Messages in this thread | | | Date | Thu, 24 Nov 2005 17:24:34 +0200 | From | Avi Kivity <> | Subject | Re: [RFC] [PATCH 0/3] ioat: DMA engine support |
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Andi Kleen wrote:
>>Don't forget that there are benefits of not polluting the cache with the >>traffic for the incoming skbs. >> >> > >Is that a general benefit outside benchmarks? I would expect >most real programs to actually do something with the data >- and that usually involves needing it in cache. > > > As an example, an NFS server reads some data pages using iSCSI and sends them using NFS/TCP (or vice versa).
>>In the I/O AT case it might make sense to do a few prefetch()es of the >>userland data on the return-to-userspace code path. >> >> > >Some prefetches for user space might be a good idea yes > > > As long as they can be turned off. Not all usespace applications want to touch the data immediately.
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