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Previous Next Up Topic Rybka Support & Discussion / Rybka Support / Rybka 4 FAQ (18771 hits)
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Parent - By Vasik Rajlich (Silver) [pl] Date 2010-05-27 02:58
I don't tknow - you'll need to check with Convekta.

Vas
Parent - - By Arifur (**) [gb] Date 2010-05-27 12:51
Does the Large Page settings effect any other applications in a bad way?

Once I have done the OS changes required for Large Pages, can I undo the settings if I want to?
Parent - - By Lukas Cimiotti (*****) [de] Date 2010-05-27 12:54

>Does the Large Page settings effect any other applications in a bad way?


Usually not

>Once I have done the OS changes required for Large Pages, can I undo the settings if I want to?


Yes, it's simple
Parent - - By Arifur (**) [gb] Date 2010-05-27 13:16
Thanks.

> Usually not


What do you mean? Do you have experiences of when this is not good?
Parent - - By Lukas Cimiotti (*****) [de] Date 2010-05-27 13:39
Windows can't put large pages into the swap file. So if you are running too many applications at a time and memory gets low, the performance of other applications will go down.
Parent - - By SpuddyBuddy (*) [ae] Date 2010-05-27 13:56

> memory gets low


96 gb should be enough, lol
Parent - By Akbarfan (***) [de] Date 2010-05-27 17:02
not everybody has a gusher behind his house :-) :-) :-)
Parent - By Akbarfan (***) [de] Date 2010-05-27 20:07
oil well  :-)
Parent - By Felix Kling (Gold) [de] Date 2010-05-27 16:33 Edited 2010-05-28 13:53
Don't make the FAQ too long this time. It should only contain the most important basic questions. Add a LessFAQ maybe :)
Parent - - By Uly (Gold) [mx] Date 2010-05-31 09:15
Did you expect a +35 elo difference on the rating lists?
Parent - By Vasik Rajlich (Silver) [pl] Date 2010-06-04 13:25
It depends on who the opponents are (since contempt is now off by default).

Vas
Parent - - By oudheusa (****) [nl] Date 2010-06-06 09:34
Vas can you plse provide a sticky thread in the FAQ section on Rybka parameter settings, briefly explaining about TC and piece values settings. defaults, ranges and tips?

thnx.
Parent - - By Vasik Rajlich (Silver) [pl] Date 2010-06-06 12:06
Ok. I'll try to finally hit that next week. Sunday is a day of rest. :)

Vas
Parent - - By Huitzilopochtli (****) Date 2010-06-06 12:26
sabbath! Its my day off too Vas!
Parent - By Vasik Rajlich (Silver) [pl] Date 2010-06-06 12:36
For me it's more like one of my days off. :)

Vas
Parent - By irulats (***) [ie] Date 2010-06-06 13:13

> Sunday is a day of rest. :-)


Amen!
Parent - - By Laszlo (***) [fr] Date 2010-06-06 09:39
Hi Vas,

I need doc for the SSE42 version. What does it mean "SSE"? How to install it? (I found nothing about it.)
Parent - - By Vempele (Silver) [fi] Date 2010-06-06 09:40
If you can run it, it'll be faster than the regular Rybka. If you can't, your processor doesn't support it.
Parent - By Laszlo (***) [fr] Date 2010-06-06 12:02
Thank you, I can't. :)
- - By Fulcrum2000 (****) [nl] Date 2010-05-26 10:52
Please a description on all the new TC settings (and maybe some recommended defaults for certain timecontrols).
Parent - - By Vasik Rajlich (Silver) [pl] Date 2010-05-27 02:59
More info this weekend.

The normal move time controls how long Rybka thinks in the average position. Lower values mean faster play. The exact mechanism is very specific to the type of time control.

The max move time controls how long Rybka thinks in critical positions.

Vas
Parent - - By SpuddyBuddy (*) [ae] Date 2010-05-27 13:59
MultiPV_cp default 20000?
If I remember in R3 recommended setting 50, how about in R4
Parent - By Uly (Gold) [mx] Date 2010-05-27 18:02

> MultiPV_cp default 20000?


Avoids overflow on some GUI's, and 20000 is just about enough.

> If I remember in R3 recommended setting 50


It should be about the same for R4, but the 20000 setting is good enough.
Parent - - By Lukas Cimiotti (*****) [de] Date 2010-05-27 08:31
And the buffer determines when Rybka begins to play much faster when only [number of buffer] seconds are left.
Parent - - By GCP (***) [be] Date 2010-05-27 20:04
Does this also take effect in in very short timecontrols?
Parent - By Lukas Cimiotti (*****) [de] Date 2010-05-27 21:34
Yes, it is in seconds
- - By Uly (Gold) [mx] Date 2010-05-26 19:06
Do you have any plans on making Rybka 2.3.2a MP freeware? (as the demo version)
Parent - By Vasik Rajlich (Silver) [pl] Date 2010-05-27 03:00
That's not a bad idea. I'll probably do it this weekned.

Vas
- By Uly (Gold) [mx] Date 2010-05-26 19:07
(Offtopic, but for comparison)

Rybka 3 FAQ thread

(and reference)

mp tablebases bug workaround updated thread
- - By Jitugo (**) [de] Date 2010-05-27 14:52 Edited 2010-05-27 15:05
About Hyperthreading:

1) Does Rybka use the usual "Affinity Mask" trick of allocating every other processor (assuming that one only specifies half the cpus to use) or
2) Does Rybka even use HT to its advantage and intelligently distributes smaller loads to HT cores
3) Or is everything as with Rybka 3 - e.g. its best to turn off HT in Bios or set the Affinity Mask every time by hand....

About Large Pages:
How much memory does one need to consistently and safely allocate 2 GB for Hash? Is it 6GB or better 12GB?
Parent - By Vempele (Silver) [fi] Date 2010-05-27 14:55
3).
Parent - - By Lukas Cimiotti (*****) [de] Date 2010-05-27 15:19

>How much memory does one need to consistently and safely allocate 2 GB for Hash? Is it 6GB or better 12GB?


Depends on the number of cores and tablebases you've got. On my 12 GB 12 core computers (117 GB of tablebases) I only get one or two engine starts with large pages. On my 32 GB 8 cores computer I get very many - in fact it never failed so far.
Parent - - By vermillion (**) [ca] Date 2010-05-27 19:45

>I only get one or two engine starts with large pages


Do you mean two engine started at the same time?
Parent - By Lukas Cimiotti (*****) [de] Date 2010-05-27 21:37
No, restarts
- - By Cortex [ch] Date 2010-05-27 17:43
Just a n00b question :

If I purchase the multi-processor Rybka (aka Deep Rybka), does it work on a single processor computer or (shudders) must I purchase both versions ?

Thanks...
Parent - By Fulcrum2000 (****) [nl] Date 2010-05-27 17:45
Yes, works fine.
Parent - By sarciness (***) [cn] Date 2010-05-28 02:40
MP can work on 1 core.
- - By cizio2 [it] Date 2010-05-27 23:43
I use Windows 7, Fritz 12 GUI.
With Deep Rybka 3 on, nothing else running, I have 4 processes (one per core)  with a constant 100% CPU Usage.
With Deep Rybka 4 on, nothing else running, I have 4 processes (one per core) with an avarage 40% CPU Usage, and a 5% - 70% interval.
Any idea ?
Parent - - By Uly (Gold) [mx] Date 2010-05-27 23:50
Try on engine parameters:

Main Process Priority: Normal
Child Process Priority: Normal

To see if it helps.
Parent - - By cizio2 [it] Date 2010-05-28 00:08
Just tried, nothing changed.
By the way, my Rybka 3 is still 100% even with priority "low" for all processes, since there is nothing else running.
Parent - By Uly (Gold) [mx] Date 2010-05-28 02:21
Can't reproduce, this is a new reported issue.
Parent - - By Lukas Cimiotti (*****) [de] Date 2010-05-28 05:21
Priority doesn't lower CPU usage. It's just that other applications are allowed to steal time from Rybka. Did you lower CPU usage?
Parent - - By cizio2 [it] Date 2010-05-28 13:30
CPU Usage parameter is 100%.
Parent - - By cizio2 [it] Date 2010-05-29 15:48
The old main rule: closed and restarted Windows 7, and now CPU usage is 100% with Deep Rybka 4 too.
Parent - By cizio2 [it] Date 2010-05-29 23:44
It's happening again!
If I use Deep Rybka 4, then some other engine, then Rybka 4 again, it can't get to 100% CPU usage.
Probably Rybka 4 leaves some garbage around, with Windows 7, when you quit it.
Parent - By cma6 (****) Date 2010-05-29 01:31
Vytron:
  Have you seen an explanation of the various engine parameters or is that yet to come from Vas?
  For instance, why do you think your Process Priority choices might work better than the defaults?
- - By Ron Bateman (**) [us] Date 2010-05-28 11:30
Any ideas on the best parameters for analyzing a position in the Sandbox?  Thanks
Parent - By Vasik Rajlich (Silver) [pl] Date 2010-06-04 13:27
Default are best.

Vas
- - By serendipit [es] Date 2010-05-28 16:57
Is possible the upgrade from Rybka 3 to Rybka 4 now or immediate future?
Parent - By Vasik Rajlich (Silver) [pl] Date 2010-06-04 13:28
If you mean a price break for Rybka 3 users, no. (It's too complicated.)

Vas
Previous Next Up Topic Rybka Support & Discussion / Rybka Support / Rybka 4 FAQ (18771 hits)
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