|To:||Andrew Morton <andrewm@xxxxxxxxxx>|
|Subject:||Re: Hardware IP checksums|
|From:||Artur Skawina <skawina@xxxxxxxxxxxxx>|
|Date:||Mon, 24 Apr 2000 19:12:34 +0200|
> It appeared pretty useless. Jes noticed this first time, > I had to check this experimentally, and yes... No visible improvements. > HW checksum on transmit looks really not useful without zero copy. for example on p2 the extra checksumming cost (vs a plain copy) is ~7%, and that's the worst case, ie everything cached. Add cache misses and the difference won't be visible...
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