scksz

Using ACML-GPU1.1.1 and HD4870x2 run HPL, Q only can be equal to 2!

Discussion created by scksz on Aug 20, 2010
when using many graphical card in HPL test, Q only can be equal to 2, P is too bigger than Q!

Hi, all!

I want to us 16 nodes, which has one HD4870x2 card, with 32 GPUs to run HPL, I find Q only can be equal to 2! P is bigger than Q, so the benchmark is very lower than Rpeak. How can I solve this problem?

when Q is greater than 2, like P*Q = 8*4, will display error output like below:

gpu1           Total   Available   Last Request
Local:       1024 MB     1003 MB     16777216 (  16 MB) FAILED
Remote (NC): 1788 MB     1770 MB            0 (   0 MB) FAILED
Remote (C):   508 MB      507 MB            0 (   0 MB) FAILED

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