Re: [Patch 0/7] Per-task delay accounting

Nick Piggin
2006-02-27T09:10:47Z

Shailabh Nagar wrote:
> The following patches add accounting for the delays seen by tasks in
> a) waiting for a CPU (while being runnable)
> b) completion of synchronous block I/O initiated by the task
> c) swapping in pages (i.e. capacity misses).
>
> Such delays provide feedback for a task's cpu priority, io priority and
> rss limit values. Long delays, especially relative to other tasks, can
> be a trigger for changing a task's cpu/io priorities and modifying its
> rss usage (either directly through sys_getprlimit() that was proposed
> earlier on lkml or by throttling cpu consumption or process calling
> sys_setrlimit etc.)
>

Can we get an idea about the actual userspace programs and algorithms
that use this feedback? Links, performance numbers, etc.

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