Re: Got iperf regression while intel_iommu is on, how to cut the costof cache flushing

[Ethan Zhao]

Jiang,
    Could you help to take a look such performance issue about Intel
IOMMU, seems you go back  this field of Intel.  Is it possible to
eliminate the performance side effect of mapping and unmapping
operation ? some context information, please refer to the first mail
of this loop.

Thanks,
Ethan
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