cancel
Showing results for 
Search instead for 
Did you mean: 

Archives Discussions

kanikani
Journeyman III

GPU detection bug?

Good day,

i have two HD 7970 card to perform some science calculation on it using BOINC platform.

but i have i problem with detection of second GPU.

BOINC logs next:

Thu 15 Nov 2012 02:46:00 PM  | | OpenCL: ATI GPU 0: Tahiti (driver version 1084.2 (VM), device version OpenCL 1.2 AMD-APP (1084.2), 3072MB, 2730MB available)

Thu 15 Nov 2012 02:46:00 PM  | | OpenCL: ATI GPU 1 (not used): Tahiti (driver version 1084.2 (VM), device version OpenCL 1.2 AMD-APP (1084.2), 2048MB, 0MB available)

is it driver bug, sdk bug, boinc bug or something else?

ubuntu 12.10 64bit, catalyst 12.11beta, app sdk 2.7

on ubuntu 12.04 and catalyst 12.10 boinc can't detect second GPU at all:

Fri 16 Nov 2012 03:04:36 AM  | | ATI GPU 0: AMD Radeon HD 7900 series (Tahiti) (CAL version 1.4.1741, 3072MB, 2711MB available, 11264 GFLOPS peak)
Fri 16 Nov 2012 03:04:36 AM  | | OpenCL: ATI GPU 0: AMD Radeon HD 7900 series (Tahiti) (driver version CAL 1.4.1741 (VM), device version OpenCL 1.2 AMD-APP (923.1), 3072MB, 2711MB available)

0 Likes
5 Replies
binying
Challenger

There are helpful discussions on this forum about this problem on linux.

For example, http://devgurus.amd.com/message/1161943#1161943

"...

I setup xorg conf using:

aticonfig --adapter=all  --initial -f

CLInfo reports only one GPU (first core of first 5970)

if I setup xorg using:

aticonfig --adapter=0  --initial -f

CLInfo repots two GPUs (first and second core of first 5970)

..."

Have u activated both GPUs?

0 Likes

clinfo reports 3 app devices:

first two is 7970 gpu, third is CPU.

0 Likes

"is it driver bug, sdk bug, boinc bug or something else?"

If that's case, run the multi-GPU sample in the SDK. If it passes, chances are it's not a driver bug or sdk bug.

0 Likes

i''l try. where is it located and how it is named?

0 Likes
kanikani
Journeyman III

solved. it is BOINC detection problem.

0 Likes