Lustre discuss - May 2006 - socknal zero copy?

On Nov 28, 2005  20:52 +0800, sky wrote:
> Is zero-copy enabled when we working with lustre-1.4.5 under default
> socknal config?I donn''t know much about how it works.It seems CFS
patched
> linux kernel. Can it improve performace on IP over IB or IP over some
> other network?
Yes, the TCP zero copy was implemented by CFS for the 2.4 kernel.  There
is no equivalent support in the 2.6 kernel.  It is only active for 2.4
kernels that are patched and NICs that support TCP checksum and scatter-
gather operations.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

Is zero-copy enabled when we working with lustre-1.4.5 under default socknal
config?I donn''t know much about how it works.It seems CFS patched linux
kernel. Can it improve performace on IP over IB or IP over some other network?





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