On 02/12/11 11:19, Joost 't Hart wrote: Hi!
>> On Sat, Feb 12, 2011 at 1:45 AM, lo sus<los...@hotmail.com> wrote: >>> Thank you both for the information and advice. >>> Which engines would you advise me to add to SCID? >> In Linux Mint I'm using Stockfish 1.8, because 1.91 makes my (not very >> powerful) system unusable, eating all the resources. I haven't tried >> the more recent versions. > > I noticed the same thing over time/version. Hence, do not blame your > machine :-) > > As stated, I will look into this. Suspicion is partly that SF is not > very strict in following > UCI specificiations, as I had to implement a few nasty workarounds in Scid's > analysis module. There is actually one issue I noticed in recent stockfish versions, but this depends a bit on how you compile it, so I'm not sure if it really relates to a specific version or if it is a bug at all. (Do you use the supplied binaries or do you build yourself? Probably they have changed the way how they build them.) However, unless you nice the engine it will surely use 100% of your CPU to do calculations. This is normal for a chess engine (actually for any program that does calculations; I always used my fortran codes instead of a CPU burner if we thought a CPU had an issue and wanted to test this). So nothing wrong here and if you use your CPU it gets hot and your fans start up. Works as designed. However, if I compile Stockfish using make ARCH=x86-64-modern (the issue is the -modern) I tell stockfish that it may use all available CPUs in the system. In the case of my notebook this will result in 2 real and 2 virtual cores to go up to maximum speed and 100% usage. Of course this invokes the cooling system. If I leave out the -modern stockfish will use only one core at 100%. Surely, you'll notice less fan activity in this case as the CPU stays relatively cool here. BTW: you could of course limit the CPU frequency allowed. Don't know how to do this on the Mac but on Linux you could use another power management govenor (e.g. powersave instead of ondemand) or limit the maximum frequency. This will limit the abilities of your chess engine as well, of course. But it also avoids the heat issue. cu Alexander ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Scid-users mailing list Scid-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scid-users
