Re: [Starpu-devel] GPU issue with r12137

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

Xavier Lacoste, le Thu 03 Apr 2014 14:42:16 +0200, a écrit :
> Yes I have only one GPU with 11 cores.

Could you apply the attached patch and send the resulting backtrace?
That will tell us when it tries to do a CUDA-CUDA transfer.

(I don't have the permissions on starpu.git/loadEnv and test.sh)

Samuel
Index: src/datawizard/coherency.c
===================================================================
--- src/datawizard/coherency.c  (révision 12540)
+++ src/datawizard/coherency.c  (copie de travail)
@@ -172,6 +172,7 @@
                        enum starpu_node_kind kind = 
starpu_node_get_kind(handling_node);
                        /* GPUs not always allow direct remote access: if 
CUDA4
                         * is enabled, we allow two CUDA devices to 
communicate. */
+                       STARPU_ASSERT(kind != STARPU_CUDA_RAM);
                        return
 #if 0
                                /* CUDA does not seem very safe with 
concurrent