io>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-drq9h7s8gcv8b87064fp6lb0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
f6af095668 perf trace: Beautify 'fsmount' arguments
Use existing beautifiers for the first arg, fd, assigned using the
heuristic that looks for syscall arg names and associates SCA_FD with
'fd' named argumes, and wire up the recently introduced fsmount
attr_flags table generator.

Now it should be possible to just use:

   perf trace -e fsmount

As root and see all fsmount syscalls with its args beautified.

  # cat sys_fsmount.c
  #define _GNU_SOURCE        /* See feature_test_macros(7) */
  #include <unistd.h>
  #include <sys/syscall.h>   /* For SYS_xxx definitions */

  #define __NR_fsmount 432

  #define MOUNT_ATTR_RDONLY	 0x00000001 /* Mount read-only */
  #define MOUNT_ATTR_NOSUID	 0x00000002 /* Ignore suid and sgid bits */
  #define MOUNT_ATTR_NODEV	 0x00000004 /* Disallow access to device special files */
  #define MOUNT_ATTR_NOEXEC	 0x00000008 /* Disallow program execution */
  #define MOUNT_ATTR__ATIME	 0x00000070 /* Setting on how atime should be updated */
  #define MOUNT_ATTR_RELATIME	 0x00000000 /* - Update atime relative to mtime/ctime. */
  #define MOUNT_ATTR_NOATIME	 0x00000010 /* - Do not update access times. */
  #define MOUNT_ATTR_STRICTATIME 0x00000020 /* - Always perform atime updates */
  #define MOUNT_ATTR_NODIRATIME	 0x00000080 /* Do not update directory access times */

  static inline int sys_fsmount(int fs_fd, int flags, int attr_flags)
  {
  	syscall(__NR_fsmount, fs_fd, flags, attr_flags);
  }

  int main(int argc, char *argv[])
  {
  	int attr_flags = 0, fs_fd = 0;

  	sys_fsmount(fs_fd++, 0, attr_flags);
  	attr_flags |= MOUNT_ATTR_RDONLY;
  	sys_fsmount(fs_fd++, 1, attr_flags);
  	attr_flags |= MOUNT_ATTR_NOSUID;
  	sys_fsmount(fs_fd++, 0, attr_flags);
  	attr_flags |= MOUNT_ATTR_NODEV;
  	sys_fsmount(fs_fd++, 1, attr_flags);
  	attr_flags |= MOUNT_ATTR_NOEXEC;
  	sys_fsmount(fs_fd++, 0, attr_flags);
  	attr_flags |= MOUNT_ATTR_NOATIME;
  	sys_fsmount(fs_fd++, 1, attr_flags);
  	attr_flags |= MOUNT_ATTR_STRICTATIME;
  	sys_fsmount(fs_fd++, 0, attr_flags);
  	attr_flags |= MOUNT_ATTR_NODIRATIME;
  	sys_fsmount(fs_fd++, 0, attr_flags);
  	return 0;
  }
  #
  # perf trace -e fsmount ./sys_fsmount
  fsmount(0, 0, MOUNT_ATTR_RELATIME)      = -1 EINVAL (Invalid argument)
  fsmount(1, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_RELATIME) = -1 EINVAL (Invalid argument)
  fsmount(2, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_RELATIME) = -1 EINVAL (Invalid argument)
  fsmount(3, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_RELATIME) = -1 EBADF (Bad file descriptor)
  fsmount(4, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_RELATIME) = -1 EBADF (Bad file descriptor)
  fsmount(5, FSMOUNT_CLOEXEC, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME) = -1 EBADF (Bad file descriptor)
  fsmount(6, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME|MOUNT_ATTR_STRICTATIME) = -1 EINVAL (Invalid argument)
  fsmount(7, 0, MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV|MOUNT_ATTR_NOEXEC|MOUNT_ATTR_NOATIME|MOUNT_ATTR_STRICTATIME|MOUNT_ATTR_NODIRATIME) = -1 EINVAL (Invalid argument)
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-w71uge0sfo6ns9uclhwtthca@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
f5b91dbba1 perf trace: Introduce syscall_arg__scnprintf_strarray_flags
So that one can just define a strarray and process it as a set of flags,
similar to syscall_arg__scnprintf_strarray() with plain arrays.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-nnt25wkpkow2w0yefhi6sb7q@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
3637c64731 perf beauty: Add generator for fsmount's 'attr_flags' arg values
$ tools/perf/trace/beauty/fsmount.sh
  static const char *fsmount_attr_flags[] = {
          [ilog2(0x00000001) + 1] = "RDONLY",
          [ilog2(0x00000002) + 1] = "NOSUID",
          [ilog2(0x00000004) + 1] = "NODEV",
          [ilog2(0x00000008) + 1] = "NOEXEC",
          [ilog2(0x00000010) + 1] = "NOATIME",
          [ilog2(0x00000020) + 1] = "STRICTATIME",
          [ilog2(0x00000080) + 1] = "NODIRATIME",
  }

MOUNT_ATTR__ATIME and MOUNT_ATTR_RELATIME will be special cased in the
fsmount__scnprintf_flags() beautifier.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-sl24d7m2ge82mfmrbaf1mb0s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
dcc6fd64f2 perf trace: Beautify 'fsconfig' arguments
Use existing beautifiers for the first arg, fd, assigned using the
heuristic that looks for syscall arg names and associates SCA_FD with
'fd' named argumes, and wire up the recently introduced fsconfig cmd
table generator.

Now it should be possible to just use:

   perf trace -e fsconfig

As root and see all fsconfig syscalls with its args beautified, more
work needed to look at the command and according to it handle the 'key',
'value' and 'aux' args, using the 'fcntl' and 'futex' beautifiers as a
starting point to see how to suppress sets of these last three args that
may not be used by the 'cmd' arg, etc.

  # cat sys_fsconfig.c
  #define _GNU_SOURCE         /* See feature_test_macros(7) */
  #include <unistd.h>
  #include <sys/syscall.h>   /* For SYS_xxx definitions */
  #include <fcntl.h>

  #define __NR_fsconfig 431

  enum fsconfig_command {
  	FSCONFIG_SET_FLAG	= 0,	/* Set parameter, supplying no value */
  	FSCONFIG_SET_STRING	= 1,	/* Set parameter, supplying a string value */
  	FSCONFIG_SET_BINARY	= 2,	/* Set parameter, supplying a binary blob value */
  	FSCONFIG_SET_PATH	= 3,	/* Set parameter, supplying an object by path */
  	FSCONFIG_SET_PATH_EMPTY	= 4,	/* Set parameter, supplying an object by (empty) path */
  	FSCONFIG_SET_FD		= 5,	/* Set parameter, supplying an object by fd */
  	FSCONFIG_CMD_CREATE	= 6,	/* Invoke superblock creation */
  	FSCONFIG_CMD_RECONFIGURE = 7,	/* Invoke superblock reconfiguration */
  };

  static inline int sys_fsconfig(int fd, int cmd, const char *key, const void *value, int aux)
  {
  	syscall(__NR_fsconfig, fd, cmd, key, value, aux);
  }

  int main(int argc, char *argv[])
  {
  	int fd = 0, aux = 0;

  	open("/foo", 0);
  	sys_fsconfig(fd++, FSCONFIG_SET_FLAG,	     "/foo1", "/bar1", aux++);
  	sys_fsconfig(fd++, FSCONFIG_SET_STRING,	     "/foo2", "/bar2", aux++);
  	sys_fsconfig(fd++, FSCONFIG_SET_BINARY,	     "/foo3", "/bar3", aux++);
  	sys_fsconfig(fd++, FSCONFIG_SET_PATH,	     "/foo4", "/bar4", aux++);
  	sys_fsconfig(fd++, FSCONFIG_SET_PATH_EMPTY,  "/foo5", "/bar5", aux++);
  	sys_fsconfig(fd++, FSCONFIG_SET_FD,	     "/foo6", "/bar6", aux++);
  	sys_fsconfig(fd++, FSCONFIG_CMD_CREATE,	     "/foo7", "/bar7", aux++);
  	sys_fsconfig(fd++, FSCONFIG_CMD_RECONFIGURE, "/foo8", "/bar8", aux++);
  	return 0;
  }
  # trace -e fsconfig ./sys_fsconfig
  fsconfig(0, FSCONFIG_SET_FLAG, 0x40201b, 0x402015, 0) = -1 EINVAL (Invalid argument)
  fsconfig(1, FSCONFIG_SET_STRING, 0x402027, 0x402021, 1) = -1 EINVAL (Invalid argument)
  fsconfig(2, FSCONFIG_SET_BINARY, 0x402033, 0x40202d, 2) = -1 EINVAL (Invalid argument)
  fsconfig(3, FSCONFIG_SET_PATH, 0x40203f, 0x402039, 3) = -1 EBADF (Bad file descriptor)
  fsconfig(4, FSCONFIG_SET_PATH_EMPTY, 0x40204b, 0x402045, 4) = -1 EBADF (Bad file descriptor)
  fsconfig(5, FSCONFIG_SET_FD, 0x402057, 0x402051, 5) = -1 EINVAL (Invalid argument)
  fsconfig(6, FSCONFIG_CMD_CREATE, 0x402063, 0x40205d, 6) = -1 EINVAL (Invalid argument)
  fsconfig(7, FSCONFIG_CMD_RECONFIGURE, 0x40206f, 0x402069, 7) = -1 EINVAL (Invalid argument)
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-fb04b76cm59zfuv1wzu40uxy@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
d35293004a perf beauty: Add generator for fsconfig's 'cmd' arg values
$ tools/perf/trace/beauty/fsconfig.sh
  static const char *fsconfig_cmds[] = {
          [0] = "SET_FLAG",
          [1] = "SET_STRING",
          [2] = "SET_BINARY",
          [3] = "SET_PATH",
          [4] = "SET_PATH_EMPTY",
          [5] = "SET_FD",
          [6] = "CMD_CREATE",
          [7] = "CMD_RECONFIGURE",
  };
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-u721396rkqmawmt91dwwsntu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:43 -03:00
Arnaldo Carvalho de Melo
693bd3949b perf trace: Beautify 'fspick' arguments
Use existing beautifiers for the first 2 args (dfd, path) and wire up
the recently introduced fspick flags table generator.

Now it should be possible to just use:

   perf trace -e fspick

As root and see all move_mount syscalls with its args beautified, either
using the vfs_getname perf probe method or using the
augmented_raw_syscalls.c eBPF helper to get the pathnames, the other
args should work in all cases, i.e. all that is needed can be obtained
directly from the raw_syscalls:sys_enter tracepoint args.

  # cat sys_fspick.c
  #define _GNU_SOURCE        /* See feature_test_macros(7) */
  #include <unistd.h>
  #include <sys/syscall.h>   /* For SYS_xxx definitions */
  #include <fcntl.h>

  #define __NR_fspick 433

  #define FSPICK_CLOEXEC          0x00000001
  #define FSPICK_SYMLINK_NOFOLLOW 0x00000002
  #define FSPICK_NO_AUTOMOUNT     0x00000004
  #define FSPICK_EMPTY_PATH       0x00000008

  static inline int sys_fspick(int fd, const char *path, int flags)
  {
  	syscall(__NR_fspick, fd, path, flags);
  }

  int main(int argc, char *argv[])
  {
  	int flags = 0, fd = 0;

  	open("/foo", 0);
  	sys_fspick(fd++, "/foo1", flags);
  	flags |= FSPICK_CLOEXEC;
  	sys_fspick(fd++, "/foo2", flags);
  	flags |= FSPICK_SYMLINK_NOFOLLOW;
  	sys_fspick(fd++, "/foo3", flags);
  	flags |= FSPICK_NO_AUTOMOUNT;
  	sys_fspick(fd++, "/foo4", flags);
  	flags |= FSPICK_EMPTY_PATH;
  	return sys_fspick(fd++, "/foo5", flags);
  }
  # perf trace -e fspick ./sys_fspick
  LLVM: dumping /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o
  fspick(0, "/foo1", 0)                   = -1 ENOENT (No such file or directory)
  fspick(1, "/foo2", FSPICK_CLOEXEC)      = -1 ENOENT (No such file or directory)
  fspick(2, "/foo3", FSPICK_CLOEXEC|FSPICK_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory)
  fspick(3, "/foo4", FSPICK_CLOEXEC|FSPICK_SYMLINK_NOFOLLOW|FSPICK_NO_AUTOMOUNT) = -1 ENOENT (No such file or directory)
  fspick(4, "/foo5", FSPICK_CLOEXEC|FSPICK_SYMLINK_NOFOLLOW|FSPICK_NO_AUTOMOUNT|FSPICK_EMPTY_PATH) = -1 ENOENT (No such file or directory)
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-erau5xjtt8wvgnhvdbchstuk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Arnaldo Carvalho de Melo
a1c729a5f6 perf beauty: Add generator for fspick's 'flags' arg values
$ tools/perf/trace/beauty/fspick.sh
  static const char *fspick_flags[] = {
          [ilog2(0x00000001) + 1] = "CLOEXEC",
          [ilog2(0x00000002) + 1] = "SYMLINK_NOFOLLOW",
          [ilog2(0x00000004) + 1] = "NO_AUTOMOUNT",
          [ilog2(0x00000008) + 1] = "EMPTY_PATH",
  };
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-8i16btocq1ax2u6542ya79t5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Arnaldo Carvalho de Melo
566e30229e perf trace: Beautify 'move_mount' arguments
Use existing beautifiers for the first 4 args (to/from fds, pathnames)
and wire up the recently introduced move_mount flags table generator.

Now it should be possible to just use:

      perf trace -e move_mount

As root and see all move_mount syscalls with its args beautified, except
for the filenames, that need work in the augmented_raw_syscalls.c eBPF
helper to pass more than one, see comment in the
augmented_raw_syscalls.c source code, the other args should work in all
cases, i.e. all that is needed can be obtained directly from the
raw_syscalls:sys_enter tracepoint args.

Running without the strace "skin" (.perfconfig setting output formatting
switches to look like strace output + BPF to collect strings, as we
still need to support collecting multiple string args for the same
syscall, like with move_mount):

  # cat sys_move_mount.c
  #define _GNU_SOURCE         /* See feature_test_macros(7) */
  #include <unistd.h>
  #include <sys/syscall.h>   /* For SYS_xxx definitions */

  #define __NR_move_mount 429

  #define MOVE_MOUNT_F_SYMLINKS		0x00000001 /* Follow symlinks on from path */
  #define MOVE_MOUNT_F_AUTOMOUNTS		0x00000002 /* Follow automounts on from path */
  #define MOVE_MOUNT_F_EMPTY_PATH		0x00000004 /* Empty from path permitted */
  #define MOVE_MOUNT_T_SYMLINKS		0x00000010 /* Follow symlinks on to path */
  #define MOVE_MOUNT_T_AUTOMOUNTS		0x00000020 /* Follow automounts on to path */
  #define MOVE_MOUNT_T_EMPTY_PATH		0x00000040 /* Empty to path permitted */

  static inline int sys_move_mount(int from_fd, const char *from_pathname,
  				 int to_fd, const char *to_pathname,
  				 int flags)
  {
  	  syscall(__NR_move_mount, from_fd, from_pathname, to_fd, to_pathname, flags);
  }

  int main(int argc, char *argv[])
  {
  	  int flags = 0, from_fd = 0, to_fd = 100;

  	  sys_move_mount(from_fd++, "/foo", to_fd++, "bar", flags);
  	  flags |= MOVE_MOUNT_F_SYMLINKS;
  	  sys_move_mount(from_fd++, "/foo1", to_fd++, "bar1", flags);
          flags |= MOVE_MOUNT_F_AUTOMOUNTS;
  	  sys_move_mount(from_fd++, "/foo2", to_fd++, "bar2", flags);
          flags |= MOVE_MOUNT_F_EMPTY_PATH;
  	  sys_move_mount(from_fd++, "/foo3", to_fd++, "bar3", flags);
          flags |= MOVE_MOUNT_T_SYMLINKS;
  	  sys_move_mount(from_fd++, "/foo4", to_fd++, "bar4", flags);
          flags |= MOVE_MOUNT_T_AUTOMOUNTS;
  	  sys_move_mount(from_fd++, "/foo5", to_fd++, "bar5", flags);
          flags |= MOVE_MOUNT_T_EMPTY_PATH;
  	  return sys_move_mount(from_fd++, "/foo6", to_fd++, "bar6", flags);
  }
  # mv ~/.perfconfig  ~/.perfconfig.OFF
  # perf trace -e move_mount ./sys_move_mount
       0.000 ( 0.009 ms): sys_move_mount/28971 move_mount(from_pathname: 0x402010, to_dfd: 100, to_pathname: 0x402015) = -1 ENOENT (No such file or directory)
       0.011 ( 0.003 ms): sys_move_mount/28971 move_mount(from_dfd: 1, from_pathname: 0x40201e, to_dfd: 101, to_pathname: 0x402019, flags: F_SYMLINKS) = -1 ENOENT (No such file or directory)
       0.016 ( 0.002 ms): sys_move_mount/28971 move_mount(from_dfd: 2, from_pathname: 0x402029, to_dfd: 102, to_pathname: 0x402024, flags: F_SYMLINKS|F_AUTOMOUNTS) = -1 ENOENT (No such file or directory)
       0.020 ( 0.002 ms): sys_move_mount/28971 move_mount(from_dfd: 3, from_pathname: 0x402034, to_dfd: 103, to_pathname: 0x40202f, flags: F_SYMLINKS|F_AUTOMOUNTS|F_EMPTY_PATH) = -1 ENOENT (No such file or directory)
       0.023 ( 0.002 ms): sys_move_mount/28971 move_mount(from_dfd: 4, from_pathname: 0x40203f, to_dfd: 104, to_pathname: 0x40203a, flags: F_SYMLINKS|F_AUTOMOUNTS|F_EMPTY_PATH|T_SYMLINKS) = -1 ENOENT (No such file or directory)
       0.027 ( 0.002 ms): sys_move_mount/28971 move_mount(from_dfd: 5, from_pathname: 0x40204a, to_dfd: 105, to_pathname: 0x402045, flags: F_SYMLINKS|F_AUTOMOUNTS|F_EMPTY_PATH|T_SYMLINKS|T_AUTOMOUNTS) = -1 ENOENT (No such file or directory)
       0.031 ( 0.017 ms): sys_move_mount/28971 move_mount(from_dfd: 6, from_pathname: 0x402055, to_dfd: 106, to_pathname: 0x402050, flags: F_SYMLINKS|F_AUTOMOUNTS|F_EMPTY_PATH|T_SYMLINKS|T_AUTOMOUNTS|T_EMPTY_PATH) = -1 ENOENT (No such file or directory)
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-83rim8g4k0s4gieieh5nnlck@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Arnaldo Carvalho de Melo
eefa09b499 perf beauty: Add generator for 'move_mount' flags argument
$ tools/perf/trace/beauty/move_mount_flags.sh
  static const char *move_mount_flags[] = {
	  [ilog2(0x00000001) + 1] = "F_SYMLINKS",
	  [ilog2(0x00000002) + 1] = "F_AUTOMOUNTS",
	  [ilog2(0x00000004) + 1] = "F_EMPTY_PATH",
	  [ilog2(0x00000010) + 1] = "T_SYMLINKS",
	  [ilog2(0x00000020) + 1] = "T_AUTOMOUNTS",
	  [ilog2(0x00000040) + 1] = "T_EMPTY_PATH",
  };
  $

Will be wired up to the 'perf trace' arg in a followup patch.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-px7v33suw1k2ehst52l7bwa3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Arnaldo Carvalho de Melo
8a70c6b162 perf augmented_raw_syscalls: Fix up comment
Cut'n'paste error, the second comment is about the syscalls that have as
its second arg a string.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-zo5s6rloy42u41acsf6q3pvi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Jiri Olsa
fb5a88d413 perf tools: Preserve eBPF maps when loading kcore
We need to preserve eBPF maps even if they are covered by kcore, because
we need to access eBPF dso for source data.

Add the map_groups__merge_in function to do that.  It merges a map into
map_groups by splitting the new map within the existing map regions.

Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Jiri Olsa
8529f2e673 perf machine: Keep zero in pgoff BPF map
With pgoff set to zero, the map__map_ip function will return BPF
addresses based from 0, which is what we need when we read the data from
a BPF DSO.

Adding BPF symbols with mapped IP addresses as well.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Adrian Hunter
a2d8a1585e perf intel-pt: Fix itrace defaults for perf script intel-pt documentation
Fix intel-pt documentation to reflect the change of itrace defaults for
perf script.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 4eb0681571 ("perf script: Make itrace script default to all calls")
Link: http://lkml.kernel.org/r/20190520113728.14389-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Adrian Hunter
355200e0f6 perf auxtrace: Fix itrace defaults for perf script
Commit 4eb0681571 ("perf script: Make itrace script default to all
calls") does not work for the case when '--itrace' only is used, because
default_no_sample is not being passed.

Example:

 Before:

  $ perf record -e intel_pt/cyc/u ls
  $ perf script --itrace > cmp1.txt
  $ perf script --itrace=cepwx > cmp2.txt
  $ diff -sq cmp1.txt cmp2.txt
  Files cmp1.txt and cmp2.txt differ

 After:

  $ perf script --itrace > cmp1.txt
  $ perf script --itrace=cepwx > cmp2.txt
  $ diff -sq cmp1.txt cmp2.txt
  Files cmp1.txt and cmp2.txt are identical

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 4eb0681571 ("perf script: Make itrace script default to all calls")
Link: http://lkml.kernel.org/r/20190520113728.14389-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Adrian Hunter
26f19c2eb7 perf intel-pt: Fix itrace defaults for perf script
Commit 4eb0681571 ("perf script: Make itrace script default to all
calls") does not work because 'use_browser' is being used to determine
whether to default to periodic sampling (i.e. better for perf report).
The result is that nothing but CBR events display for perf script when
no --itrace option is specified.

Fix by using 'default_no_sample' and 'inject' instead.

Example:

 Before:

  $ perf record -e intel_pt/cyc/u ls
  $ perf script > cmp1.txt
  $ perf script --itrace=cepwx > cmp2.txt
  $ diff -sq cmp1.txt cmp2.txt
  Files cmp1.txt and cmp2.txt differ

 After:

  $ perf script > cmp1.txt
  $ perf script --itrace=cepwx > cmp2.txt
  $ diff -sq cmp1.txt cmp2.txt
  Files cmp1.txt and cmp2.txt are identical

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org # v4.20+
Fixes: 90e457f7be ("perf tools: Add Intel PT support")
Link: http://lkml.kernel.org/r/20190520113728.14389-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Adrian Hunter
a685c7a4a2 perf-with-kcore.sh: Always allow fix_buildid_cache_permissions
The user's buildid cache may contain entries added by root even if root
has its own home directory (e.g. by using perfconfig to specify the same
buildid dir), so remove that validation.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190412113830.4126-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 18:37:42 -03:00
Thomas Richter
6738028dd5 perf record: Fix s390 missing module symbol and warning for non-root users
Command 'perf record' and 'perf report' on a system without kernel
debuginfo packages uses /proc/kallsyms and /proc/modules to find
addresses for kernel and module symbols. On x86 this works for root and
non-root users.

On s390, when invoked as non-root user, many of the following warnings
are shown and module symbols are missing:

    proc/{kallsyms,modules} inconsistency while looking for
        "[sha1_s390]" module!

Command 'perf record' creates a list of module start addresses by
parsing the output of /proc/modules and creates a PERF_RECORD_MMAP
record for the kernel and each module. The following function call
sequence is executed:

  machine__create_kernel_maps
    machine__create_module
      modules__parse
        machine__create_module --> for each line in /proc/modules
          arch__fix_module_text_start

Function arch__fix_module_text_start() is s390 specific. It opens
file /sys/module/<name>/sections/.text to extract the module's .text
section start address. On s390 the module loader prepends a header
before the first section, whereas on x86 the module's text section
address is identical the the module's load address.

However module section files are root readable only. For non-root the
read operation fails and machine__create_module() returns an error.
Command perf record does not generate any PERF_RECORD_MMAP record
for loaded modules. Later command perf report complains about missing
module maps.

To fix this function arch__fix_module_text_start() always returns
success. For root users there is no change, for non-root users
the module's load address is used as module's text start address
(the prepended header then counts as part of the text section).

This enable non-root users to use module symbols and avoid the
warning when perf report is executed.

Output before:

  [tmricht@m83lp54 perf]$ ./perf report -D | fgrep MMAP
  0 0x168 [0x50]: PERF_RECORD_MMAP ... x [kernel.kallsyms]_text

Output after:

  [tmricht@m83lp54 perf]$ ./perf report -D | fgrep MMAP
  0 0x168 [0x50]: PERF_RECORD_MMAP ... x [kernel.kallsyms]_text
  0 0x1b8 [0x98]: PERF_RECORD_MMAP ... x /lib/modules/.../autofs4.ko.xz
  0 0x250 [0xa8]: PERF_RECORD_MMAP ... x /lib/modules/.../sha_common.ko.xz
  0 0x2f8 [0x98]: PERF_RECORD_MMAP ... x /lib/modules/.../des_generic.ko.xz

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Link: http://lkml.kernel.org/r/20190522144601.50763-4-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:52:23 -03:00
Jiri Olsa
ed9adb2035 perf machine: Read also the end of the kernel
We mark the end of kernel based on the first module, but that could
cover some bpf program maps. Reading _etext symbol if it's present to
get precise kernel map end.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:52:23 -03:00
Arnaldo Carvalho de Melo
93f678b9ae perf test vmlinux-kallsyms: Ignore aliases to _etext when searching on kallsyms
No need to search for aliases for the symbol that marks the end of the
kernel text segment, the following patch will make such symbols not to
be found when searching in the kallsyms maps causing this test to fail.

So as a prep patch to avoid breaking bisection, ignore such symbols.

Tested-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lkml.kernel.org/n/tip-qfwuih8cvmk9doh7k5k244eq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:52:23 -03:00
Namhyung Kim
acd244b84b perf session: Add missing swap ops for namespace events
In case it's recorded in a different arch.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com> <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Fixes: f3b3614a28 ("perf tools: Add PERF_RECORD_NAMESPACES to include namespaces related info")
Link: http://lkml.kernel.org/r/20190522053250.207156-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:52:23 -03:00
Namhyung Kim
6584140ba9 perf namespace: Protect reading thread's namespace
It seems that the current code lacks holding the namespace lock in
thread__namespaces().  Otherwise it can see inconsistent results.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Link: http://lkml.kernel.org/r/20190522053250.207156-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:52:23 -03:00
Arnaldo Carvalho de Melo
fba29f1820 tools include UAPI: Update copy of files related to new fspick, fsmount, fsconfig, fsopen, move_mount and open_tree syscalls
Copy the headers changed by these csets:

  d8076bdb56 ("uapi: Wire up the mount API syscalls on non-x86 arches [ver #2]")
  9c8ad7a2ff ("uapi, x86: Fix the syscall numbering of the mount API syscalls [ver #2]")
  cf3cba4a42 ("vfs: syscall: Add fspick() to select a superblock for reconfiguration")
  93766fbd26 ("vfs: syscall: Add fsmount() to create a mount for a superblock")
  ecdab150fd ("vfs: syscall: Add fsconfig() for configuring and managing a context")
  24dcb3d90a ("vfs: syscall: Add fsopen() to prepare for superblock creation")
  2db154b3ea ("vfs: syscall: Add move_mount(2) to move mounts around")
  a07b200047 ("vfs: syscall: Add open_tree(2) to reference or clone a mount")

We need to create tables for all the flags argument in the new syscalls,
in followup patches.

This silences these perf build warnings:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/mount.h' differs from latest version at 'include/uapi/linux/mount.h'
  diff -u tools/include/uapi/linux/mount.h include/uapi/linux/mount.h
  Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'
  diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/unistd.h' differs from latest version at 'include/uapi/asm-generic/unistd.h'
  diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-knpqr1u2ffvz6641056z2mwu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:49:03 -03:00
Vitaly Chikunov
f95d050cdc perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel
When a host system has kernel headers that are newer than a compiling
kernel, mksyscalltbl fails with errors such as:

  <stdin>: In function 'main':
  <stdin>:271:44: error: '__NR_kexec_file_load' undeclared (first use in this function)
  <stdin>:271:44: note: each undeclared identifier is reported only once for each function it appears in
  <stdin>:272:46: error: '__NR_pidfd_send_signal' undeclared (first use in this function)
  <stdin>:273:43: error: '__NR_io_uring_setup' undeclared (first use in this function)
  <stdin>:274:43: error: '__NR_io_uring_enter' undeclared (first use in this function)
  <stdin>:275:46: error: '__NR_io_uring_register' undeclared (first use in this function)
  tools/perf/arch/arm64/entry/syscalls//mksyscalltbl: line 48: /tmp/create-table-xvUQdD: Permission denied

mksyscalltbl is compiled with default host includes, but run with
compiling kernel tree includes, causing some syscall numbers to being
undeclared.

Committer testing:

Before this patch, in my cross build environment, no build problems, but
these new syscalls were not in the syscalls.c generated from the
unistd.h file, which is a bug, this patch fixes it:

perfbuilder@6e20056ed532:/git/perf$ tail /tmp/build/perf/arch/arm64/include/generated/asm/syscalls.c
	[292] = "io_pgetevents",
	[293] = "rseq",
	[294] = "kexec_file_load",
	[424] = "pidfd_send_signal",
	[425] = "io_uring_setup",
	[426] = "io_uring_enter",
	[427] = "io_uring_register",
	[428] = "syscalls",
};
perfbuilder@6e20056ed532:/git/perf$ strings /tmp/build/perf/perf | egrep '^(io_uring_|pidfd_|kexec_file)'
kexec_file_load
pidfd_send_signal
io_uring_setup
io_uring_enter
io_uring_register
perfbuilder@6e20056ed532:/git/perf$
$

Well, there is that last "syscalls" thing, but that looks like some
other bug.

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Michael Petlan <mpetlan@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20190521030203.1447-1-vt@altlinux.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:49:03 -03:00
Shawn Landden
97acec7df1 perf data: Fix 'strncat may truncate' build failure with recent gcc
This strncat() is safe because the buffer was allocated with zalloc(),
however gcc doesn't know that. Since the string always has 4 non-null
bytes, just use memcpy() here.

    CC       /home/shawn/linux/tools/perf/util/data-convert-bt.o
  In file included from /usr/include/string.h:494,
                   from /home/shawn/linux/tools/lib/traceevent/event-parse.h:27,
                   from util/data-convert-bt.c:22:
  In function ‘strncat’,
      inlined from ‘string_set_value’ at util/data-convert-bt.c:274:4:
  /usr/include/powerpc64le-linux-gnu/bits/string_fortified.h:136:10: error: ‘__builtin_strncat’ output may be truncated copying 4 bytes from a string of length 4 [-Werror=stringop-truncation]
    136 |   return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest));
        |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Shawn Landden <shawn@git.icu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
LPU-Reference: 20190518183238.10954-1-shawn@git.icu
Link: https://lkml.kernel.org/n/tip-289f1jice17ta7tr3tstm9jm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-28 09:49:03 -03:00
Jin Yao
4fc4d8dfa0 perf stat: Support 'percore' event qualifier
With this patch, we can use the 'percore' event qualifier in perf-stat.

  root@skl:/tmp# perf stat -e cpu/event=0,umask=0x3,percore=1/,cpu/event=0,umask=0x3/ -a -A -I1000
    1.000773050 S0-C0   98,352,832 cpu/event=0,umask=0x3,percore=1/  (50.01%)
    1.000773050 S0-C1  103,763,057 cpu/event=0,umask=0x3,percore=1/  (50.02%)
    1.000773050 S0-C2  196,776,995 cpu/event=0,umask=0x3,percore=1/  (50.02%)
    1.000773050 S0-C3  176,493,779 cpu/event=0,umask=0x3,percore=1/  (50.02%)
    1.000773050 CPU0    47,699,641 cpu/event=0,umask=0x3/            (50.02%)
    1.000773050 CPU1    49,052,451 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU2   102,771,422 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU3   100,784,662 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU4    43,171,342 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU5    54,152,158 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU6    93,618,410 cpu/event=0,umask=0x3/            (49.98%)
    1.000773050 CPU7    74,477,589 cpu/event=0,umask=0x3/            (49.99%)

In this example, we count the event 'ref-cycles' per-core and per-CPU in
one perf stat command-line. From the output, we can see:

  S0-C0 = CPU0 + CPU4
  S0-C1 = CPU1 + CPU5
  S0-C2 = CPU2 + CPU6
  S0-C3 = CPU3 + CPU7

So the result is expected (tiny difference is ignored).

Note that, the 'percore' event qualifier needs to use with option '-A'.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1555077590-27664-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:24 -03:00
Jin Yao
40480a8136 perf stat: Factor out aggregate counts printing
Move the aggregate counts printing to a new function
print_counter_aggrdata, which will be used in following patches.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1555077590-27664-3-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:24 -03:00
Jin Yao
064b4e82aa perf tools: Add a 'percore' event qualifier
Add a 'percore' event qualifier, like cpu/event=0,umask=0x3,percore=1/,
that sums up the event counts for both hardware threads in a core.

We can already do this with --per-core, but it's often useful to do
this together with other metrics that are collected per hardware thread.
So we need to support this per-core counting on a event level.

This can be implemented in only the user tool, no kernel support needed.

 v4:
 ---
 1. Add Arnaldo's patch which updates the documentation for
    this new qualifier.
 2. Rebase to latest perf/core branch

 v3:
 ---
 Simplify the code according to Jiri's comments.
 Before:
   "return term->val.percore ? true : false;"
 Now:
   "return term->val.percore;"

 v2:
 ---
 Change the qualifier name from 'coresum' to 'percore' according to
 comments from Jiri and Andi.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1555077590-27664-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:24 -03:00
Thomas Richter
6cf6265639 perf docs: Add description for stderr
'perf report' displays recorded data on the screen and emits warnings
and debug messages in the status line (last one on screen).

perf also supports the possibility to write all debug messages to stderr
(instead of writing them to the status line).

This is achieved with the following command:

  # ./perf --debug stderr=1 report -vvvvv -i ~/fast.data 2>/tmp/2
  # ll /tmp/2
  -rw-rw-r-- 1 tmricht tmricht 5420835 May  7 13:46 /tmp/2
  #

The usage of variable stderr=1 is not documented, so add it to the perf
man page.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20190513080220.91966-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:24 -03:00
Adrian Hunter
1b6599a9d8 perf intel-pt: Fix sample timestamp wrt non-taken branches
The sample timestamp is updated to ensure that the timestamp represents
the time of the sample and not a branch that the decoder is still
walking towards. The sample timestamp is updated when the decoder
returns, but the decoder does not return for non-taken branches. Update
the sample timestamp then also.

Note that commit 3f04d98e97 ("perf intel-pt: Improve sample
timestamp") was also a stable fix and appears, for example, in v4.4
stable tree as commit a4ebb58fd124 ("perf intel-pt: Improve sample
timestamp").

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org # v4.4+
Fixes: 3f04d98e97 ("perf intel-pt: Improve sample timestamp")
Link: http://lkml.kernel.org/r/20190510124143.27054-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:24 -03:00
Adrian Hunter
61b6e08dc8 perf intel-pt: Fix improved sample timestamp
The decoder uses its current timestamp in samples. Usually that is a
timestamp that has already passed, but in some cases it is a timestamp
for a branch that the decoder is walking towards, and consequently
hasn't reached.

The intel_pt_sample_time() function decides which is which, but was not
handling TNT packets exactly correctly.

In the case of TNT, the timestamp applies to the first branch, so the
decoder must first walk to that branch.

That means intel_pt_sample_time() should return true for TNT, and this
patch makes that change. However, if the first branch is a non-taken
branch (i.e. a 'N'), then intel_pt_sample_time() needs to return false
for subsequent taken branches in the same TNT packet.

To handle that, introduce a new state INTEL_PT_STATE_TNT_CONT to
distinguish the cases.

Note that commit 3f04d98e97 ("perf intel-pt: Improve sample
timestamp") was also a stable fix and appears, for example, in v4.4
stable tree as commit a4ebb58fd124 ("perf intel-pt: Improve sample
timestamp").

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org # v4.4+
Fixes: 3f04d98e97 ("perf intel-pt: Improve sample timestamp")
Link: http://lkml.kernel.org/r/20190510124143.27054-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:23 -03:00
Adrian Hunter
7ba8fa20e2 perf intel-pt: Fix instructions sampling rate
The timestamp used to determine if an instruction sample is made, is an
estimate based on the number of instructions since the last known
timestamp. A consequence is that it might go backwards, which results in
extra samples. Change it so that a sample is only made when the
timestamp goes forwards.

Note this does not affect a sampling period of 0 or sampling periods
specified as a count of instructions.

Example:

 Before:

 $ perf script --itrace=i10us
 ls 13812 [003] 2167315.222583:       3270 instructions:u:      7fac71e2e494 __GI___tunables_init+0xf4 (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:      30902 instructions:u:      7fac71e2da0f _dl_cache_libcmp+0x2f (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:         10 instructions:u:      7fac71e2d9ff _dl_cache_libcmp+0x1f (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:          8 instructions:u:      7fac71e2d9ea _dl_cache_libcmp+0xa (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:         14 instructions:u:      7fac71e2d9ea _dl_cache_libcmp+0xa (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:          6 instructions:u:      7fac71e2d9ff _dl_cache_libcmp+0x1f (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:         14 instructions:u:      7fac71e2d9ff _dl_cache_libcmp+0x1f (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:          4 instructions:u:      7fac71e2dab2 _dl_cache_libcmp+0xd2 (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222728:      16423 instructions:u:      7fac71e2477a _dl_map_object_deps+0x1ba (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222734:      12731 instructions:u:      7fac71e27938 _dl_name_match_p+0x68 (/lib/x86_64-linux-gnu/ld-2.28.so)
 ...

 After:
 $ perf script --itrace=i10us
 ls 13812 [003] 2167315.222583:       3270 instructions:u:      7fac71e2e494 __GI___tunables_init+0xf4 (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222667:      30902 instructions:u:      7fac71e2da0f _dl_cache_libcmp+0x2f (/lib/x86_64-linux-gnu/ld-2.28.so)
 ls 13812 [003] 2167315.222728:      16479 instructions:u:      7fac71e2477a _dl_map_object_deps+0x1ba (/lib/x86_64-linux-gnu/ld-2.28.so)
 ...

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: f4aa081949 ("perf tools: Add Intel PT decoder")
Link: http://lkml.kernel.org/r/20190510124143.27054-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:23 -03:00
Kan Liang
6466ec14aa perf regs x86: Add X86 specific arch__intr_reg_mask()
XMM registers can be collected on Icelake and later platforms.

Add specific arch__intr_reg_mask(), which creating an event to check if
the kernel and hardware can collect XMM registers.

Test on Skylake which doesn't support XMM registers collection. There is
nothing changed.

   #perf record -I?
   available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9
   R10 R11 R12 R13 R14 R15

   Usage: perf record [<options>] [<command>]
    or: perf record [<options>] -- <command> [<options>]

    -I, --intr-regs[=<any register>]
                          sample selected machine registers on
   interrupt, use '-I?' to list register names

   #perf record -I
   [ perf record: Woken up 1 times to write data ]
   [ perf record: Captured and wrote 0.905 MB perf.data (2520 samples) ]

   #perf evlist -v
   cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type:
   IP|TID|TIME|CPU|PERIOD|REGS_INTR, read_format: ID, disabled: 1,
   inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3,
   sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol:
   1, bpf_event: 1, sample_regs_intr: 0xff0fff

Test on Icelake which support XMM registers collection.

   #perf record -I?
   available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10
   R11 R12 R13 R14 R15 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 XMM9
   XMM10 XMM11 XMM12 XMM13 XMM14 XMM15

   Usage: perf record [<options>] [<command>]
    or: perf record [<options>] -- <command> [<options>]

    -I, --intr-regs[=<any register>]
                          sample selected machine registers on
   interrupt, use '-I?' to list register names

   #perf record -I
   [ perf record: Woken up 1 times to write data ]
   [ perf record: Captured and wrote 0.800 MB perf.data (318 samples) ]

   #perf evlist -v
   cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type:
   IP|TID|TIME|CPU|PERIOD|REGS_INTR, read_format: ID, disabled: 1,
   inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3,
   sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol:
   1, bpf_event: 1, sample_regs_intr: 0xffffffff00ff0fff

Committer notes:

Don't set attr.sample_period as a named struct init, as it is part of an
unnamed union in 'struct perf_event_attr', and doing so breaks the build
on older gcc versions, such as:

  gcc version 4.1.2 20080704 (Red Hat 4.1.2-55)
  gcc version 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC)

  arch/x86/util/perf_regs.c: In function 'arch__intr_reg_mask':
  arch/x86/util/perf_regs.c:279: error: unknown field 'sample_period' specified in initializer
  cc1: warnings being treated as errors
  arch/x86/util/perf_regs.c:279: warning: missing braces around initializer
  arch/x86/util/perf_regs.c:279: warning: (near initialization for 'attr.<anonymous>')

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
[ Only on a lenovo t480s, a skylake machine, where the XMM registers didn't show up in -I?/--user-regs=? as expected ]
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1557865174-56264-3-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:23 -03:00
Kan Liang
af785e75bf perf parse-regs: Add generic support for arch__intr/user_reg_mask()
There may be different register mask for use with intr or user on some
platforms, e.g. Icelake.

Add weak functions arch__intr_reg_mask() and arch__user_reg_mask() to
return intr and user register mask respectively.

Check mask before printing or comparing the register name.

Generic code always return PERF_REGS_MASK. No functional change.

Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1557865174-56264-2-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-16 14:17:12 -03:00
Kan Liang
aeea9062d9 perf parse-regs: Split parse_regs
The available registers for --int-regs and --user-regs may be different,
e.g. XMM registers.

Split parse_regs into two dedicated functions for --int-regs and
--user-regs respectively.

Modify the warning message. "--user-regs=?" should be applied to show
the available registers for --user-regs.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1557865174-56264-1-git-send-email-kan.liang@linux.intel.com
[ Changed docs as suggested by Ravi and agreed by Kan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-15 16:36:49 -03:00
Florian Fainelli
7025fdbea3 perf vendor events arm64: Add Cortex-A57 and Cortex-A72 events
The Cortex-A57 and Cortex-A72 both support all ARMv8 recommended events
up to the RC_ST_SPEC (0x91) event with the exception of:

- L1D_CACHE_REFILL_INNER (0x44)
- L1D_CACHE_REFILL_OUTER (0x45)
- L1D_TLB_RD (0x4E)
- L1D_TLB_WR (0x4F)
- L2D_TLB_REFILL_RD (0x5C)
- L2D_TLB_REFILL_WR (0x5D)
- L2D_TLB_RD (0x5E)
- L2D_TLB_WR (0x5F)
- STREX_SPEC (0x6F)

Create an appropriate JSON file for mapping those events and update the
mapfile.csv for matching the Cortex-A57 and Cortex-A72 MIDR to that
file.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean V Kelley <seanvk.dev@oregontracks.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org (moderated list:arm pmu profiling and debugging)
Link: http://lkml.kernel.org/r/20190513202522.9050-4-f.fainelli@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-15 16:36:49 -03:00
Florian Fainelli
93fe8f1e11 perf vendor events arm64: Map Brahma-B53 CPUID to cortex-a53 events
Broadcom's Brahma-B53 CPUs support the same type of events that the
Cortex-A53 supports, recognize its CPUID and map it to the cortex-a53
events.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean V Kelley <seanvk.dev@oregontracks.org>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org (moderated list
Link: http://lkml.kernel.org/r/20190513202522.9050-3-f.fainelli@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-15 16:36:49 -03:00
Florian Fainelli
ae833a6124 perf vendor events arm64: Remove [[:xdigit:]] wildcard
ARM64's implementation of get_cpuidr_str() masks out the revision bits
[3:0] while reading the CPU identifier, there is no need for the
[[:xdigit:]] wildcard.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean V Kelley <seanvk.dev@oregontracks.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org (moderated list:arm pmu profiling and debugging)
Link: http://lkml.kernel.org/r/20190513202522.9050-2-f.fainelli@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-15 16:36:49 -03:00
Zenghui Yu
8e8f515d56 perf jevents: Remove unused variable
Address gcc warning:

  pmu-events/jevents.c: In function ‘save_arch_std_events’:
  pmu-events/jevents.c:417:15: warning: unused variable ‘sb’ [-Wunused-variable]
    struct stat *sb = data;
                 ^~

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: wanghaibin.wang@huawei.com
Link: http://lkml.kernel.org/r/1557919169-23972-1-git-send-email-yuzenghui@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-05-15 16:36:49 -03:00