From: Arnaldo Carvalho de Melo Date: Tue, 26 May 2009 22:20:57 +0000 (-0300) Subject: perf report: Use hex2long instead of sscanf X-Git-Tag: v2.6.31-rc1~383^2~192 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d8d1656ee15d3085e0085a87e70f9093a0a102c5;p=pandora-kernel.git 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 Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Corey Ashford Cc: Marcelo Tosatti Cc: Thomas Gleixner Cc: John Kacur Cc: Steven Rostedt LKML-Reference: <20090526222057.GI4424@ghostprotocols.net> Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed