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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-09-28 13:41:35 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-10-05 13:15:29 +0200 |
| commit | 51ee6481fa8e879cc942bcc1b0af713e158b7a98 (patch) | |
| tree | bc805159faeca437d6b179d48614c0ad5663fb22 /tools/perf/util/intel-pt-decoder | |
| parent | perf uretprobe ppc64le: Fix probe location (diff) | |
| download | linux-51ee6481fa8e879cc942bcc1b0af713e158b7a98.tar.xz linux-51ee6481fa8e879cc942bcc1b0af713e158b7a98.zip | |
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>
Diffstat (limited to 'tools/perf/util/intel-pt-decoder')
| -rw-r--r-- | tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 |
1 files changed, 2 insertions, 0 deletions
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 7591a0c37473..3d1d446f037f 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. */ |