30 November 2009

Midweek post

A mid-week posting for a change.

Its been hot most of this week so most of the computers have been off. The old work horse Maul has been running every night when things cool down along with one of the other machines.

Einstein does cuda
The guys at Einstein@home have released a hybrid app that uses both a cpu and a gpu. It seems to saved all of one hour (from the usual 5 and a 1/2). So all in all not a particularly good improvement. I have disabled the gpu from use on their project as i'd rather run work that will fully utilise the graphics cards.

I have been concentrating on Einstein and GPUgrid in the hope of getting the Einstein scores up a bit. Unfortunately it doesn't seem to have made much difference, except to my pending results.

Chekov doesn't like beta
I have installed the ATI beta OpenCL drivers v2 on Chekov. Since upgrading to Windows 7 x64 it has been crashing on the 1st boot-up. After it reboots it seems to work. I didn't have this problem with the same drivers when running 32 bit. I presume its badly written drivers. As its been hot I haven't had a chance to install the latest release drivers (instead of beta) due to Chekov being off.

I did try the Milkyway gpu app but they all failed. Unfortunately their app was written using an older SDK and the CAL/Brook+ DLL supplied is rather old.

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