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perf hist: Count the total cycles of all samples 

We can get the per sample cycles by hist__account_cycles(). It's also
useful to know the total cycles of all samples in order to get the
cycles coverage for a single program block in further. For example:

  coverage = per block sampled cycles / total sampled cycles

This patch creates a new argument 'total_cycles' in hist__account_cycles(),
which will be added with the cycles of each sample.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191107074719.26139-4-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2019-11-07 15:47:15 +08:00 committed by Arnaldo Carvalho de Melo
parent 6041441870
commit 7841f40aed
6 changed files with 13 additions and 6 deletions
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2
tools/perf/builtin-annotate.c
View File

@ -201,7 +201,7 @@ static int process_branch_callback(struct evsel *evsel,
if (a.map != NULL)
a.map->dso->hit = 1;
hist__account_cycles(sample->branch_stack, al, sample, false);
hist__account_cycles(sample->branch_stack, al, sample, false, NULL);
ret = hist_entry_iter__add(&iter, &a, PERF_MAX_STACK_DEPTH, ann);
return ret;

3
tools/perf/builtin-diff.c
View File

@ -426,7 +426,8 @@ static int diff__process_sample_event(struct perf_tool *tool,
goto out_put;
}
hist__account_cycles(sample->branch_stack, &al, sample, false);
hist__account_cycles(sample->branch_stack, &al, sample, false,
NULL);
}
/*

2
tools/perf/builtin-report.c
View File

@ -292,7 +292,7 @@ static int process_sample_event(struct perf_tool *tool,
if (ui__has_annotation() || rep->symbol_ipc) {
hist__account_cycles(sample->branch_stack, &al, sample,
rep->nonany_branch_mode);
rep->nonany_branch_mode, NULL);
}
ret = hist_entry_iter__add(&iter, &al, rep->max_stack, rep);

3
tools/perf/builtin-top.c
View File

@ -725,7 +725,8 @@ static int hist_iter__top_callback(struct hist_entry_iter *iter,
perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr);
hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
!(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
!(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),
NULL);
return 0;
}

6
tools/perf/util/hist.c
View File

@ -2572,7 +2572,8 @@ int hists__unlink(struct hists *hists)
}
void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
struct perf_sample *sample, bool nonany_branch_mode)
struct perf_sample *sample, bool nonany_branch_mode,
u64 *total_cycles)
{
struct branch_info *bi;
@ -2599,6 +2600,9 @@ void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
nonany_branch_mode ? NULL : prev,
bi[i].flags.cycles);
prev = &bi[i].to;
if (total_cycles)
*total_cycles += bi[i].flags.cycles;
}
free(bi);
}

3
tools/perf/util/hist.h
View File

@ -527,7 +527,8 @@ unsigned int hists__sort_list_width(struct hists *hists);
unsigned int hists__overhead_width(struct hists *hists);
void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
struct perf_sample *sample, bool nonany_branch_mode);
struct perf_sample *sample, bool nonany_branch_mode,
u64 *total_cycles);
struct option;
int parse_filter_percentage(const struct option *opt, const char *arg, int unset);