Rybka 4, large pages?

[zappa79]

I have set up my computer so it can use large pages, but how do I enable it in polygot?

Thanks in advance!

[Waldemar]

Add this line in polyglot.ini under [Engine]:

UseLargePages=true

[zappa79]

Thanks that worked!

Do you know what the Ultraoptimistic playing stile is?
I have the following line in my polygot.ini:

Playing Style = ultraoptimistic

And I dont know what it means!

Thanks!

[Waldemar]

This line doesnt belong to Rybka 4, must be a line to an old rybka version.

More info about Rybka 4 and its parameters here:

http://rybkaforum.net/cgi-bin/rybkaforu ... 16985;pg=2

[zappa79]

How do I know that the "large pages" are really active and working?
I cant find anything that indicates it!

Thanks!

[matematiko]

Read this pdf file:
http://rybkaforum.net/mwf/rybkaattach/2 ... aftFAQ.pdf

At the end says:

How do I know if my Rybka is using the Large pages?
The way I do this is to enable the Rybka log (not the xlog), load the Rybka engine and
look in the log. The log is in the same directory as the Rybka executable and has the
name uci.<data>.<number>.txt.
A successful allocation of a hash table of 2GB with large pages looks like this in the
log:
-->> setoption name Use Large Pages value true
Use large pages enabled.
-- shared synchronization file: RybkaSync13744
-- shared exchange file: RybkaEx23744
Using large pages, size = 2147483648
Using large pages, size = 2147483648
A failure when trying to obtain large pages looks something like this in the log:
-->> setoption name Hash value 256
-- shared synchronization file: RybkaSync14432
-- shared exchange file: RybkaEx24432
<<-- ERROR: API = CreateFileMapping
<<-- error code = 1450
<<-- message = Insufficient system resources exist to
complete the requested service.
Large pages not used - CreateFileMapping () returned invalid handle.
Please check memory fragmentation, privileges and UAC (and reboot if
necessary)

Cheers,