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linux_dsm_epyc7002/tools/perf/util/intel-pt-decoder
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Adrian Hunter bea6385789 perf intel-pt: Implement decoder flags for trace begin / end 
Have the Intel PT decoder implement the new Intel PT decoder flags for
trace begin / end.

Previously, the decoder would indicate begin / end by a branch from / to
zero. That hides useful information, in particular when a trace ends
with a call. That happens when using address filters, for example:

  $ perf record -e intel_pt/cyc,mtc_period=0,noretcomp/u --filter='filter main @ /bin/uname ' uname Linux
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.031 MB perf.data ]

Before:

  $ perf script --itrace=cre -Ftime,flags,ip,sym,symoff,addr --ns
   7249.622183310:   tr strt         0 [unknown] =>   401590 main+0x0
   7249.622183311:   call       4015b9 main+0x29 =>        0 [unknown]
   7249.622183711:   tr strt         0 [unknown] =>   4015be main+0x2e
   7249.622183714:   call       4015c8 main+0x38 =>        0 [unknown]
   7249.622247731:   tr strt         0 [unknown] =>   4015cd main+0x3d
   7249.622247760:   call       4015d7 main+0x47 =>        0 [unknown]
   7249.622248340:   tr strt         0 [unknown] =>   4015dc main+0x4c
   7249.622248341:   call       4015e1 main+0x51 =>        0 [unknown]
   7249.622248681:   tr strt         0 [unknown] =>   4015e6 main+0x56
   7249.622248682:   call       4015eb main+0x5b =>        0 [unknown]
   7249.622248970:   tr strt         0 [unknown] =>   4015f0 main+0x60
   7249.622248971:   call       401612 main+0x82 =>        0 [unknown]
   7249.622249757:   tr strt         0 [unknown] =>   401617 main+0x87
   7249.622249770:   call       401847 main+0x2b7 =>        0 [unknown]
   7249.622250606:   tr strt         0 [unknown] =>   40184c main+0x2bc
   7249.622250612:   call       4019bf main+0x42f =>        0 [unknown]
   7249.622256823:   tr strt         0 [unknown] =>   4019c4 main+0x434
   7249.622256863:   call       4019f5 main+0x465 =>        0 [unknown]
   7249.622264217:   tr strt         0 [unknown] =>   4019fa main+0x46a
   7249.622264235:   call       401832 main+0x2a2 =>        0 [unknown]

After:

  $ perf script --itrace=cre -Ftime,flags,ip,sym,symoff,addr --ns
   7249.622183310:   tr strt              0 [unknown] =>   401590 main+0x0
   7249.622183311:   tr end  call    4015b9 main+0x29 =>   401ef0 set_program_name+0x0
   7249.622183711:   tr strt              0 [unknown] =>   4015be main+0x2e
   7249.622183714:   tr end  call    4015c8 main+0x38 =>   4014b0 setlocale@plt+0x0
   7249.622247731:   tr strt              0 [unknown] =>   4015cd main+0x3d
   7249.622247760:   tr end  call    4015d7 main+0x47 =>   4012d0 bindtextdomain@plt+0x0
   7249.622248340:   tr strt              0 [unknown] =>   4015dc main+0x4c
   7249.622248341:   tr end  call    4015e1 main+0x51 =>   4012b0 textdomain@plt+0x0
   7249.622248681:   tr strt              0 [unknown] =>   4015e6 main+0x56
   7249.622248682:   tr end  call    4015eb main+0x5b =>   404340 atexit+0x0
   7249.622248970:   tr strt              0 [unknown] =>   4015f0 main+0x60
   7249.622248971:   tr end  call    401612 main+0x82 =>   401320 getopt_long@plt+0x0
   7249.622249757:   tr strt              0 [unknown] =>   401617 main+0x87
   7249.622249770:   tr end  call    401847 main+0x2b7 =>   401360 uname@plt+0x0
   7249.622250606:   tr strt              0 [unknown] =>   40184c main+0x2bc
   7249.622250612:   tr end  call    4019bf main+0x42f =>   401b10 print_element+0x0
   7249.622256823:   tr strt              0 [unknown] =>   4019c4 main+0x434
   7249.622256863:   tr end  call    4019f5 main+0x465 =>   401340 __overflow@plt+0x0
   7249.622264217:   tr strt              0 [unknown] =>   4019fa main+0x46a
   7249.622264235:   tr end  call    401832 main+0x2a2 =>   401520 exit@plt+0x0

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20180920130048.31432-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-09-20 15:19:52 -03:00
..
Build perf intel-pt: Improve build messages for files that differ from the kernel 2017-11-29 18:18:02 -03:00
gen-insn-attr-x86.awk License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
inat_types.h perf tools: Fix tarball build broken by pt/bts 2015-08-22 12:27:07 -03:00
inat.c perf tools: Fix tarball build broken by pt/bts 2015-08-22 12:27:07 -03:00
inat.h perf intel-pt: Bring instruction decoder files into line with the kernel 2017-11-28 14:28:49 -03:00
insn.c perf tools: Add AVX-512 support to the instruction decoder used by Intel PT 2016-07-21 09:37:18 -03:00
insn.h perf tools intel-pt-decoder: Update insn.h from the kernel sources 2018-06-01 16:13:18 -03:00
intel-pt-decoder.c perf intel-pt: Implement decoder flags for trace begin / end 2018-09-20 15:19:52 -03:00
intel-pt-decoder.h perf intel-pt: Add decoder flags for trace begin / end 2018-09-20 15:19:51 -03:00
intel-pt-insn-decoder.c perf/core improvements and fixes: 2017-03-16 17:29:23 +01:00
intel-pt-insn-decoder.h perf intel-pt/bts: Tidy instruction buffer size usage 2016-10-24 10:31:32 -03:00
intel-pt-log.c perf intel-pt/bts: Tidy instruction buffer size usage 2016-10-24 10:31:32 -03:00
intel-pt-log.h tools: Adopt __printf from kernel sources 2017-06-19 15:25:26 -03:00
intel-pt-pkt-decoder.c perf intel-pt: Fix packet decoding of CYC packets 2018-06-25 11:59:36 -03:00
intel-pt-pkt-decoder.h perf intel-pt: Add decoder support for ptwrite and power event packets 2017-06-21 11:35:50 -03:00
x86-opcode-map.txt x86/decoder: Fix and update the opcodes map 2017-12-15 13:45:20 +01:00