Author: Frank Phillips
Date: 07:44:46 05/12/01
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On May 12, 2001 at 09:42:15, Robert Hyatt wrote: >On May 12, 2001 at 03:22:30, Frank Phillips wrote: > >>When my program is running on FICS under Linux and accessing the EGTBs >>(performing a lot of disk activity), it seems to forget to look at the input >>from the server for long periods of time, so that the opponent's clock goes >>negative. When not accessing the EGTBs (or running under Windows) everything is >>fine. >> >>(Frustrating, since I may have to move to Linux if MS decide next that your >>first born is part of the licence fee for using their sotware, in interests of >>the consumer and to protect freedom and democracy against the evil threat of >>open source software of course.). >> >>Any help appreciated. >> >>Frank > >There must be something else wrong. I run linux exclusively and have _never_ >seen anything like this, period. I find linux scheduling and interrupt handling >to be as good as anything around. You are not useing a node counter to trigger >your input check I hope? IE if you decide to check every 500K nodes, and you >reach an ending where you only search 50K nodes per second, you might not be >checking for input often enough... I am using a node counter to trigger input check and I do see the dramatic drops in nps you indicate, but set the trigger value according to previous nodes per second (unless there is little time left), so should only see the described behaviour once. /* Calculate number of nodes before a test is done for user input on | | next itereation. SetTargetTime() sets time_check_nodes to | | last_time_check_nodes or shorter depending on time remaining. | | | ----------------------------------------------------------------------- */ int time=(root.stop-root.start); if (time > 100) last_time_check_nodes=stat.nodes/time*100/4; //4 times per second. else last_time_check_nodes=TIMECHECK; When I understand threads better I will try that approach....... I thought Crafty used a node counter in Search(). Better take another look. Frank
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