mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-14 08:13:56 +08:00
perf stat: Print cache misses as percentage
Before: 113,393,041 cache-references # 83.636 M/sec 7,052,454 cache-misses # 5.202 M/sec After: 112,589,441 cache-references # 87.925 M/sec 6,556,354 cache-misses # 5.823 % misses/hits percentages are more expressive than absolute numbers or rates. (Also prettify the CPUs printout line to not have a trailing whitespace.) Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/n/tip-axm28f43x439bl41zkvfzd63@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
11ba2b85f5
commit
d58f4c82fe
@ -157,6 +157,7 @@ static double stddev_stats(struct stats *stats)
|
||||
struct stats runtime_nsecs_stats[MAX_NR_CPUS];
|
||||
struct stats runtime_cycles_stats[MAX_NR_CPUS];
|
||||
struct stats runtime_branches_stats[MAX_NR_CPUS];
|
||||
struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
|
||||
struct stats walltime_nsecs_stats;
|
||||
|
||||
static int create_perf_stat_counter(struct perf_evsel *evsel)
|
||||
@ -219,10 +220,12 @@ static int read_counter_aggr(struct perf_evsel *counter)
|
||||
*/
|
||||
if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
|
||||
update_stats(&runtime_nsecs_stats[0], count[0]);
|
||||
if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
|
||||
else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
|
||||
update_stats(&runtime_cycles_stats[0], count[0]);
|
||||
if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
|
||||
else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
|
||||
update_stats(&runtime_branches_stats[0], count[0]);
|
||||
else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
|
||||
update_stats(&runtime_cacherefs_stats[0], count[0]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -404,7 +407,7 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
|
||||
return;
|
||||
|
||||
if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
|
||||
fprintf(stderr, " # %10.3f CPUs ",
|
||||
fprintf(stderr, " # %10.3f CPUs",
|
||||
avg / avg_stats(&walltime_nsecs_stats));
|
||||
}
|
||||
|
||||
@ -452,6 +455,15 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
|
||||
|
||||
fprintf(stderr, " # %10.3f %%", ratio);
|
||||
|
||||
} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
|
||||
runtime_cacherefs_stats[cpu].n != 0) {
|
||||
total = avg_stats(&runtime_cacherefs_stats[cpu]);
|
||||
|
||||
if (total)
|
||||
ratio = avg * 100 / total;
|
||||
|
||||
fprintf(stderr, " # %10.3f %%", ratio);
|
||||
|
||||
} else if (runtime_nsecs_stats[cpu].n != 0) {
|
||||
total = avg_stats(&runtime_nsecs_stats[cpu]);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user