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Up Topic Rybka Support & Discussion / Rybka Discussion / Only 1 of 4 cores uses correct hash size. BUG?
- - By yorkman (**) Date 2011-08-31 20:17 Edited 2011-08-31 20:22
I've set Rybka 4.1 to start with 2048 hash size (or any other size) and I can see in Task Manager, under the column Peek Working Set Memory (you have to enable it under View -> Select Columns) I see only one Deep Rybka 4.1 x64.exe showing 256 MB while the other 3 are only 9 MB.  I have seen (rarely) where it shows all 4 cores at 2048 MB each which I think is what I should see.

Can anyone confirm this?

I have 8 GB of ram....and 12GB set in W7 x64.

Also, when I load a saved hash file, often I see only one rybka process with CPU at 25...the other 3 are 0.  If I stop Rybka and run it again all 4 show 25 each.  Still bugs in Rybka 4.1 x64 it seems! This never ends does it?!
Parent - - By Fulcrum2000 (****) Date 2011-08-31 20:26

> I've set Rybka 4.1 to start with 2048 hash size (or any other size) and I can see in Task Manager, under the column Peek Working Set Memory (you have to enable it under View -> Select Columns) I see only one Deep Rybka 4.1 x64.exe showing 256 MB while the other 3 are only 9 MB.  I have seen (rarely) where it shows all 4 cores at 2048 MB each which I think is what I should see.


It's a 'bug' in the Task Manager, it doesn't show the correct memory used when using large pages.

> Also, when I load a saved hash file, often I see only one rybka process with CPU at 25...the other 3 are 0.  If I stop Rybka and run it again all 4 show 25 each.  Still bugs in Rybka 4.1 x64 it seems! This never ends does it?!


When saving the hash file it stops calculating because it can not access the hash file at that time. For saving only one core is needed -> normal behavior.
Parent - - By yorkman (**) Date 2011-09-01 02:43
When saving the hash file it stops calculating because it can not access the hash file at that time. For saving only one core is needed -> normal behavior.

- No, that's not what I mean.  I didn't say when saving...pls read again.  I said when "loading" a saved (game) file (.rsh).  And I don't mean just during the load...it's forever unless I stop and start the engine.  This was always a problem...even in previous versions of Rybka/Aquarium.

- As for a bug in the Task Manager...are you trying to say it's Microsoft's bug? I doubted...never had this problem with any other application.  I suppose I could try downloading some other Task Manager (3rd party) and see if you're right....
Parent - By Ray (****) Date 2011-09-01 04:59

> As for a bug in the Task Manager...are you trying to say it's Microsoft's bug?


Yes, it is. Why do you think that is an impossibility ?
Parent - By Fulcrum2000 (****) Date 2011-09-01 10:18

> - No, that's not what I mean.  I didn't say when saving...pls read again.  I said when "loading" a saved (game) file (.rsh).


It's the same loading/saving, the hash file is simply locked then. After that engine should start calculating normally, at least it does here. Sometimes (Fritz GUI) I have to go 1 move back and forth again to let the engine start. Seems like a GUI issue, not a Rybka one.

> - As for a bug in the Task Manager...are you trying to say it's Microsoft's bug? I doubted...never had this problem with any other application.
> I suppose I could try downloading some other Task Manager (3rd party) and see if you're right....


A bug is a big word, but the default memory column you see shows this 'reduced' memory use. You have to select a different column to show the exact one, maybe someone can help here. It's posted before on the forum.
Up Topic Rybka Support & Discussion / Rybka Discussion / Only 1 of 4 cores uses correct hash size. BUG?

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