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authorAdrian Hunter <adrian.hunter@intel.com>2016-09-28 14:41:35 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-28 03:01:27 -0400
commitd04565939ca6f34097e1bc21f3c01e8e1131291f (patch)
treede1fee153d6f2cd22d88e1f81f423ef89dc907c2 /tools
parent0ea2bdfcdd0e10783a6f5bd0834934e506ec3b65 (diff)
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-decoder.c2
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. */