[Starpu-devel] GPU issue with r12137

[Xavier Lacoste <xavier.lacoste@inria.fr>]

Hello,

I noticed a regression with starpu 1.1 together with PaStiX.

When I use a GPU (plus 11 CPUs) I get numerica errors in my results.

To reproduce this you can go on mygale and copy : 

~lacoste/ricar/src

~lacoste/starpu.git/loadEnv

~lacoste/starpu.git/test.sh

You just have to source loadEnv and update test.sh to your configuration.

> bash test.sh

 should retrun 0 is the test is valid 1 either (or 125 if an other error occured).

I did a bisection this night and the result was :

8d31273ef44a90aa8f3fba282af5b17e08a6cf67 is the first bad commit

commit 8d31273ef44a90aa8f3fba282af5b17e08a6cf67

Author: thibault <thibault@176f6dd6-97d6-42f4-bd05-d3db9ad07c7a>

Date:   Thu Jan 30 12:44:00 2014 +0000

    backport r12137 from trunk: Use different streams for gpu-gpu transfers

    git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/starpu/branches/starpu-1.1@12138 176f6dd6-97d6-42f4-bd05-d3db9ad07c7a

:040000 040000 967f352b1e0c64e6aade640ce8f29aacdffebdcd 50c8525dcee5d4067b7121d5c09e82eb6c5d163c M      src

bisect run success

Regards,

XL.

----------------------------------------

Xavier Lacoste

xavier.lacoste@inria.fr

INRIA Bordeaux Sud-Ouest

200, avenue de la Vieille Tour

33405 Talence Cedex

Tél : +33 (0)5 24 57 40 69