Re: [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks
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On 05/07/2012 07:19 PM, Avi Kivity wrote:
On 05/07/2012 04:46 PM, Srivatsa Vaddagiri wrote:* Raghavendra K T<raghavendra.kt@xxxxxxxxxxxxxxxxxx> [2012-05-07 19:08:51]:I 'll get hold of a PLE mc and come up with the numbers soon. but I 'll expect the improvement around 1-3% as it was in last version.Deferring preemption (when vcpu is holding lock) may give us better than 1-3% results on PLE hardware. Something worth trying IMHO.Is the improvement so low, because PLE is interfering with the patch, or because PLE already does a good job?
It is because PLE already does a good job (of not burning cpu). The 1-3% improvement is because, patchset knows atleast who is next to hold lock, which is lacking in PLE. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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