OProfile
OProfile is an Open-Source project including a statistical tool for performance profiling. OProfile is available inside the Linux distribution itself, or through the IBM SDK for LoP (up-to-date version with full POWER8 support).
OProfile mainly relies on the following commands:
| Command | Purpose |
|---|---|
| ophelp | List available hardware counters |
| operf | Record events |
| opreport | Display performance report |
| opannotate | Annotate source code with events |
Performance Data Collection
Performance data collection is achieved through the ‘operf’ command:
$ operf <binary>
Performance Data Reporting
Performance data reporting is achieved through the ‘opreport’ command:
$ opreport
CPU_CLK_UNHALT...|
. samples| %|
------------------
. 25202 100.000 cg.W.x
CPU_CLK_UNHALT...|
. samples| %|
------------------
. 18509 73.4426 cg.W.x
. 5190 20.5936 libiomp5.so
. 1443 5.7257 no-vmlinux
. 37 0.1468 ld-2.19.so
. 12 0.0476 libifcoremt.so.5
. 7 0.0278 libc-2.19.so
. 2 0.0079 libpthread-2.19.so