* William Lee Irwin III <[email protected]> wrote: > On Sun, Apr 15, 2007 at 09:20:46PM +0200, Ingo Molnar wrote: > > so Linus was right: this was caused by scheduler starvation. I can > > see one immediate problem already: the 'nice offset' is not divided > > by nr_running as it should. The patch below should fix this but i > > have yet to test it accurately, this change might as well render > > nice levels unacceptably ineffective under high loads. > > I've been suggesting testing CPU bandwidth allocation as influenced by > nice numbers for a while now for a reason. Oh I was very much testing "CPU bandwidth allocation as influenced by nice numbers" - it's one of the basic things i do when modifying the scheduler. An automated tool, while nice (all automation is nice) wouldnt necessarily show such bugs though, because here too it needed thousands of running tasks to trigger in practice. Any volunteers? ;) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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