clock_gettime_mono in the VFS.

Volker Lendecke Volker.Lendecke at SerNet.DE
Sun Mar 6 15:49:00 UTC 2016

On Fri, Mar 04, 2016 at 01:18:20PM -0500, Ira Cooper wrote:
> Note: I expect over-time, this type of profiling will go down in
> usefulness.  Linux tools to do this type of measurement are improving
> quickly, and dtrace can do it fairly well on other platforms.

Is there a way to measure the exact time spent in the filesystem
syscalls? In production systems we need to know where to look for
problems. Samba, ctdb, or kernel below. So this needs to run continuously,
as reproducers are normally not possible.

So, please advise how to monitor that continuously for production.



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