MonetDB: bwd - * increased degree of paralellism on the gpu, tur...

[Holger Pirk]

Changeset: c8b821920c0a for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=c8b821920c0a
Modified Files:
        monetdb5/extras/bwd/operations.c
Branch: bwd
Log Message:

* increased degree of paralellism on the gpu, turns out nvidia GPUs like more 
parallelism


Unterschiede (23 Zeilen):

diff --git a/monetdb5/extras/bwd/operations.c b/monetdb5/extras/bwd/operations.c
--- a/monetdb5/extras/bwd/operations.c
+++ b/monetdb5/extras/bwd/operations.c
@@ -26,7 +26,9 @@ static const int eagerBufferLoading = 1;
 #ifdef __APPLE__
 static const int WORK_GROUP_SIZE=1;
 #else
-static const int WORK_GROUP_SIZE=16;
+static const int WORK_GROUP_SIZE=128;
+const int VALUES_PER_WORK_ITEM = 1;
+extern const int VALUES_PER_WORK_ITEM;
 #endif
 #define MAX_INTERMEDIATE_RESULT_SIZE 16777216
 
@@ -430,7 +432,7 @@ static inline str uselect(bat *res, bat 
                                                if((err = 
clSetKernelArg(selectKernel, bufferI+i, sizeof(int), &(parameters[i]))))  // 
type specific
                                                        printf("#%s, 
clSetKernelArg(%d): %s;\n", __func__, bufferI+i, clError(err));
 
-                                       err = 
clEnqueueNDRangeKernel(getCommandQueue(), selectKernel, 1, (const size_t[]){0}, 
(const size_t[]){ceil(dataCount/((float)WORK_GROUP_SIZE))*WORK_GROUP_SIZE}, 
(const size_t[]){WORK_GROUP_SIZE}, 0, NULL, NULL);
+                                       err = 
clEnqueueNDRangeKernel(getCommandQueue(), selectKernel, 1, (const size_t[]){0}, 
(const 
size_t[]){ceil(dataCount/((float)WORK_GROUP_SIZE*VALUES_PER_WORK_ITEM))*(WORK_GROUP_SIZE*VALUES_PER_WORK_ITEM)},
 (const size_t[]){WORK_GROUP_SIZE}, 0, NULL, NULL);
                                        if(err)
                                                printf("#%s, 
clEnqueueNDRangeKernel: %s;\n", __func__, clError(err));
                                        if (synchronousGPU) 
clFinish(getCommandQueue());
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