[Beignet] [PATCH] Runtime: refine max group size for SKL & KBL

[rander.wang]

	Now change max group size to 256. it is a reasonable
	size for Gen9. According to performance test, 256 make
	good progress in openCV and no regression. So change it

Signed-off-by: rander.wang <rander.wang at intel.com>
---
 src/cl_device_id.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/cl_device_id.c b/src/cl_device_id.c
index 6cba2b5..5ea13a9 100644
--- a/src/cl_device_id.c
+++ b/src/cl_device_id.c
@@ -149,7 +149,7 @@ static struct _cl_device_id intel_skl_gt1_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 2,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -159,7 +159,7 @@ static struct _cl_device_id intel_skl_gt2_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 3,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -169,7 +169,7 @@ static struct _cl_device_id intel_skl_gt3_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 6,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -179,7 +179,7 @@ static struct _cl_device_id intel_skl_gt4_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 9,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -209,7 +209,7 @@ static struct _cl_device_id intel_kbl_gt1_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 2,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -219,7 +219,7 @@ static struct _cl_device_id intel_kbl_gt15_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 3,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -229,7 +229,7 @@ static struct _cl_device_id intel_kbl_gt2_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 3,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -239,7 +239,7 @@ static struct _cl_device_id intel_kbl_gt3_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 6,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
@@ -249,7 +249,7 @@ static struct _cl_device_id intel_kbl_gt4_device = {
   .max_thread_per_unit = 7,
   .sub_slice_count = 9,
   .max_work_item_sizes = {512, 512, 512},
-  .max_work_group_size = 512,
+  .max_work_group_size = 256,
   .max_clock_frequency = 1000,
 #include "cl_gen9_device.h"
 };
-- 
2.7.4