Re: [RFC][PATCH v2 5/7] taskstats: Improve cumulative CPU timeaccounting

From: Peter Zijlstra
Date: Mon Nov 15 2010 - 12:52:15 EST


On Mon, 2010-11-15 at 18:49 +0100, Martin Schwidefsky wrote:
> > To what purpose?
>
> Is that a trick question? Why do we have tools like "top"? Or process
> accounting? The point is that the quality of the numbers we get right
> now is rather bad, the overhead of scanning /proc is horrendous and
> the 10ms granularity is rather coarse.

But you're not just replacing top, you're adding all kinds of new
accounting crap all over the place.
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