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[Xen-devel] [PATCH 0 of 2] credit2: Reduce excessive cpu migration
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| Subject: | [Xen-devel] [PATCH 0 of 2] credit2: Reduce excessive cpu migration |
| From: | George Dunlap <george.dunlap@xxxxxxxxxxxxx> |
| Date: | Thu, 9 Dec 2010 17:55:15 +0000 |
| Cc: | george.dunlap@xxxxxxxxxxxxx |
| Delivery-date: | Thu, 09 Dec 2010 10:07:07 -0800 |
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More recent processors have one L2 per core. My plan for the credit2 scheduler invovled having several cores sharing the same runqueue. I've measured the cost of excessive cross-L2 intra-L3 migrations, and while they're not excessive, they are measurable. This patch series introduces some simple heuristics to reduce unnecessary migration. As in all the Credit2 work, this is a first cut, and I'm sure there are further improvments. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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