[Beowulf] Re: Re: Re: Home beowulf - NIC latencies (Patrick Geoffray)

Andrew Piskorski atp at piskorski.com
Fri Feb 18 04:45:28 PST 2005

On Tue, Feb 15, 2005 at 10:28:10AM +0100, Ole W. Saastad wrote:

> Patrick Geoffray wrote:
> > The one with the best potential would be to use HyperThreading on
> > Intel chips to have a polling thread burning cycles continuously;

> The simple finding is that the kinetics program got somewhat more 
> than 70% of the CPU cycles and that the polling waisted close to
> 30% of the CPU cycles, 30% is not for free.

Using what Linux kernel?  Using what feature to tell the kernel,
"Please run this polling process only on the extra HyperThreaded
virtual CPU, never on the real CPU." ?

Andrew Piskorski <atp at piskorski.com>

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