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author | Stephane Eranian <eranian@google.com> | 2015-08-31 18:41:13 +0200 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-10-29 17:16:20 -0300 |
commit | dc323ce8e72d6d1beb9af9bbd29c4d55ce3d7fb0 (patch) | |
tree | fe8e58bd60faaeaca564ee5c86812e68867b2a4c /COPYING | |
parent | 729a78417a7b5c1f59e15d21a1900758375c4647 (diff) | |
download | op-kernel-dev-dc323ce8e72d6d1beb9af9bbd29c4d55ce3d7fb0.zip op-kernel-dev-dc323ce8e72d6d1beb9af9bbd29c4d55ce3d7fb0.tar.gz |
perf script: Enable printing of branch stack
This patch improves perf script by enabling printing of the
branch stack via the 'brstack' and 'brstacksym' arguments to
the field selection option -F. The option is off by default
and operates only if the perf.data file has branch stack content.
The branches are printed in to/from pairs. The most recent branch
is printed first. The number of branch entries vary based on the
underlying hardware and filtering used.
The brstack prints FROM/TO addresses in raw hexadecimal format.
The brstacksym prints FROM/TO addresses in symbolic form wherever
possible.
$ perf script -F ip,brstack
5d3000 0x401aa0/0x5d2000/M/-/-/-/0 ...
$ perf script -F ip,brstacksym
4011e0 noploop+0x0/noploop+0x0/P/-/-/0
The notation F/T/M/X/A/C describes the attributes of the branch.
F=from, T=to, M/P=misprediction/prediction, X=TSX, A=TSX abort, C=cycles (SKL)
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yuanfang Chen <cyfmxc@gmail.com>
Link: http://lkml.kernel.org/r/1441039273-16260-5-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'COPYING')
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