RE: Re[2]: [Haskell-cafe] Substring replacements

From: Bulat Ziganshin Reply-To: Bulat Ziganshin To: "Branimir Maksimovic" CC: daniel.is.fischer@web.de, Haskell-Cafe@haskell.org Subject: Re[2]: [Haskell-cafe] Substring replacements Date: Fri, 16 Dec 2005 16:51:32 +0300

Hello Branimir,

Friday, December 16, 2005, 5:36:47 AM, you wrote: BM> I've also performed tests on dual Xeon linux box and results are

just to let you know - GHC don't uses pentium4 hyperthreading, multiple cpus or multiple cores in these tests

only way to make ghc using multiple processors is to use 6.5 beta version, compile with "-smp" and explicitly fork several threads

You are right. I've double checked on linux there is just one thread executing and there is not such a big difference between KMP and straightforward search. Just about 10% KMP is faster with my test, but still faster. I've checked both SMP and non SMP linux (Intel). Hyperthreading effect is on windows only, I guess, as there are visible three threads per test process. I have one amd64 near (I'll check that one too, as soon as admin sets up account for me on that machine). Greetings, Bane. _________________________________________________________________ Don't just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/