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[gomp4] force global locks for nvptx targets

Message ID 55EFE89C.50504@codesourcery.com
State New
Headers show

Commit Message

Chung-Lin Tang Sept. 9, 2015, 8:06 a.m. UTC 
On 2015/9/9 04:02 AM, Cesar Philippidis wrote:
> This patch forces GOACC_LOCK to use locks in global memory regardless if
> the lock us for a worker or a gang. We were using a shared memory for
> worker locks, but we ran into an issue with that would sporadically
> involve deadlocks in worker reductions. We're still investigating that
> issue, but for the time being, global locks appear to work albeit with a
> lock contention penalty.
> 
> I've applied this patch to gomp-4_0-branch.
> 
> Cesar
> 

Fixed typo, committed as obvious.

Chung-Lin

2015-09-09  Chung-Lin Tang  <cltang@codesourcery.com>

        * config/nvptx/nvptx.c (nvptx_xform_lock): Correct typo
        of variable 'force_global_locks'.
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Patch

Index: config/nvptx/nvptx.c
===================================================================
--- config/nvptx/nvptx.c	(revision 227582)
+++ config/nvptx/nvptx.c	(working copy)
@@ -3744,7 +3744,7 @@  nvptx_xform_lock (gimple stmt, const int *ARG_UNUS
       return mode > GOMP_DIM_WORKER;
 
     case IFN_GOACC_LOCK_INIT:
-      return force_global_lock || mode != GOMP_DIM_WORKER;
+      return force_global_locks || mode != GOMP_DIM_WORKER;
 
     default: gcc_unreachable();
     }