diff options
| author | Arnaldo Carvalho de Melo <[email protected]> | 2009-05-26 19:20:57 -0300 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2009-05-27 09:10:35 +0200 |
| commit | d8d1656ee15d3085e0085a87e70f9093a0a102c5 (patch) | |
| tree | e16d2f8db17e2c805d4c5a1bd3b2c6c435ed1fd4 /include/linux/stackprotector.h | |
| parent | 3a4b8cc70b7473a0b9f26f5b4ddc6579b5e214be (diff) | |
perf report: Use hex2long instead of sscanf
Before:
[acme@emilia ~]$ perf record -o perf_report.perf perf stat perf report > /dev/null
Performance counter stats for 'perf':
245.414985 task clock ticks (msecs)
6 context switches (events)
6 CPU migrations (events)
2108 pagefaults (events)
37493013 CPU cycles (events) (scaled from 67.04%)
13576789 instructions (events) (scaled from 66.76%)
57931 cache references (events) (scaled from 21.96%)
12263 cache misses (events) (scaled from 21.98%)
Wall-clock time elapsed: 246.575587 msecs
[acme@emilia ~]$ perf report -i perf_report.perf | head
12.15 perf [.] 0x000000000005432a /lib64/libc-2.5.so: _IO_vfscanf_internal
9.38 perf [k] 0xffffffff8101b1d2 intel_pmu_enable_all
8.53 perf [.] 0x00000000000056b8 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__insert_symbol
6.61 perf [.] 0x00000000000057cb /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__find_symbol
5.33 perf [k] 0xffffffff811ce082 number
4.69 perf [.] 0x0000000000034829 /lib64/libc-2.5.so: ____strtoull_l_internal
4.48 perf [.] 0x0000000000006505 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: thread__symbol_incnew
3.41 perf [.] 0x000000000000fce6 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: rb_insert_color
3.20 perf [k] 0xffffffff811cfc01 vsnprintf
2.99 perf [k] 0xffffffff811ce5e8 format_decode
After:
[acme@emilia ~]$ perf record -o perf_report.perf perf stat perf report > /dev/null
Performance counter stats for 'perf':
218.186805 task clock ticks (msecs)
4 context switches (events)
7 CPU migrations (events)
2133 pagefaults (events)
32735365 CPU cycles (events) (scaled from 67.04%)
11952309 instructions (events) (scaled from 66.26%)
50314 cache references (events) (scaled from 21.96%)
13228 cache misses (events) (scaled from 21.98%)
Wall-clock time elapsed: 218.810451 msecs
[acme@emilia ~]$ perf report -i perf_report.perf | head
10.68 perf [.] 0x000000000000578d /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__find_symbol
9.62 perf [.] 0x00000000000065f7 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: thread__symbol_incnew
9.40 perf [.] 0x00000000000056b4 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: dso__insert_symbol
9.19 perf [k] 0xffffffff8101b1d2 intel_pmu_enable_all
5.13 perf [.] 0x0000000000005ec7 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: hex2long
4.49 perf [k] 0xffffffff81083808 kallsyms_expand_symbol
3.85 perf [k] 0xffffffff811ce2c1 number
3.63 perf [.] 0x0000000000005e81 /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: hex
2.99 perf [.] 0x000000000000fd5b /home/acme/git/linux-2.6-tip/Documentation/perf_counter/perf: rb_insert_color
2.99 perf [k] 0xffffffff811cf251 string
[acme@emilia ~]$
[ Impact: optimization ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: Marcelo Tosatti <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: John Kacur <[email protected]>
Cc: Steven Rostedt <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'include/linux/stackprotector.h')
0 files changed, 0 insertions, 0 deletions