Messages in this thread |  | | Subject | Re: zero-copy TCP | From | Jes Sorensen <> | Date | 04 Sep 2000 17:17:17 +0200 |
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>>>>> "Jamie" == Jamie Lokier <lk@tantalophile.demon.co.uk> writes:
Jamie> Nice point! Only valid for TCP & UDP though.
Jamie> When people want _real_ low latency, they don't use TCP or UDP, Jamie> and they certainly don't put data checksums at the start. They Jamie> still aim for zero copies. That pass, even over cached data, Jamie> is still significant.
In this case you really want to do a user space driver implementation to avoid the cost of context switches. This is how a lot of people use the Myrinet (afaik) and there were also some of the guys at CERN who did a similar driver for the AceNIC at the same time I wrote the first version of the 'normal' driver.
Jes
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