linux_dsm_epyc7002/tools/perf
Kan Liang cb5ef60067 perf stat: Error out unsupported group leader immediately
perf stat ignores the unsupported event and continue to count supported
event. But if the unsupported event is group leader, perf tool will
crash. After applying this patch, the unsupported group leader will
error out immediately.

Without this patch:

  $ perf stat -x, -e '{node-prefetch-refs,cycles}' --  sleep 1
  perf: util/evsel.c:1009: get_group_fd: Assertion `!(fd == -1)' failed.
  Aborted (core dumped)

With this patch:

  $ perf stat -x, -e '{node-prefetch-refs,cycles}' --  sleep 1
  Error:
  The node-prefetch-refs event is not supported.

Commiter note: Here I got a different output, but no core dump:

  [acme@zoo linux]$ perf stat -x, -e '{node-prefetch-refs,cycles}' -- sleep 1
  Error:
  The sys_perf_event_open() syscall returned with 22 (Invalid argument)
  for event (node-prefetch-refs).
  /bin/dmesg may provide additional information.
  No CONFIG_PERF_EVENTS=y kernel support configured?

Signed-off-by: Kan Liang <kan.liang@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Link: http://lkml.kernel.org/r/1434004360-8570-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-06-11 11:07:40 -03:00
..
arch perf tools: Add ARM64 perf_regs_load to support libunwind and enable testing 2015-05-29 12:43:40 -03:00
bench perf bench numa: Share sched_getcpu() __weak def with cloexec.c 2015-05-18 12:36:46 -03:00
config perf tools: Improve setting of gcc debug option 2015-05-27 12:21:45 -03:00
Documentation perf record: Amend option summaries 2015-06-10 12:00:27 -03:00
python
scripts perf build: Add scripts objects building 2015-02-12 11:49:53 -03:00
tests perf tools: Reference count struct dso 2015-06-08 10:31:40 -03:00
ui perf tools: Make Ctrl-C stop processing on TUI 2015-05-29 12:49:00 -03:00
util perf evsel: Display 0x for hex values when printing the attribute 2015-06-11 10:56:01 -03:00
.gitignore perf build: Use FEATURE-DUMP instead of PERF-FEATURES in the .gitignore file 2015-03-20 17:49:51 -03:00
Build perf tools: Add new 'perf data' command 2015-02-25 12:42:25 -03:00
builtin-annotate.c perf annotate: Fix -i option, which is currently ignored. 2015-05-29 12:43:34 -03:00
builtin-bench.c perf bench futex: Support parallel waker threads 2015-05-08 16:23:50 -03:00
builtin-buildid-cache.c perf buildid-cache: Show usage with incorrect params 2015-02-27 15:52:40 -03:00
builtin-buildid-list.c perf tools: Hit all build ids when AUX area tracing 2015-05-04 19:49:42 -03:00
builtin-data.c perf data: Support using -f to override perf.data file ownership for 'convert' 2015-04-02 13:18:52 -03:00
builtin-diff.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-evlist.c perf evlist: Support using -f to override perf.data file ownership 2015-04-02 13:18:45 -03:00
builtin-help.c perf tools: Add the bash completion for listing subsubcommands of perf help 2015-03-19 13:49:39 -03:00
builtin-inject.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-kmem.c perf kmem: Fix compiler warning about may be accessing uninitialized variable 2015-05-29 12:43:40 -03:00
builtin-kvm.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-list.c perf list: Extend raw-dump to certain kind of events 2015-02-27 15:52:24 -03:00
builtin-lock.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-mem.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-probe.c perf probe: Add --range option to show a variable's location range 2015-05-12 09:59:50 -03:00
builtin-record.c perf record: Amend option summaries 2015-06-10 12:00:27 -03:00
builtin-report.c perf tools: handle PERF_RECORD_LOST_SAMPLES 2015-06-07 16:09:06 +02:00
builtin-sched.c perf sched: Add option to merge like comms to lat output 2015-05-27 12:21:45 -03:00
builtin-script.c perf machine: Protect the machine->threads with a rwlock 2015-05-08 16:19:27 -03:00
builtin-stat.c perf stat: Error out unsupported group leader immediately 2015-06-11 11:07:40 -03:00
builtin-timechart.c perf tools: Elliminate alignment holes 2015-05-18 10:17:33 -03:00
builtin-top.c perf hists: Reducing arguments of hist_entry_iter__add() 2015-05-27 12:21:43 -03:00
builtin-trace.c perf trace: Fix the build on older distros 2015-05-14 19:27:46 -03:00
builtin.h perf tools: Add new 'perf data' command 2015-02-25 12:42:25 -03:00
command-list.txt perf tools: Add new 'perf data' command 2015-02-25 12:42:25 -03:00
CREDITS
design.txt
Makefile perf tools: Use getconf to determine number of online CPUs 2015-05-04 12:43:40 -03:00
Makefile.perf tools lib traceevent: Export dynamic symbols used by traceevent plugins 2015-06-08 10:30:31 -03:00
MANIFEST tools: Move tools/perf/util/include/linux/{list.h,poison.h} to tools/include 2015-06-02 19:07:29 -03:00
perf-archive.sh
perf-completion.sh perf tools: Avoid confusion with preloaded bash function for perf bash completion 2015-03-19 13:53:27 -03:00
perf-read-vdso.c
perf-sys.h perf tools: Move generic barriers out of perf-sys.h 2015-05-08 16:05:08 -03:00
perf-with-kcore.sh
perf.c perf tools: Fix the bash completion problem of 'perf --*' 2015-02-27 15:52:28 -03:00
perf.h perf tools: Add AUX area tracing Snapshot Mode 2015-05-05 18:13:00 -03:00