diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-11-28 23:57:40 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-11-28 23:57:40 +0400 |
| commit | ee29be625bd7b115d45eba4b0526ff3e24bf3ca0 (patch) | |
| tree | 1ef1189e0fe02511642e5f74f463d888dfa34bec /tools/perf/util/tool.h | |
| parent | e7984b7bee2fca8f582f5bc2bf1e6c93420a5dd5 (diff) | |
| download | linux-ee29be625bd7b115d45eba4b0526ff3e24bf3ca0.tar.xz | |
perf tools: Save some loops using perf_evlist__id2evsel
Since we already ask for PERF_SAMPLE_ID and use it to quickly find the
associated evsel, add handler func + data to struct perf_evsel to avoid
using chains of if(strcmp(event_name)) and also to avoid all the linear
list searches via trace_event_find.
To demonstrate the technique convert 'perf sched' to it:
# perf sched record sleep 5m
And then:
Performance counter stats for '/tmp/oldperf sched lat':
646.929438 task-clock # 0.999 CPUs utilized
9 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
20,901 page-faults # 0.032 M/sec
1,290,144,450 cycles # 1.994 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1,606,158,439 instructions # 1.24 insns per cycle
339,088,395 branches # 524.151 M/sec
4,550,735 branch-misses # 1.34% of all branches
0.647524759 seconds time elapsed
Versus:
Performance counter stats for 'perf sched lat':
473.564691 task-clock # 0.999 CPUs utilized
9 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
20,903 page-faults # 0.044 M/sec
944,367,984 cycles # 1.994 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
1,442,385,571 instructions # 1.53 insns per cycle
308,383,106 branches # 651.195 M/sec
4,481,784 branch-misses # 1.45% of all branches
0.474215751 seconds time elapsed
[root@emilia ~]#
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-1kbzpl74lwi6lavpqke2u2p3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/tool.h')
| -rw-r--r-- | tools/perf/util/tool.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h index 89ff1b551a74..b0e1aadba8d5 100644 --- a/tools/perf/util/tool.h +++ b/tools/perf/util/tool.h @@ -1,8 +1,13 @@ #ifndef __PERF_TOOL_H #define __PERF_TOOL_H +#include <stdbool.h> + struct perf_session; +union perf_event; +struct perf_evlist; struct perf_evsel; +struct perf_sample; struct perf_tool; struct machine; |