Re: Thinker 5.4 2CPU <-> Thinker 5.4 4CPU
Posted: Wed Feb 04, 2009 9:41 pm
>The "threads" option in Thinker is the number of search threads. However, Thinker has a master thread for monitoring the search. This means that when you specify 4 threads, there are actually 5 active threads. If your machine only has 4 CPUs, this would be really bad.
I suggest that you try "threads=3" if your machine only has 4 CPUs.
Also, the parallel search code is currently being overhauled by Kerwin. We should see better scaling in the next release.
Cheers<
Hi Lance,
what U say is not what I get on my screen. Watching the CPU-Meter in Vista’s Sidebar, even the Taskmanager, you can see how many processors are working. In my current tournament all 7 engines are configured with two threads and exactly so it is shown on the display”: 50% of the CPU, no more and no less. With an additional master thread there must be shown 75%, isn't it !?
The tournament goes on Arena 2.0, five programs are running as UCIs and your Thinkers as native Winboards. The parameters in the commando line are: threads=2 hashsize=9 (256 MB)
Nice, when the programmers themselves show up here sometimes
regards Rainer
I suggest that you try "threads=3" if your machine only has 4 CPUs.
Also, the parallel search code is currently being overhauled by Kerwin. We should see better scaling in the next release.
Cheers<
Hi Lance,
what U say is not what I get on my screen. Watching the CPU-Meter in Vista’s Sidebar, even the Taskmanager, you can see how many processors are working. In my current tournament all 7 engines are configured with two threads and exactly so it is shown on the display”: 50% of the CPU, no more and no less. With an additional master thread there must be shown 75%, isn't it !?
The tournament goes on Arena 2.0, five programs are running as UCIs and your Thinkers as native Winboards. The parameters in the commando line are: threads=2 hashsize=9 (256 MB)
Nice, when the programmers themselves show up here sometimes
regards Rainer