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Groups > linux.kernel > #1496907
| From | tip-bot for Adrian Hunter <tipbot@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [tip:perf/urgent] perf intel-pt: Fix estimated timestamps for cycle-accurate mode |
| Date | 2016-10-07 00:50 +0200 |
| Message-ID | <sppEe-7qB-35@gated-at.bofh.it> (permalink) |
| References | <smlx7-66C-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Commit-ID: 51ee6481fa8e879cc942bcc1b0af713e158b7a98 Gitweb: http://git.kernel.org/tip/51ee6481fa8e879cc942bcc1b0af713e158b7a98 Author: Adrian Hunter <adrian.hunter@intel.com> AuthorDate: Wed, 28 Sep 2016 14:41:35 +0300 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Wed, 5 Oct 2016 08:15:29 -0300 perf intel-pt: Fix estimated timestamps for cycle-accurate mode In cycle-accurate mode, timestamps can be calculated from CYC packets. The decoder also estimates timestamps based on the number of instructions since the last timestamp. For that to work in cycle-accurate mode, the instruction count needs to be reset to zero when a timestamp is calculated from a CYC packet, but that wasn't happening, so fix it. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: stable@vger.kernel.org # v4.3+ Link: http://lkml.kernel.org/r/1475062896-22274-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c index 7591a0c..3d1d446 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -1353,6 +1353,8 @@ static void intel_pt_calc_cyc_timestamp(struct intel_pt_decoder *decoder) timestamp, decoder->timestamp); else decoder->timestamp = timestamp; + + decoder->timestamp_insn_cnt = 0; } /* Walk PSB+ packets when already in sync. */
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[PATCH 1/2] perf intel-pt: Fix estimated timestamps for cycle-accurate mode Adrian Hunter <adrian.hunter@intel.com> - 2016-09-28 13:50 +0200
[PATCH 2/2] perf intel-pt: Fix MTC timestamp calculation for large MTC periods Adrian Hunter <adrian.hunter@intel.com> - 2016-09-28 13:50 +0200
[tip:perf/urgent] perf intel-pt: Fix MTC timestamp calculation for large MTC periods tip-bot for Adrian Hunter <tipbot@zytor.com> - 2016-10-07 00:50 +0200
Re: [PATCH 1/2] perf intel-pt: Fix estimated timestamps for cycle-accurate mode Adrian Hunter <adrian.hunter@intel.com> - 2016-10-05 09:40 +0200
Re: [PATCH 1/2] perf intel-pt: Fix estimated timestamps for cycle-accurate mode Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-10-05 13:20 +0200
[tip:perf/urgent] perf intel-pt: Fix estimated timestamps for cycle-accurate mode tip-bot for Adrian Hunter <tipbot@zytor.com> - 2016-10-07 00:50 +0200
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