perf_counter: some simple userspace profiling
# perf-record make -j4 kernel/
# perf-report | tail -15
0.39 cc1 [kernel] lock_acquired
0.42 cc1 [kernel] lock_acquire
0.51 cc1 [ user ] /lib64/libc-2.8.90.so: _int_free
0.51 as [kernel] clear_page_c
0.53 cc1 [ user ] /lib64/libc-2.8.90.so: memcpy
0.56 cc1 [ user ] /lib64/libc-2.8.90.so: _IO_vfprintf
0.63 cc1 [kernel] lock_release
0.67 cc1 [ user ] /lib64/libc-2.8.90.so: strlen
0.68 cc1 [kernel] debug_smp_processor_id
1.38 cc1 [ user ] /lib64/libc-2.8.90.so: _int_malloc
1.55 cc1 [ user ] /lib64/libc-2.8.90.so: memset
1.77 cc1 [kernel] __lock_acquire
1.88 cc1 [kernel] clear_page_c
3.61 as [ user ] /usr/bin/as: <unknown>
59.16 cc1 [ user ] /usr/libexec/gcc/x86_64-redhat-linux/4.3.2/cc1: <unknown>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
LKML-Reference: <20090408130409.220518450@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
3 files changed