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Subject: Re: BUG in Fritz under Win2000, Hash Tables cleared when minimizes

Author: John Merlino

Date: 14:15:39 03/24/03

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On March 24, 2003 at 06:56:21, Javier Ros Padilla wrote:

>BUG in Fritz under Win2000
>
>in WIN2000 you can key Control-Alt-Del and run Task Manager
>in engine-engine matches you can see, processes, CPU, time and memory employed
>
>for example Fritz 8-CM9000SKR (TheKing323) Hash tables 64 Mb for each
>
>Program           CPU    Time    Memory
>Chessprogram7.e    99    18:06  70.348 Kb
>TheKing.exe        00    10:44  63.216 Kb (these values may depend on machine)
>
>if you minimizes Fritz program when TheKing is thinking, for example for read
>mail, the amount of memory employed by Chessprogram7.e fall to aprox 2004 Kb
>
>SO HASH TABLES ARE CLEARED!!!
>
>if the game continues, when Fritz starts to think the memory raises to 70.348 Kb
>and this value remains high for the rest of the game
>so the problem is not very serious
>
>I have observed this bug in Fritz 7 and Fritz 8 GUI
>
>               Javier Ros

I wouldn't exactly call this a bug, but rather an annoying but not surprising
necessity of multitasking.

The Chessmaster GUI does, in effect, the same thing only more so. The
requirement of a "minimized" program is that the program should take up as few
resources as possible. The CM GUI actually shuts down any game in progress,
shutting down both engines as well, if the application is minimized. When the
app is reactivated, the engines are re-launched and told where in the game to
start thinking from.

The problem is that there is no "pause" command in the Winboard protocol (or, at
least not in v1), so there was no other solution available.

jm



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