Re: [computer-go] Strong programs on cgos 19x19?
The strong pachi is really strong! What hardware is it running on? Can you say how it differs from the vanilla pachi? It's exactly the same software. The only difference is that is running on 23 cores. I am amazed at how well MCTS scales on 19x19. Looking forward to desktop machines with thousands of cores in a few years... Jean-loup ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
Jean-loup Gailly wrote: The strong pachi is really strong! What hardware is it running on? Can you say how it differs from the vanilla pachi? It's exactly the same software. The only difference is that is running on 23 cores. I am amazed at how well MCTS scales on 19x19. Looking forward to desktop machines with thousands of cores in a few years... What is your 23 core hardware? How much is it? -- Yamato ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
On Thu, Feb 18, 2010 at 10:30:56AM +0100, Jean-loup Gailly wrote: It's exactly the same software. The only difference is that is running on 23 cores. I am amazed at how well MCTS scales on 19x19. It would be interesting to know how well Pachi scales on KGS against ranked humans vs a single core version. It's well established that monte carlo scales well against itself, but there's very little data against humans, especially in the near dan range. -Jeff ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
What is your 23 core hardware? It's actually 24 cores but I'm leaving 1 core free for the OS and other background tasks. The chips are commercially available, search for 6 cores or 24 cores on your favorite search engine. Jean-loup ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
It would be interesting to know how well Pachi scales on KGS against ranked humans vs a single core version. Yes it would be interesting but it's a bit difficult to run this experiment. The software and its parameters is constantly changing. We can't create a new kgs bot for every new version or parameter change, it wouldn't have enough time to get a rating. Also people escape more often against bots, it takes time to get these escaped games counted in favor of the bot. Here is one comparison, but it's far from a good scientific experiment. pachiIV and pachi2 on kgs are running exactly the same software or may be differ by a few days. pachiV runs on 4 cores and is 3k. pachi2 runs on different machines, from 15 to 23 cores, and is 2k. This would indicate that scalability against humans is not as good as against bots. But again this is not a scientific experiment. Jean-loup ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
On Thu, Feb 18, 2010 at 02:57:32PM +0100, Jean-loup Gailly wrote: Yes it would be interesting but it's a bit difficult to run this experiment. The software and its parameters is constantly changing. We can't create a new kgs bot for every new version or parameter change, it wouldn't have enough time to get a rating. Also people escape more often against bots, it takes time to get these escaped games counted in favor of the bot. I'd argue that measuring performance against humans is the main challenge now. Beating up other monte carlo bots with bigger hardware isn't very interesting. The way to get good measurements is to put a stake in the sand and let it run, preferably with somewhere between 15 and 30 seconds byo-yomi. However, I don't really have the hardware or inclination to run the test myself, so I won't harp on the issue. -Jeff ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
RE: [computer-go] Strong programs on cgos 19x19?
Is this 23 cores SMP working on the same tree, or four by 6-cores? I'm running a cluster of four 4-core 2.3 GHz machines, using MPI to share the core of the trees a few times a second. The results between zen-1c, mfgo-16c and pachi-23c are interesting. Zen wins about 60% against many faces and pachi, but pachi wins 70% against many faces. There aren't very many games so this could be just a statistical anomaly. david From: computer-go-boun...@computer-go.org [mailto:computer-go-boun...@computer-go.org] On Behalf Of Jean-loup Gailly Sent: Thursday, February 18, 2010 1:31 AM To: computer-go Subject: Re: [computer-go] Strong programs on cgos 19x19? The strong pachi is really strong! What hardware is it running on? Can you say how it differs from the vanilla pachi? It's exactly the same software. The only difference is that is running on 23 cores. I am amazed at how well MCTS scales on 19x19. Looking forward to desktop machines with thousands of cores in a few years... Jean-loup ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
Re: [computer-go] Strong programs on cgos 19x19?
or the strong version of pachi. Done. Jean-loup 2010/2/16 David Fotland fotl...@smart-games.com My old MPI code had a scaling bug. Performance scaling (playouts per second) was linear, but the strength did not scale well, and 64 cores was weaker than 32 cores. I have a 16 core cluster of my own now (four 2.3 GHz Q8200 quad core), and I discovered that the MPI code hangs when using MPICH2 rather than the Microsoft MPI library. So last week I rewrote it with a different algorithm, and it seems to scale much better. It's on CGOS now, for at least a few days. It would be great if some other strong programs could join, zen, or fuego-8c, or aya-4c, or the strong version or pachi. Thanks, David ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/ ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
RE: [computer-go] Strong programs on cgos 19x19?
The strong pachi is really strong! What hardware is it running on? Can you say how it differs from the vanilla pachi? David From: computer-go-boun...@computer-go.org [mailto:computer-go-boun...@computer-go.org] On Behalf Of Jean-loup Gailly Sent: Wednesday, February 17, 2010 9:50 AM To: computer-go Subject: Re: [computer-go] Strong programs on cgos 19x19? or the strong version of pachi. Done. Jean-loup 2010/2/16 David Fotland fotl...@smart-games.com My old MPI code had a scaling bug. Performance scaling (playouts per second) was linear, but the strength did not scale well, and 64 cores was weaker than 32 cores. I have a 16 core cluster of my own now (four 2.3 GHz Q8200 quad core), and I discovered that the MPI code hangs when using MPICH2 rather than the Microsoft MPI library. So last week I rewrote it with a different algorithm, and it seems to scale much better. It's on CGOS now, for at least a few days. It would be great if some other strong programs could join, zen, or fuego-8c, or aya-4c, or the strong version or pachi. Thanks, David ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/ ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
