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perf intel-pt: Add support for decoding FUP/TIP only
authorAdrian Hunter <adrian.hunter@intel.com>
Fri, 10 Jul 2020 15:11:03 +0000 (18:11 +0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 6 Aug 2020 12:02:14 +0000 (09:02 -0300)
commit7c1b16ba0e26e6802d80c99c92529f29bcdcea25
tree788eca05bf50ec627258a751dcaaa27b3388a2e7
parent51971536ef53478ec92cd9e8249048743169df22
perf intel-pt: Add support for decoding FUP/TIP only

Use the new itrace 'q' option to add support for a mode of decoding that
ignores TNT, does not walk object code, but gets the ip from FUP and TIP
packets.

Example:

 $ perf record -e intel_pt//u grep -rI pudding drivers
 [ perf record: Woken up 52 times to write data ]
 [ perf record: Captured and wrote 57.870 MB perf.data ]
 $ time perf script --itrace=bi | wc -l
 58948289

 real    1m23.863s
 user    1m23.251s
 sys     0m7.452s
 $ time perf script --itrace=biq | wc -l
 3385694

 real    0m4.453s
 user    0m4.455s
 sys     0m0.328s

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200710151104.15137-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/Documentation/perf-intel-pt.txt
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
tools/perf/util/intel-pt.c