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authorLeo Yan <leo.yan@linaro.org>2020-09-14 19:53:09 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-09-22 13:46:40 -0300
commitd110162cafc80dad0622cfd40f3113aebb77e1bb (patch)
tree65f012aaa3160ee6570f6dfdc2c2a6e3a85d56e9 /tools/lib/perf
parent78a93d4cec6bc7c6011319d2b8f6509d96de186f (diff)
perf tsc: Support cap_user_time_short for event TIME_CONV
The synthesized event TIME_CONV doesn't contain the complete parameters for counters, this will lead to wrong conversion between counter cycles and timestamp. This patch extends event TIME_CONV to record flags 'cap_user_time_zero' which is used to indicate the counter parameters are valid or not, if not will directly return 0 for timestamp calculation. And record the flag 'cap_user_time_short' and its relevant fields 'time_cycles' and 'time_mask' for cycle calibration. Signed-off-by: Leo Yan <leo.yan@linaro.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Gustavo A. R. Silva <gustavoars@kernel.org> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Kemeng Shi <shikemeng@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nick Gasson <nick.gasson@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Remi Bernon <rbernon@codeweavers.com> Cc: Stephane Eranian <eranian@google.com> Cc: Steve Maclean <steve.maclean@microsoft.com> Cc: Will Deacon <will@kernel.org> Cc: Zou Wei <zou_wei@huawei.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200914115311.2201-5-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/perf')
-rw-r--r--tools/lib/perf/include/perf/event.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index 842028858d66..a6dbba6b9073 100644
--- a/tools/lib/perf/include/perf/event.h
+++ b/tools/lib/perf/include/perf/event.h
@@ -324,6 +324,10 @@ struct perf_record_time_conv {
__u64 time_shift;
__u64 time_mult;
__u64 time_zero;
+ __u64 time_cycles;
+ __u64 time_mask;
+ bool cap_user_time_zero;
+ bool cap_user_time_short;
};
struct perf_record_header_feature {