| To: | Andrew Morton <andrewm@xxxxxxxxxx> |
|---|---|
| Subject: | Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) |
| From: | Chris Wedgwood <cw@xxxxxxxx> |
| Date: | Wed, 31 Jan 2001 06:49:11 +1300 |
| Cc: | "David S. Miller" <davem@xxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, "netdev@xxxxxxxxxxx" <netdev@xxxxxxxxxxx> |
| In-reply-to: | <3A76D6A4.2385185E@uow.edu.au>; from andrewm@uow.edu.au on Wed, Jan 31, 2001 at 01:58:44AM +1100 |
| References: | <3A76B72D.2DD3E640@uow.edu.au>, <3A728475.34CF841@uow.edu.au> <3A726087.764CC02E@uow.edu.au> <20010126222003.A11994@vitelus.com> <14966.22671.446439.838872@pizda.ninka.net> <3A76B72D.2DD3E640@uow.edu.au> <14966.47384.971741.939842@pizda.ninka.net> <3A76D6A4.2385185E@uow.edu.au> |
| Sender: | owner-netdev@xxxxxxxxxxx |
| User-agent: | Mutt/1.2.5i |
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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