stackcollapse-perf.pl: Use event period to count folded stack #289
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This perf command [1] using frequency can get a relatively stable size of sample data, while the event period is dynamically adjusted by kernel. The sample number can not reflect true percentage of event occurence, so period should be involved. [1]: perf record -F 99 -a -g -- sleep 60 Signed-off-by: Peng Wang <rocking@linux.alibaba.com>
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Duplicated by #165 |
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This perf command [1] using frequency can get a relatively
stable size of sample data, while the event period is dynamically
adjusted by kernel.
The sample number can not reflect true percentage of event
occurence, so period should be involved.
[1]: perf record -F 99 -a -g -- sleep 60
Signed-off-by: Peng Wang rocking@linux.alibaba.com