On Wed, Oct 23, 2002 at 03:42:48PM +0200, Roy Sigurd Karlsbakk wrote:
quoted
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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