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perf_counter tools: Clean up builtin-stat.c's do_perfstat()

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[ Impact: cleanup ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-05-29 09:10:54 +02:00
parent c323d95fa4
commit c04f5e5d7b
1 changed files with 67 additions and 49 deletions
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116
Documentation/perf_counter/builtin-stat.c
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@ -109,11 +109,75 @@ static void create_perfstat_counter(int counter)
} }
} }
/*
* Does the counter have nsecs as a unit?
*/
static inline int nsec_counter(int counter)
{
if (event_id[counter] == EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK))
return 1;
if (event_id[counter] == EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK))
return 1;
return 0;
}
/*
* Print out the results of a single counter:
*/
static void print_counter(int counter)
{
__u64 count[3], single_count[3];
ssize_t res;
int cpu, nv;
int scaled;
count[0] = count[1] = count[2] = 0;
nv = scale ? 3 : 1;
for (cpu = 0; cpu < nr_cpus; cpu ++) {
res = read(fd[cpu][counter], single_count, nv * sizeof(__u64));
assert(res == nv * sizeof(__u64));
count[0] += single_count[0];
if (scale) {
count[1] += single_count[1];
count[2] += single_count[2];
}
}
scaled = 0;
if (scale) {
if (count[2] == 0) {
fprintf(stderr, " %14s %-20s\n",
"<not counted>", event_name(counter));
return;
}
if (count[2] < count[1]) {
scaled = 1;
count[0] = (unsigned long long)
((double)count[0] * count[1] / count[2] + 0.5);
}
}
if (nsec_counter(counter)) {
double msecs = (double)count[0] / 1000000;
fprintf(stderr, " %14.6f %-20s (msecs)",
msecs, event_name(counter));
} else {
fprintf(stderr, " %14Ld %-20s (events)",
count[0], event_name(counter));
}
if (scaled)
fprintf(stderr, " (scaled from %.2f%%)",
(double) count[2] / count[1] * 100);
fprintf(stderr, "\n");
}
static int do_perfstat(int argc, const char **argv) static int do_perfstat(int argc, const char **argv)
{ {
unsigned long long t0, t1; unsigned long long t0, t1;
int counter; int counter;
ssize_t res;
int status; int status;
int pid; int pid;
@ -149,55 +213,10 @@ static int do_perfstat(int argc, const char **argv)
argv[0]); argv[0]);
fprintf(stderr, "\n"); fprintf(stderr, "\n");
for (counter = 0; counter < nr_counters; counter++) { for (counter = 0; counter < nr_counters; counter++)
int cpu, nv; print_counter(counter);
__u64 count[3], single_count[3];
int scaled;
count[0] = count[1] = count[2] = 0;
nv = scale ? 3 : 1;
for (cpu = 0; cpu < nr_cpus; cpu ++) {
res = read(fd[cpu][counter],
single_count, nv * sizeof(__u64));
assert(res == nv * sizeof(__u64));
count[0] += single_count[0];
if (scale) {
count[1] += single_count[1];
count[2] += single_count[2];
}
}
scaled = 0;
if (scale) {
if (count[2] == 0) {
fprintf(stderr, " %14s %-20s\n",
"<not counted>", event_name(counter));
continue;
}
if (count[2] < count[1]) {
scaled = 1;
count[0] = (unsigned long long)
((double)count[0] * count[1] / count[2] + 0.5);
}
}
if (event_id[counter] == EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK) ||
event_id[counter] == EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK)) {
double msecs = (double)count[0] / 1000000;
fprintf(stderr, " %14.6f %-20s (msecs)",
msecs, event_name(counter));
} else {
fprintf(stderr, " %14Ld %-20s (events)",
count[0], event_name(counter));
}
if (scaled)
fprintf(stderr, " (scaled from %.2f%%)",
(double) count[2] / count[1] * 100);
fprintf(stderr, "\n");
}
fprintf(stderr, "\n"); fprintf(stderr, "\n");
fprintf(stderr, " Wall-clock time elapsed: %12.6f msecs\n", fprintf(stderr, " Wall-clock time elapsed: %12.6f msecs\n",
(double)(t1-t0)/1e6); (double)(t1-t0)/1e6);
@ -212,7 +231,6 @@ static void skip_signal(int signo)
static const char * const stat_usage[] = { static const char * const stat_usage[] = {
"perf stat [<options>] <command>", "perf stat [<options>] <command>",
"perf stat [<options>] -- <command> [<options>]",
NULL NULL
}; };