[Xen-devel] How to get the cache miss ratio of Guest VM

[gavin <gbtux@xxxxxxx>]

Hi George,

I noticed that the credit2 scheduling algorithm has one runqueue every L2 cache that is shared by cores in one socket. If vCPUs, which need to communicate more with each other, are assigned to the cores sharing the same L2 cache, the L2 cache miss ratio of Guest VM may be reduced. And also, the performance of the Guest VM will be improved. Is it right? But, how to test the cache miss ratio of L2 in Guest VM? Are the tools that used to test the cache miss ratio in non-virtualized environment can be used in Xen Guest VM?

Thank you very much.

--
Best Regards,

Gavin

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