Limit buffers sizes to leave some memory for the platform

Some conformance tests use directly the size returned by the runtime
for max memory size to allocate buffers.
This doesn't leave enough memory for the system to run the tests.

test_common/harness/deviceInfo.cpp

@@ -86,3 +86,42 @@ std::string get_device_name(cl_device_id device)
 {
     return get_device_info_string(device, CL_DEVICE_NAME);
 }
+
+cl_ulong get_device_info_max_size(cl_device_id device, cl_device_info info,
+                                  unsigned int divisor)
+{
+    int err;
+    cl_ulong max_size;
+
+    if (divisor == 0)
+    {
+        throw std::runtime_error("Allocation divisor should not be 0\n");
+    }
+
+    if ((err = clGetDeviceInfo(device, info, sizeof(max_size), &max_size, NULL))
+        != CL_SUCCESS)
+    {
+        throw std::runtime_error("clGetDeviceInfo failed\n");
+    }
+    return max_size / divisor;
+}
+
+cl_ulong get_device_info_max_mem_alloc_size(cl_device_id device,
+                                            unsigned int divisor)
+{
+    return get_device_info_max_size(device, CL_DEVICE_MAX_MEM_ALLOC_SIZE,
+                                    divisor);
+}
+
+cl_ulong get_device_info_global_mem_size(cl_device_id device,
+                                         unsigned int divisor)
+{
+    return get_device_info_max_size(device, CL_DEVICE_GLOBAL_MEM_SIZE, divisor);
+}
+
+cl_ulong get_device_info_max_constant_buffer_size(cl_device_id device,
+                                                  unsigned int divisor)
+{
+    return get_device_info_max_size(device, CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE,
+                                    divisor);
+}

test_common/harness/deviceInfo.h

@@ -42,4 +42,17 @@ std::string get_device_version_string(cl_device_id device);
 
 /* Returns a string containing the device name. */
 std::string get_device_name(cl_device_id device);
+
+/* We need to use a portion of available alloc size,
+ * divide it to leave some memory for the platform. */
+#define MAX_DEVICE_MEMORY_SIZE_DIVISOR (2)
+
+/* Get max allocation size. */
+cl_ulong get_device_info_max_mem_alloc_size(cl_device_id device,
+                                            unsigned int divisor = 1);
+cl_ulong get_device_info_global_mem_size(cl_device_id device,
+                                         unsigned int divisor = 1);
+cl_ulong get_device_info_max_constant_buffer_size(cl_device_id device,
+                                                  unsigned int divisor = 1);
+
 #endif // _deviceInfo_h

test_conformance/allocations/allocation_functions.cpp

@@ -141,19 +141,14 @@ int allocate_size(cl_context context, cl_command_queue *queue, cl_device_id devi
   // Set the number of mems used to 0 so if we fail to create even a single one we don't end up returning a garbage value
   *number_of_mems = 0;
 
-  error = clGetDeviceInfo(device_id, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof(max_individual_allocation_size), &max_individual_allocation_size, NULL);
-  test_error_abort( error, "clGetDeviceInfo failed for CL_DEVICE_MAX_MEM_ALLOC_SIZE");
-  error = clGetDeviceInfo(device_id, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof(global_mem_size), &global_mem_size, NULL);
-  test_error_abort( error, "clGetDeviceInfo failed for CL_DEVICE_GLOBAL_MEM_SIZE");
+  max_individual_allocation_size =
+      get_device_info_max_mem_alloc_size(device_id);
+  global_mem_size = get_device_info_global_mem_size(device_id);
 
   if (global_mem_size > (cl_ulong)SIZE_MAX) {
     global_mem_size = (cl_ulong)SIZE_MAX;
   }
 
-//  log_info("Device reports CL_DEVICE_MAX_MEM_ALLOC_SIZE=%llu bytes (%gMB), CL_DEVICE_GLOBAL_MEM_SIZE=%llu bytes (%gMB).\n",
-//           max_individual_allocation_size, toMB(max_individual_allocation_size),
-//           global_mem_size, toMB(global_mem_size));
-
   if (size_to_allocate > global_mem_size) {
     log_error("Can not allocate more than the global memory size.\n");
     return FAILED_ABORT;

test_conformance/allocations/main.cpp

@@ -43,16 +43,9 @@ static void printUsage( const char *execName );
 test_status init_cl( cl_device_id device ) {
     int error;
 
-    error = clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof(g_max_individual_allocation_size), &g_max_individual_allocation_size, NULL );
-    if ( error ) {
-        print_error( error, "clGetDeviceInfo failed for CL_DEVICE_MAX_MEM_ALLOC_SIZE");
-        return TEST_FAIL;
-    }
-    error = clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof(g_global_mem_size), &g_global_mem_size, NULL );
-    if ( error ) {
-        print_error( error, "clGetDeviceInfo failed for CL_DEVICE_GLOBAL_MEM_SIZE");
-        return TEST_FAIL;
-    }
+    g_max_individual_allocation_size =
+        get_device_info_max_mem_alloc_size(device);
+    g_global_mem_size = get_device_info_global_mem_size(device);
 
     log_info("Device reports CL_DEVICE_MAX_MEM_ALLOC_SIZE=%llu bytes (%gMB), CL_DEVICE_GLOBAL_MEM_SIZE=%llu bytes (%gMB).\n",
              llu( g_max_individual_allocation_size ), toMB( g_max_individual_allocation_size ),
@@ -94,6 +87,12 @@ test_status init_cl( cl_device_id device ) {
         g_global_mem_size *= 0.60;
     }
 
+    /* Cap the allocation size as the global size was deduced */
+    if (g_max_individual_allocation_size > g_global_mem_size)
+    {
+        g_max_individual_allocation_size = g_global_mem_size;
+    }
+
     if( gReSeed )
     {
         g_seed = RandomSeed( gRandomSeed );

test_conformance/api/test_api_min_max.cpp

@@ -491,12 +491,12 @@ int test_min_max_mem_alloc_size(cl_device_id deviceID, cl_context context, cl_co
     else
         requiredAllocSize = 128 * 1024 * 1024;
 
-    /* Get the max mem alloc size */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get max mem alloc size from device" );
-
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
-    test_error( error, "Unable to get global memory size from device" );
+    /* Get the max mem alloc size, limit the alloc to half of the available
+     * memory */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize = get_device_info_global_mem_size(deviceID,
+                                              MAX_DEVICE_MEMORY_SIZE_DIVISOR);
 
     if (memSize > (cl_ulong)SIZE_MAX) {
       memSize = (cl_ulong)SIZE_MAX;
@@ -594,8 +594,8 @@ int test_min_max_image_2d_width(cl_device_id deviceID, cl_context context, cl_co
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*1*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*1*4, maxAllocSize);
@@ -661,8 +661,8 @@ int test_min_max_image_2d_height(cl_device_id deviceID, cl_context context, cl_c
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*1*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*1*4, maxAllocSize);
@@ -718,8 +718,8 @@ int test_min_max_image_3d_width(cl_device_id deviceID, cl_context context, cl_co
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*2*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*2*4, maxAllocSize);
@@ -775,8 +775,8 @@ int test_min_max_image_3d_height(cl_device_id deviceID, cl_context context, cl_c
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*2*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*2*4, maxAllocSize);
@@ -833,8 +833,8 @@ int test_min_max_image_3d_depth(cl_device_id deviceID, cl_context context, cl_co
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*1*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*1*4, maxAllocSize);
@@ -889,8 +889,8 @@ int test_min_max_image_array_size(cl_device_id deviceID, cl_context context, cl_
     }
 
     /* Verify that we can actually allocate an image that large */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if ( (cl_ulong)maxDimension*1*4 > maxAllocSize ) {
         log_error("Can not allocate a large enough image (min size: %lld bytes, max allowed: %lld bytes) to test.\n",
                   (cl_ulong)maxDimension*1*4, maxAllocSize);
@@ -923,9 +923,9 @@ int test_min_max_image_buffer_size(cl_device_id deviceID, cl_context context, cl
 
     PASSIVE_REQUIRE_IMAGE_SUPPORT( deviceID );
 
-    /* Get the max memory allocation size */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof ( maxAllocSize ), &maxAllocSize, NULL );
-    test_error( error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE." );
+    /* Get the max memory allocation size, divide it */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
 
     /* Get the max image array width */
     error = clGetDeviceInfo( deviceID, CL_DEVICE_IMAGE_MAX_BUFFER_SIZE, sizeof( maxDimensionPixels ), &maxDimensionPixels, NULL );
@@ -1303,8 +1303,8 @@ int test_min_max_constant_buffer_size(cl_device_id deviceID, cl_context context,
     MTdata d;
 
     /* Verify our test buffer won't be bigger than allowed */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE, sizeof( maxSize ), &maxSize, 0 );
-    test_error( error, "Unable to get max constant buffer size" );
+    maxSize = get_device_info_max_constant_buffer_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
 
     if( ( 0 == gIsEmbedded && maxSize < 64L * 1024L ) || maxSize <  1L * 1024L )
     {
@@ -1314,16 +1314,14 @@ int test_min_max_constant_buffer_size(cl_device_id deviceID, cl_context context,
 
     log_info("Reported max constant buffer size of %lld bytes.\n", maxSize);
 
-    // Limit test buffer size to 1/8 of CL_DEVICE_GLOBAL_MEM_SIZE
-    error = clGetDeviceInfo(deviceID, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof(maxGlobalSize), &maxGlobalSize, 0);
-    test_error(error, "Unable to get CL_DEVICE_GLOBAL_MEM_SIZE");
+    // Limit test buffer size to 1/8 of global max size
+    maxGlobalSize = get_device_info_global_mem_size(deviceID, 8);
 
-    if (maxSize > maxGlobalSize / 8)
-        maxSize = maxGlobalSize / 8;
+    if (maxSize > maxGlobalSize) maxSize = maxGlobalSize;
+
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
 
-    error = clGetDeviceInfo(deviceID, CL_DEVICE_MAX_MEM_ALLOC_SIZE , sizeof(maxAllocSize), &maxAllocSize, 0);
-    test_error(error, "Unable to get CL_DEVICE_MAX_MEM_ALLOC_SIZE ");
-
     if (maxSize > maxAllocSize)
         maxSize = maxAllocSize;
 
@@ -1487,8 +1485,8 @@ int test_min_max_constant_args(cl_device_id deviceID, cl_context context, cl_com
         return -1;
     }
 
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE, sizeof( maxSize ), &maxSize, 0 );
-    test_error( error, "Unable to get max constant buffer size" );
+    maxSize = get_device_info_max_constant_buffer_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     individualBufferSize = ((int)maxSize/2)/maxArgs;
 
     log_info("Reported max constant arg count of %d and max constant buffer size of %d. Test will attempt to allocate half of that, or %d buffers of size %d.\n",

test_conformance/api/test_kernels.cpp

@@ -389,8 +389,8 @@ int test_set_kernel_arg_constant(cl_device_id deviceID, cl_context context, cl_c
     std::vector<cl_int> randomTestDataB(num_elements);
 
     /* Verify our test buffer won't be bigger than allowed */
-    error = clGetDeviceInfo( deviceID, CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE, sizeof( maxSize ), &maxSize, 0 );
-    test_error( error, "Unable to get max constant buffer size" );
+    maxSize = get_device_info_max_constant_buffer_size(
+        deviceID, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
     if (maxSize < sizeof(cl_int) * num_elements)
     {
         log_error( "ERROR: Unable to test constant argument to kernel: max size of constant buffer is reported as %d!\n", (int)maxSize );

test_conformance/images/clGetInfo/test_1D.cpp

@@ -40,13 +40,18 @@ int test_get_image_info_1D( cl_device_id device, cl_context context, cl_image_fo
     pixelSize = get_pixel_size( imageInfo.format );
 
     int error = clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_WIDTH, sizeof( maxWidth ), &maxWidth, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
     test_error( error, "Unable to get max image 1D size from device" );
 
-  if (memSize > (cl_ulong)SIZE_MAX) {
-    memSize = (cl_ulong)SIZE_MAX;
-  }
+    /* Reduce the size used by the test by half */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize =
+        get_device_info_global_mem_size(device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+
+    if (memSize > (cl_ulong)SIZE_MAX)
+    {
+        memSize = (cl_ulong)SIZE_MAX;
+    }
 
     if( gTestSmallImages )
     {

test_conformance/images/clGetInfo/test_1D_2D_array.cpp

@@ -38,13 +38,18 @@ int test_get_image_info_1D_array( cl_device_id device, cl_context context, cl_im
 
     int error = clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_WIDTH, sizeof( maxWidth ), &maxWidth, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE_MAX_ARRAY_SIZE, sizeof( maxArraySize ), &maxArraySize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
     test_error( error, "Unable to get max image 1D array size from device" );
 
-  if (memSize > (cl_ulong)SIZE_MAX) {
-    memSize = (cl_ulong)SIZE_MAX;
-  }
+    /* Reduce the size used by the test by half */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize =
+        get_device_info_global_mem_size(device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+
+    if (memSize > (cl_ulong)SIZE_MAX)
+    {
+        memSize = (cl_ulong)SIZE_MAX;
+    }
 
     if( gTestSmallImages )
     {
@@ -162,13 +167,18 @@ int test_get_image_info_2D_array( cl_device_id device, cl_context context, cl_im
     int error = clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_WIDTH, sizeof( maxWidth ), &maxWidth, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_HEIGHT, sizeof( maxHeight ), &maxHeight, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE_MAX_ARRAY_SIZE, sizeof( maxArraySize ), &maxArraySize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
     test_error( error, "Unable to get max image 1D array size from device" );
 
-  if (memSize > (cl_ulong)SIZE_MAX) {
-    memSize = (cl_ulong)SIZE_MAX;
-  }
+    /* Reduce the size used by the test by half */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize =
+        get_device_info_global_mem_size(device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+
+    if (memSize > (cl_ulong)SIZE_MAX)
+    {
+        memSize = (cl_ulong)SIZE_MAX;
+    }
 
     if( gTestSmallImages )
     {

test_conformance/images/clGetInfo/test_2D.cpp

@@ -279,13 +279,18 @@ int test_get_image_info_2D( cl_device_id device, cl_context context, cl_image_fo
 
     int error = clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_WIDTH, sizeof( maxWidth ), &maxWidth, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE2D_MAX_HEIGHT, sizeof( maxHeight ), &maxHeight, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
     test_error( error, "Unable to get max image 2D width or max image 3D height or max memory allocation size or global memory size from device" );
 
-  if (memSize > (cl_ulong)SIZE_MAX) {
-    memSize = (cl_ulong)SIZE_MAX;
-  }
+    /* Reduce the size used by the test by half */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize =
+        get_device_info_global_mem_size(device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+
+    if (memSize > (cl_ulong)SIZE_MAX)
+    {
+        memSize = (cl_ulong)SIZE_MAX;
+    }
 
     if( gTestSmallImages )
     {

test_conformance/images/clGetInfo/test_3D.cpp

@@ -41,13 +41,18 @@ int test_get_image_info_3D( cl_device_id device, cl_context context, cl_image_fo
     int error = clGetDeviceInfo( device, CL_DEVICE_IMAGE3D_MAX_WIDTH, sizeof( maxWidth ), &maxWidth, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE3D_MAX_HEIGHT, sizeof( maxHeight ), &maxHeight, NULL );
     error |= clGetDeviceInfo( device, CL_DEVICE_IMAGE3D_MAX_DEPTH, sizeof( maxDepth ), &maxDepth, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_MAX_MEM_ALLOC_SIZE, sizeof( maxAllocSize ), &maxAllocSize, NULL );
-    error |= clGetDeviceInfo( device, CL_DEVICE_GLOBAL_MEM_SIZE, sizeof( memSize ), &memSize, NULL );
     test_error( error, "Unable to get max image 3D size from device" );
 
-  if (memSize > (cl_ulong)SIZE_MAX) {
-    memSize = (cl_ulong)SIZE_MAX;
-  }
+    /* Reduce the size used by the test by half */
+    maxAllocSize = get_device_info_max_mem_alloc_size(
+        device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+    memSize =
+        get_device_info_global_mem_size(device, MAX_DEVICE_MEMORY_SIZE_DIVISOR);
+
+    if (memSize > (cl_ulong)SIZE_MAX)
+    {
+        memSize = (cl_ulong)SIZE_MAX;
+    }
 
     if( gTestSmallImages )
     {