perf
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perf [2018-05-02 12:37:41] |
perf [2018-05-02 12:37:41] (current) |
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| + | ====== perf on low-end hardware ====== | ||
| + | If perf binary is not available: | ||
| + | * copy the tools/ directory of the current running kernel tree | ||
| + | * apt-get install flex bison libc-dev libc-dev libelf-dev libslang2-dev libunwind-dev binutils-dev libiberty-dev | ||
| + | * make -C tools/perf/ | ||
| + | |||
| + | If hardware performance counters are not available: | ||
| + | <code> | ||
| + | # ./linux/tools/perf/perf record -a factor 2365873330313 | ||
| + | Error: | ||
| + | PMU Hardware doesn't support sampling/overflow-interrupts. | ||
| + | /o\ | ||
| + | </code> | ||
| + | |||
| + | Then use software cpu-clock event instead: | ||
| + | <code> | ||
| + | # /root/linux/tools/perf/perf record -e cpu-clock -a factor 2365873330313 | ||
| + | 2365873330313: 4567 518036639 | ||
| + | [ perf record: Woken up 1 times to write data ] | ||
| + | [ perf record: Captured and wrote 0.119 MB perf.data (152 samples) ] | ||
| + | \o/ | ||
| + | </code> | ||
perf.txt ยท Last modified: 2018-05-02 12:37:41 (external edit)
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