On Fri, Jul 27, 2012 at 10:41 AM, Erik van der Werf <erikvanderw...@gmail.com> wrote: > Ok, so what if the closest I can get is a 6-core i7. How many threads may I > start on that one?
I guess you should make sure that it uses only 4 cores and you can start as many threads as you want. Your BIOS should allow you to disable cores. You can also set thread affinity so that they don't use 2 cores. If you can't do either of those I'm afraid the rules forbid to use that particular machine in Kas Cup with more than 4 threads. > > Erik > > > On Fri, Jul 27, 2012 at 6:48 PM, Łukasz Lew <lukasz....@gmail.com> wrote: >> >> On Fri, Jul 27, 2012 at 2:15 AM, Erik van der Werf >> <erikvanderw...@gmail.com> wrote: >> > Lukasz' current rule gives a big advantage to i7 (low core count, 2 >> > threads >> > per core, high clock rate, all the opposite for Opteron systems). In my >> > experience performance per thread per GHz for a fully loaded system is >> > quite >> > similar for a wide range of processor types (I tested this for Opteron, >> > i7 >> > and an older core2). >> >> These rules are a compromise between simplicity and the goal, which is >> to measure algorithms instead of hardware. >> Most important effect of limiting of number of cores is to cut a huge >> advantage of using big clusters. >> I am less concerned about relatively minor differences of architectures or >> GHz. >> >> >> > >> > Erik >> > >> > >> > On Fri, Jul 27, 2012 at 7:31 AM, David Fotland <fotl...@smart-games.com> >> > wrote: >> >> >> >> 2 threads is not worth nearly as much as two cores. >> >> >> >> >> >> >> >> David >> >> >> >> >> >> >> >> From: computer-go-boun...@dvandva.org >> >> [mailto:computer-go-boun...@dvandva.org] On Behalf Of Erik van der Werf >> >> Sent: Thursday, July 26, 2012 2:09 PM >> >> >> >> >> >> To: computer-go@dvandva.org >> >> Subject: Re: [Computer-go] Kas Cup >> >> >> >> >> >> >> >> On Wed, Jul 11, 2012 at 6:43 PM, Łukasz Lew <lukasz....@gmail.com> >> >> wrote: >> >> >> >> > I'm assuming that hyperthreading is OK, so a core i7 would count as 4 >> >> > cores, but use 8 threads. >> >> >> >> Yes. >> >> >> >> >> >> >> >> So what about AMD cores? What about overclocking? >> >> >> >> >> >> >> >> I think limiting on nr_of_threads X clock_rate would be more fair. >> >> >> >> >> >> >> >> Erik >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> >> Computer-go mailing list >> >> Computer-go@dvandva.org >> >> http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >> > >> > >> > >> > _______________________________________________ >> > Computer-go mailing list >> > Computer-go@dvandva.org >> > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >> >> >> >> -- >> Łukasz >> _______________________________________________ >> Computer-go mailing list >> Computer-go@dvandva.org >> http://dvandva.org/cgi-bin/mailman/listinfo/computer-go > > > > _______________________________________________ > Computer-go mailing list > Computer-go@dvandva.org > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go -- Łukasz _______________________________________________ Computer-go mailing list Computer-go@dvandva.org http://dvandva.org/cgi-bin/mailman/listinfo/computer-go
