all_reduce_test stop.

[ClaireYang]

I used CentOS 7.0 and CUDA 7.5 on the server with 6pcs Tesla cards, it stop and has no response when running ./all_reduce_test 10000000 under single folder.

My GPU topo is as below

CPU 0 -- GPU0
-- GPU1
-- GPU2
CPU 1 -- GPU3
-- GPU4
-- GPU5
Even I ran with ./all_reduce_test 2 0 1, it still didn't run.
Do I need to install MPI even if I use tests in single folder? Is single test valid for multi-CPU as the topo above?
I checked ACSCtl, all are negative. I don't know what I can do.

[sjeaugey]

Could this be the same problem as in #19, i.e. you need to turn off ACS ?

[ClaireYang]

I used Lspci –vvv | grep ACSCtl to check, and all have disabled ACSCtl. So I don't know what I can do.

[ClaireYang]

An new driver can be fixed this issue, which has been posted on nvidia website.