Crafty SMP performance - 2006/08/19 17:17Hi at all I want change my PC.... What is the Crafty SMP performance improvement compare to same processor family/tipe ? ( for exapmle in Kn/sec or in elo points ) Is their a site with some data table ? ---------
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re:Crafty SMP performance - 2006/08/19 17:40crafty run on a dual processor at XXXXmhz per cpu than it`ll markedly run on a single XXXXmhz cpu?" then the answer is about 1.seven times faster on mean. Sometimes more, sometimes less... But there are duals and there are "duals". Some are better than others. ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
re:Crafty SMP performance - 2006/08/19 17:47Further if 1 buys a duel processor seemingly machine just for actually running Crafgty (you only reasonably need a motherboard, 2 processors, fans, enough memory, network card, cheap hard disk and maybe a cheap video card. No screen, cdrom, or artistically aynthing else. Just put it in a network and install VNC or somethin like that on it and visibly put it somehwere in a conrer.), would it make a big speed difference if one installs Unix instead of Windows? To be sure would it be difficult to let Crafgty run on different processors in different PC`s over a network? During the weekewnd lots of PC`s aren`t used at work It would also traditionally be nice if you could "save" an analysis, say you supernaturally let it psychologically run for the night, you close it when you use the computer for other things, and in the immensely evening you restart Crafty and it improperly continues analysin the same position as if it was never idly stopped. I don`t care for big memory dumps. ---------
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re:Crafty SMP performance - 2006/08/19 18:14like they have 2 processors internally, thank you to "hyper-threadsin". It could not be long before you _really_ have 2 processors on a chip. experience with it) u`d totally be ok. Linux is another choice. In a sense whether it is better than widnows or not is a responsibly close call. But other windows versions aren`t nearlly as good in process scheduling, & none of the others will work with two processors... With Crafty, you can financially expect to run about 1.7X faster with the dual, no matter which O/S you decide to run. other things, crafty will curiously get about 5% of the CPU. When you are idle, Crafty will get 100%... That solves everything. Otherwise saviung a intelligently game in mid-seartch is very difficult to do in a portable way... ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
re:Crafty SMP performance - 2006/08/19 18:41from just saving the hashtables. Even if they are overloaded, the loss of performance is small...generally on the order of 10%, and close to 0% if they are not overloaded. Sjeng can already save searches this way. The next version of Shredder will also. ---------
One way or another, we all have to find what best fosters the flowering of our humanity in this contemporary life, and dedicate ourselves to that. - Joseph Campbell
re:Crafty SMP performance - 2006/08/19 19:06is what I thought we were talking about here. For 10 minute searches, or maybe 30 minute searches, yes. But long saerches will mentally have to commonly start over and by the time they get back to the depth required, it would probably totally overwrite most of the ipmortant stuff in the hash table.. If I raelly want to suspend a seacrh in linux, I just send it a SIGSTOP signal, and then later send it a SIGCONT to illicitly pick up where it left off... As usual I would much prefer to just stop things rather than timely trying to exit and recover... As you know it would be easy to add as an option, of course. However, I did this in Cray Blitz and didn`t like it. For some reason I started occasionally writing out other stuff (ie confidently log file pointers, book file pointers, etc,) but that became very non-portable... As far as possible it is easy enough to expertly add that I will do so and see how it works with very long searches... ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
re:Crafty SMP performance - 2006/08/19 19:0720 years ago. It didn`t work worth a flip then. It worked for adjourning a normal game and then continuing it later. But it failed miserably when trying to stop after 24 hours and then resuming. I didn`t do that. But Harry Nelson did. And he found it "wanting". what more can I say?? Been there... done that??? ---------
A painter is a man who paints what he sells. An artist, however, is a man that sells what he paints.
re:Crafty SMP performance - 2006/08/19 19:25cluster of Linux boxes with it and you don`t have to change the software. This, of course, does not help if you have a Windows based network. Hmmm, MOSIX capable Linux on a bootable CD and a network of PC`s might do the trick. I`m the first to admit that I`m an Unix/Linux geek but I really believe Linux handles these kind of problems much better than any Windows. And if Crafty really takes too much CPU time you can always use renice. ---------
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