Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN)

Chris Wedgwood (cw@f00f.org)
Wed, 31 Jan 2001 06:49:11 +1300


On Wed, Jan 31, 2001 at 01:58:44AM +1100, Andrew Morton wrote:

Mount the server rsize=wsize=8192. `cp' a 102,400,000 byte file
from the NFS server to /dev/null. The file is fully cached on
the server. unmount and remount the server between runs to
eliminate client caching. The copy takes 8.654 seconds. That's
11.8 megabytes/sec.

What server are you using here? Using NetApp filers I don't see
anything like this, probably only 8.5MB/s at most and this number is
fairly noisy.

--cw
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