Messages in this thread | | | Date | Mon, 27 Feb 2006 16:31:36 -0500 | From | Shailabh Nagar <> | Subject | Re: [Patch 5/7] synchronous block I/O delays |
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Andi Kleen wrote:
>Shailabh Nagar <nagar@watson.ibm.com> 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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