diff options
| -rw-r--r-- | Documentation/perf_counter/builtin-stat.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/Documentation/perf_counter/builtin-stat.c b/Documentation/perf_counter/builtin-stat.c index 6a2936150f2..0c92eb72552 100644 --- a/Documentation/perf_counter/builtin-stat.c +++ b/Documentation/perf_counter/builtin-stat.c @@ -71,6 +71,9 @@ static const unsigned int default_count[] = { 10000, }; +static __u64 event_res[MAX_COUNTERS][3]; +static __u64 event_scaled[MAX_COUNTERS]; + static void create_perfstat_counter(int counter) { struct perf_counter_hw_event hw_event; @@ -123,16 +126,19 @@ static inline int nsec_counter(int counter) } /* - * Print out the results of a single counter: + * Read out the results of a single counter: */ -static void print_counter(int counter) +static void read_counter(int counter) { - __u64 count[3], single_count[3]; + __u64 *count, single_count[3]; ssize_t res; int cpu, nv; int scaled; + count = event_res[counter]; + 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)); @@ -148,16 +154,35 @@ static void print_counter(int counter) scaled = 0; if (scale) { if (count[2] == 0) { - fprintf(stderr, " %14s %-20s\n", - "<not counted>", event_name(counter)); + event_scaled[counter] = -1; + count[0] = 0; return; } + if (count[2] < count[1]) { - scaled = 1; + event_scaled[counter] = 1; count[0] = (unsigned long long) ((double)count[0] * count[1] / count[2] + 0.5); } } +} + +/* + * Print out the results of a single counter: + */ +static void print_counter(int counter) +{ + __u64 *count; + int scaled; + + count = event_res[counter]; + scaled = event_scaled[counter]; + + if (scaled == -1) { + fprintf(stderr, " %14s %-20s\n", + "<not counted>", event_name(counter)); + return; + } if (nsec_counter(counter)) { double msecs = (double)count[0] / 1000000; @@ -214,6 +239,9 @@ static int do_perfstat(int argc, const char **argv) fprintf(stderr, "\n"); for (counter = 0; counter < nr_counters; counter++) + read_counter(counter); + + for (counter = 0; counter < nr_counters; counter++) print_counter(counter); |