Messages in this thread | | | Date | Wed, 18 May 2022 15:59:34 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/4] sched/numa: Apply imbalance limitations consistently |
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On Wed, May 18, 2022 at 11:46:52AM +0100, Mel Gorman wrote:
> > (Although I do wonder about that 25% figure in the comment; that doesn't > > seem to relate to any actual code anymore) > > > > You're right, by the end of the series it's completely inaccurate and > currently it's not accurate if there are multiple LLCs per node. I > adjusted the wording to "Allow a NUMA imbalance if busy CPUs is less > than the maximum threshold. Above this threshold, individual tasks may > be contending for both memory bandwidth and any shared HT resources." >
Looks good. Meanwhile I saw a 0-day complaint that this regresses something something unixbench by a bit. Do we care enough? I suppose this is one of those trade-off patches again, win some, loose some.
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