On 10/7/11 6:45 PM, ava...@gmail.com wrote:
Andrew, are you already working on user space patches?
Yes, I'm working. I've attached the draft version.
Generally I'm happy with the direction of these patches. For doing wall
time based profiling we'll need support in perf inject to merge sleep +
cycles events.
Re: examples of why one might need histograms based on various fields in
a dynamic kernel probe:
I might want to add a probe such as:
perf probe --add 'sys_read fd=%di'
perf probe --add 'sys_read%return bytes=$retval'
and expect to find stack traces that are responsible for most I/O calls
based on bytes vs fd vs number of syscalls.
-Arun
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