RE: some bad numbers with Java/database threading

2007-09-13 Thread David Schwartz
First, let me apologize if the tone of my other post came through as angry or frustrated. Text can sometimes be misleading as to tone. I certainly wasn't angry. Second, let me say that I'm definitely not suggesting that you were wrong to bring this to everyone's attention. Even if it turns out

Re: some bad numbers with Java/database threading

2007-09-13 Thread Antoine Martin
-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 I've tested a couple more kernels: 2.6.23-rc4-mm1 and 2.6.23-rc6 with the "sched_yield_bug_workaround" patch from Ingo, results are here: http://devloop.org.uk/documentation/database-performance/Linux-Kernels/Kernels-ManyThreads-CombinedTests3-10msYi

Re: some bad numbers with Java/database threading

2007-09-13 Thread Nick Piggin
On Thursday 13 September 2007 17:18, David Schwartz wrote: > > I was working on some unit tests and thought I'd give CFS a whirl to see > > if it had any impact on my workloads (to see what the fuss was about), > > and I came up with some pretty disturbing numbers: > > http://devloop.org.uk/documen

RE: some bad numbers with Java/database threading

2007-09-13 Thread David Schwartz
> I was working on some unit tests and thought I'd give CFS a whirl to see > if it had any impact on my workloads (to see what the fuss was about), > and I came up with some pretty disturbing numbers: > http://devloop.org.uk/documentation/database-performance/Linux-Ker > nels/Kernels-ManyThreads-C