Andi Kleen wrote:
Shailabh Nagar <[email protected]> writes:
delayacct-blkio.patch
Record time spent by a task waiting for completion of
userspace initiated synchronous block I/O. This can help
determine the right I/O priority for the task.
I think it's a good idea to have such a statistic by default.
Can you add a counter that is summed up in task_struct and reports
in /proc/*/stat so that it could be displayed by top?
Sure. That would make delayacct code simpler too since it could just
read off from task_struct.
This way it would be useful even with "normal" user space.
Yes. Need to resolve the multiple entry point semantic...more in
separate mail.
--Shailabh
-Andi
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