Messages in this thread | | | Date | Mon, 11 Nov 2013 10:20:17 -0800 | From | Arjan van de Ven <> | Subject | Re: [RFC][PATCH v5 00/14] sched: packing tasks |
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On 11/11/2013 10:18 AM, Catalin Marinas wrote:
> > Even for symmetric configuration, the cost of moving a task to a CPU > includes wake-up cost plus the run-time cost which depends on the > P-state after wake-up (that's much trickier since we can't easily > estimate the cost of a P-state and it may change once you place a task > on it).
yup including cache refill times (assuming you picked C states that flushed the cache, which will be the common case... but even if not, since you're moving at task the likelyhood of cache coldness is high)
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