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| author | Jaswinder Singh Rajput <jaswinder@kernel.org> | 2009-06-23 17:12:49 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-23 21:58:44 +0200 |
| commit | cca03c0aeb18a975abec28df518a2b64ae3e6964 (patch) | |
| tree | a18afb31eb7a9b7afb5ae23727de84bbef7d4401 | |
| parent | b0a28589b2fc9bee8ed83dee006a497d1ce93841 (diff) | |
| download | kernel_samsung_smdk4412-cca03c0aeb18a975abec28df518a2b64ae3e6964.zip kernel_samsung_smdk4412-cca03c0aeb18a975abec28df518a2b64ae3e6964.tar.gz kernel_samsung_smdk4412-cca03c0aeb18a975abec28df518a2b64ae3e6964.tar.bz2 | |
perf stat: Fix verbose for perf stat
Error message should use stderr for verbose (-v), otherwise
message will be lost for:
$ ./perf stat -v <cmd> > /dev/null
For example on AMD bus-cycles event is not available so now
it looks like:
$ ./perf stat -v -e bus-cycles ls > /dev/null
Error: counter 0, sys_perf_counter_open() syscall returned with -1 (Invalid argument)
Performance counter stats for 'ls':
<not counted> bus-cycles
0.006765877 seconds time elapsed.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1245757369.3776.1.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | tools/perf/builtin-stat.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 6d3eeac..5e04fcc 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -109,6 +109,10 @@ static u64 walltime_nsecs_noise; static u64 runtime_cycles_avg; static u64 runtime_cycles_noise; + +#define ERR_PERF_OPEN \ +"Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n" + static void create_perf_stat_counter(int counter) { struct perf_counter_attr *attr = attrs + counter; @@ -119,20 +123,20 @@ static void create_perf_stat_counter(int counter) if (system_wide) { int cpu; - for (cpu = 0; cpu < nr_cpus; cpu ++) { + for (cpu = 0; cpu < nr_cpus; cpu++) { fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0); - if (fd[cpu][counter] < 0 && verbose) { - printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[cpu][counter], strerror(errno)); - } + if (fd[cpu][counter] < 0 && verbose) + fprintf(stderr, ERR_PERF_OPEN, counter, + fd[cpu][counter], strerror(errno)); } } else { attr->inherit = inherit; attr->disabled = 1; fd[0][counter] = sys_perf_counter_open(attr, 0, -1, -1, 0); - if (fd[0][counter] < 0 && verbose) { - printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[0][counter], strerror(errno)); - } + if (fd[0][counter] < 0 && verbose) + fprintf(stderr, ERR_PERF_OPEN, counter, + fd[0][counter], strerror(errno)); } } @@ -168,7 +172,7 @@ static void read_counter(int counter) count[0] = count[1] = count[2] = 0; nv = scale ? 3 : 1; - for (cpu = 0; cpu < nr_cpus; cpu ++) { + for (cpu = 0; cpu < nr_cpus; cpu++) { if (fd[cpu][counter] < 0) continue; |