On Thu, 13 Jul 2000, Stephen McKay wrote:
>>Guess it will show up if you measure latencies (or your application is
>>doing lots of RPCs). But as soon as there is a cheap 100baseT switch in
>>the path to the destination, there will be store-and-forward at work ;-)
>
>Does anyone here actually measure these latencies? I know for a fact
>that nothing I've ever done would or could be affected by extra latencies
>that are as small as the ones we are discussing. Does anybody at all
>depend on the start-transmitting-before-DMA-completed feature we are
>discussing?
I don't like the idea of removing that feature. Perhaps it should be a
sysctl or ifconfig option, but it should definitely remain available.
Those minute latencies are critical to those of us who use MPI for
complex parallel calculations.
Brandon D. Valentine
--
bandix at looksharp.net | bandix at structbio.vanderbilt.edu
"Truth suffers from too much analysis." -- Ancient Fremen Saying
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