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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>
This commit is contained in:
Adrian Hunter 2016-09-28 14:41:35 +03:00 committed by Arnaldo Carvalho de Melo
parent a1d9972e59
commit 51ee6481fa
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
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@ -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. */