diff options
author | Stephane Eranian <eranian@google.com> | 2010-05-18 15:00:01 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-18 23:03:22 -0300 |
commit | 5af52b51f76d8f8dce0e5b2a33c20b2231c8046d (patch) | |
tree | ca343ead7bb18f7ad69da2fb4fd4c5e1dcd5d3b1 /tools | |
parent | a13c3afd9b62b6dace80654964cc4ca7d2db8092 (diff) | |
download | kernel_samsung_smdk4412-5af52b51f76d8f8dce0e5b2a33c20b2231c8046d.zip kernel_samsung_smdk4412-5af52b51f76d8f8dce0e5b2a33c20b2231c8046d.tar.gz kernel_samsung_smdk4412-5af52b51f76d8f8dce0e5b2a33c20b2231c8046d.tar.bz2 |
perf stat: add perf stat -B to pretty print large numbers
It is hard to read very large numbers so provide an option to perf stat
to separate thousands using a separator. The patch leverages the locale
support of stdio. You need to set your LC_NUMERIC appropriately, for
instance LC_NUMERIC=en_US.UTF8. You need to pass -B to activate this
feature. This way existing scripts parsing the output do not need to be
changed. Here is an example.
$ perf stat noploop 2
noploop for 2 seconds
Performance counter stats for 'noploop 2':
1998.347031 task-clock-msecs # 0.998 CPUs
61 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
118 page-faults # 0.000 M/sec
4,138,410,900 cycles # 2070.917 M/sec (scaled from 70.01%)
2,062,650,268 instructions # 0.498 IPC (scaled from 70.01%)
2,057,653,466 branches # 1029.678 M/sec (scaled from 70.01%)
40,267 branch-misses # 0.002 % (scaled from 30.04%)
2,055,961,348 cache-references # 1028.831 M/sec (scaled from 30.03%)
53,725 cache-misses # 0.027 M/sec (scaled from 30.02%)
2.001393933 seconds time elapsed
$ perf stat -B noploop 2
noploop for 2 seconds
Performance counter stats for 'noploop 2':
1998.297883 task-clock-msecs # 0.998 CPUs
59 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
119 page-faults # 0.000 M/sec
4,131,380,160 cycles # 2067.450 M/sec (scaled from 70.01%)
2,059,096,507 instructions # 0.498 IPC (scaled from 70.01%)
2,054,681,303 branches # 1028.216 M/sec (scaled from 70.01%)
25,650 branch-misses # 0.001 % (scaled from 30.05%)
2,056,283,014 cache-references # 1029.017 M/sec (scaled from 30.03%)
47,097 cache-misses # 0.024 M/sec (scaled from 30.02%)
2.001391016 seconds time elapsed
Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <4bf28fe8.914ed80a.01ca.fffff5f5@mx.google.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/Documentation/perf-stat.txt | 3 | ||||
-rw-r--r-- | tools/perf/builtin-stat.c | 18 |
2 files changed, 17 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 2cab8e8..909fa76 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -43,6 +43,9 @@ OPTIONS -c:: scale counter values +-B:: + print large numbers with thousands' separators according to locale + EXAMPLES -------- diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index ff8c413..9a39ca3 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -50,6 +50,7 @@ #include <sys/prctl.h> #include <math.h> +#include <locale.h> static struct perf_event_attr default_attrs[] = { @@ -80,6 +81,8 @@ static pid_t *all_tids = NULL; static int thread_num = 0; static pid_t child_pid = -1; static bool null_run = false; +static bool big_num = false; + static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; @@ -377,7 +380,7 @@ static void nsec_printout(int counter, double avg) { double msecs = avg / 1e6; - fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter)); + fprintf(stderr, " %18.6f %-24s", msecs, event_name(counter)); if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) { fprintf(stderr, " # %10.3f CPUs ", @@ -389,7 +392,10 @@ static void abs_printout(int counter, double avg) { double total, ratio = 0.0; - fprintf(stderr, " %14.0f %-24s", avg, event_name(counter)); + if (big_num) + fprintf(stderr, " %'18.0f %-24s", avg, event_name(counter)); + else + fprintf(stderr, " %18.0f %-24s", avg, event_name(counter)); if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) { total = avg_stats(&runtime_cycles_stats); @@ -426,7 +432,7 @@ static void print_counter(int counter) int scaled = event_scaled[counter]; if (scaled == -1) { - fprintf(stderr, " %14s %-24s\n", + fprintf(stderr, " %18s %-24s\n", "<not counted>", event_name(counter)); return; } @@ -477,7 +483,7 @@ static void print_stat(int argc, const char **argv) print_counter(counter); fprintf(stderr, "\n"); - fprintf(stderr, " %14.9f seconds time elapsed", + fprintf(stderr, " %18.9f seconds time elapsed", avg_stats(&walltime_nsecs_stats)/1e9); if (run_count > 1) { fprintf(stderr, " ( +- %7.3f%% )", @@ -534,6 +540,8 @@ static const struct option options[] = { "repeat command and print average + stddev (max: 100)"), OPT_BOOLEAN('n', "null", &null_run, "null run - dont start any counters"), + OPT_BOOLEAN('B', "big-num", &big_num, + "print large numbers with thousands\' separators"), OPT_END() }; @@ -542,6 +550,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) int status; int i,j; + setlocale(LC_ALL, ""); + argc = parse_options(argc, argv, options, stat_usage, PARSE_OPT_STOP_AT_NON_OPTION); if (!argc && target_pid == -1 && target_tid == -1) |