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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-09-28 14:41:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:01:27 -0400 |
| commit | d04565939ca6f34097e1bc21f3c01e8e1131291f (patch) | |
| tree | de1fee153d6f2cd22d88e1f81f423ef89dc907c2 | |
| parent | 0ea2bdfcdd0e10783a6f5bd0834934e506ec3b65 (diff) | |
| download | linux-stable-d04565939ca6f34097e1bc21f3c01e8e1131291f.tar.gz linux-stable-d04565939ca6f34097e1bc21f3c01e8e1131291f.tar.bz2 linux-stable-d04565939ca6f34097e1bc21f3c01e8e1131291f.zip | |
perf intel-pt: Fix estimated timestamps for cycle-accurate mode
commit 51ee6481fa8e879cc942bcc1b0af713e158b7a98 upstream.
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>
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 9409d014b46c..38c5be26c755 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -1323,6 +1323,8 @@ 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. */ |