[PATCH V2 0/6] perf intel-pt: Improve the data displayed when using address filters

[Adrian Hunter]

Hi

Here is V2 of some Intel PT patches to improve the data displayed when using
address filters.

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


Changes in V2:

	Improve commit messages


Adrian Hunter (6):
      perf script: Enhance sample flags for trace begin / end
      perf db-export: Add trace begin / end branch type variants
      perf tools: Improve thread_stack__event() for trace begin / end
      perf tools: Improve thread_stack__process() for trace begin / end
      perf intel-pt: Add decoder flags for trace begin / end
      perf intel-pt: Implement decoder flags for trace begin / end

 tools/perf/builtin-script.c                        | 36 +++++++++++----
 tools/perf/util/db-export.c                        | 22 ++++++++++
 .../perf/util/intel-pt-decoder/intel-pt-decoder.c  | 34 ++++++++++-----
 .../perf/util/intel-pt-decoder/intel-pt-decoder.h  |  2 +
 tools/perf/util/intel-pt.c                         |  5 +++
 tools/perf/util/thread-stack.c                     | 51 +++++++++++++++++-----
 6 files changed, 118 insertions(+), 32 deletions(-)


Regards
Adrian