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Up Topic The Rybka Lounge / Computer Chess / Cpu Usage
- - By siah (***) Date 2012-04-14 13:49
I loaded tree engine at infinite analyse as kibitzer and at 2 line, deep fritz 12, deep rybka 4.1 and houdini 2c.
I opened the task manager, I saw houdini was using 60-70% of cpu, fritz 20-30% and rybka less than 10%.
Why is that?
Parent - - By Vempele (Silver) [fi] Date 2012-04-14 13:59
What, at the same time? They all try to grab all the CPU time they can, it's all about how rude they're willing to be with other CPU-intensive programs around.
Parent - - By siah (***) Date 2012-04-14 14:51
You mean they can affect other programs? :yell:
Any way your answer was not convincer.
Parent - - By Vempele (Silver) [fi] Date 2012-04-14 15:27

> You mean they can affect other programs? :yell:


Houdini uses one process (with as many threads as necessary) with Normal priority. Rybka uses multiple single-thread processes, one at Normal priority, the rest at Below Normal (by default). If you run both at the same time without limiting the number of cores they're allowed to use, Houdini's Normal will dominate Rybka's Below Normal processes, leaving Rybka with 1 core plus scraps, and she has to fight for that one core as well.

I don't have Fritz so I don't know why it gets 20-30% instead of much less or much more.
Parent - By siah (***) Date 2012-04-15 06:24

>Houdini's Normal will dominate Rybka's Below Normal processes.


My question is why houdini can dominate rybka. (and rybka is normal priority)
Parent - By Uly (Gold) [mx] Date 2012-04-14 15:42
Try using Zappa Mexico II instead of Rybka, it'll probably use 1% of the CPU or less so it lets more resources to Fritz and Houdini. Then you can switch Houdini to Low Priority so Houdini is allowed to reign.
- - By Pia (***) [ru] Date 2012-04-15 02:01
Houdini 1.5a and even Fritz 10 heats up my Q6600 @ 32 bit more intense than Rybka.
I think it depends on programming code, not just priority. Houdini's so intense, that even freezes the screen as if it was using GPU CUDA.
Parent - - By siah (***) Date 2012-04-15 06:28
Disable overclocking to have a cool cpu.
Parent - - By Pia (***) [ru] Date 2012-04-15 07:41
It didn't OCed. Even 2 MHz slower than stock (MB settings vary from one manyfacturer to another).
But when do, Houdini may crach my system in a matter in minutes even if CPU's cool.
Parent - - By siah (***) Date 2012-04-16 06:53
Do you have blue screen and it only happen by houdini?
Parent - - By Pia (***) [ru] Date 2012-04-16 07:55
No, it's like hardware failure, cold hang up. And yes, basically, with other engines I can expect at least week of play when OCed.
Parent - By siah (***) Date 2012-04-18 08:41
Stockfish is like houdini, uses full cpu. Is the the same with stockfish?
And do the below:
Test it with restoring cpu settings to default, and another time change your OS with formatting the drive, and tell me the result.
Up Topic The Rybka Lounge / Computer Chess / Cpu Usage

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