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perf hist: Add 'kvm_info' field in histograms entry

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__hists__add_entry() creates a temporary entry and compare it with
existed histograms entries, if any existed entry equals to the
temporary entry it skips to allocation to avoid duplication.

The problem for support KVM event in histograms is it doesn't contain
any info to identify KVM event and can be used for comparison entries.

This patch adds 'kvm_info' field in the histograms entry which contains
the KVM event's key, this identifier will be used for comparison
histograms entries in later change.

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: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230315145112.186603-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan
2023-03-15 22:51:05 +08:00
committed by Arnaldo Carvalho de Melo
parent 001b08f4e2
commit ebf39d29b9
8 changed files with 27 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/builtin-diff.c
+2 -2
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@@ -423,7 +423,7 @@ static int diff__process_sample_event(struct perf_tool *tool,
switch (compute) {
case COMPUTE_CYCLES:
if (!hists__add_entry_ops(hists, &block_hist_ops, &al, NULL,
NULL, NULL, sample, true)) {
NULL, NULL, NULL, sample, true)) {
pr_warning("problem incrementing symbol period, "
"skipping event\n");
goto out_put;
@@ -442,7 +442,7 @@ static int diff__process_sample_event(struct perf_tool *tool,
break;
default:
if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample,
if (!hists__add_entry(hists, &al, NULL, NULL, NULL, NULL, sample,
true)) {
pr_warning("problem incrementing symbol period, "
"skipping event\n");