[Beowulf] Racing kernels
steve_heaton at ozemail.com.au
Mon Apr 4 01:04:55 PDT 2005
Is anyone out there running a "racing" kernel on their nodes?
By "racing" I mean removing all unnecessary components (SCSI, USB et
al), tweaked buffer values, pre-empting, stripped, helium filled,
brushed aluminum etc?
Yes, it's a loaded question. I'm contemplating performance tweaking when
I realized that there's a bucket load of stuff in the default kernel
config I don't need.
Now anyone that's ever been exposed to that strange subspecies known as
"overclockers" knows you can go to ridiculous lengths ("Duuude, it's
fully sick, I can get another 2.3MHz if I take the box outside and hit
it with a hose").
I'd like to think we're giving priority to stability. But still... I
think there's scope for "safe" improvement?
Also need to include the type of target app(s) I s'pose. My Nbody apps
are smokin' math stuff but the IO is quite light. So there'd be a fair
range of variation in "optimal" config I'd imagine.
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