Messages in this thread | | | From | justinf@us ... | Date | Mon, 24 Jan 2000 18:20:22 -0500 | Subject | Re: Interesting analysis of linux kernel threading by IBM |
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Hi,
> As has been stated convincingly here (for me, at least) very high > load means a runqueue of at the very most 10, ridiculous overload > gives some 30. So your scheduler (using your own measurements!) > hurts performance except for ridiculous overload (and contrieved > benchmarks).
I couldn't agree more. I worked on two large AIX boxen this year (8- and 12-way S7As with gigs of RAM) which were getting buried under runqueues that ran past 2000 (no typo). The problem was not in our software or in the kernel--it was simply very poor system software design done by others in years past. There is nothing that anyone can or should do to meet such loads; instead, one should look at fixing the broken software design causing them.
Cheers,
Justin Fries justinf@us.ibm.com Raleigh, North Carolina
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