Messages in this thread | | | Date | Wed, 23 Oct 2002 19:01:02 +0200 | From | bert hubert <> | Subject | Re: [RESEND] tuning linux for high network performance? |
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On Wed, Oct 23, 2002 at 03:42:48PM +0200, Roy Sigurd Karlsbakk wrote: > > The e1000 can very well do hardware checksumming on transmit. > > > > The missing piece of the puzzle is that his application is not > > using sendfile(), without which no transmit checksum offload > > can take place. > > As far as I've understood, sendfile() won't do much good with large files. Is > this right?
I still refuse to believe that a 1.8GHz Pentium4 can only checksum 250megabits/second. MD Raid5 does better and they probably don't use a checksum as braindead as that used by TCP.
If the checksumming is not the problem, the copying is, which would be a weakness of your hardware. The function profiled does both the copying and the checksumming.
But 250megabits/second also seems low.
Dave?
Regards,
bert
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