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Re: GNU chess seems to always run at 100% CPU

From: Antonio Ceballos
Subject: Re: GNU chess seems to always run at 100% CPU
Date: Sat, 6 Oct 2012 20:25:32 +0200

Hi Alexander,

Sorry for my mistake with the name.

I will have a look into it as soon as I can. I will let you know of any news. Meanwhile, any help is much appreciated.


On Sat, Oct 6, 2012 at 7:31 PM, Alexander Maryanovsky <address@hidden> wrote:

Not sure who Matt is, but I would be really glad if this could be looked into. My use case involves the engine waiting for an opponent most of the time, and then waiting for him to move most of the time during a match (ponder=off). The priority is using as little resources as possible, rather than having the strongest engine possible.

Alexander (aka Sasha) Maryanovsky.

On Sat, Oct 6, 2012 at 8:49 PM, Antonio Ceballos <address@hidden> wrote:
Hi Matt,

GNU Chess 6 uses 100% CPU, it is normal behaviour. Since it is expected to be playing most of the time, this should not be a big issue. Anyway, decreasing the CPU usage when the program is in "standby" is certainly an improvement we should address.

Thanks for your interest.
Antonio Ceballos

On Thu, Oct 4, 2012 at 3:00 AM, Alexander Maryanovsky <address@hidden> wrote:
Hello all,

It seems that regardless of the way I run GNU chess, it consumes 100% CPU time, even before any commands are issued.
Examples I've tried that all cause this behaviour:
./gnuchess --easy
./gnuchess --uci

After any of the above, "top" shows gnuchess running at 100% CPU right away (without entering any commands).

[~/gnuchess/bin] ./gnuchess --version
GNU Chess 6.0.2
[~/gnuchess/bin] uname -a
Darwin Alexanders-MacBook-Air.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

Please let me know if you need more information.

Alexander (aka Sasha) Maryanovsky.

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