kfdtest: Make queue evict tests use constant number of wavefronts.

Previously, KFDEvictTest.QueueTest and KFDSVMEvictTest.QueueTest
would create a variable number of wavefronts, one for each 64MB
of memory under test. This ran into limits on the buffers used
by the wavefronts, and may at some point have exceeded the
wavefront limit.

Restrict the number of wavefronts to 512, and adjust the shader
to accomodate a variable buffer size

Signed-off-by: David Francis <David.Francis@amd.com>
Change-Id: I2ec292e2900e2efa62a08313bca3d2f4bdabca8b

tests/kfdtest/src/KFDEvictTest.cpp

@@ -33,6 +33,7 @@
 #define N_PROCESSES             (2)     /* Number of processes running in parallel, must be at least 2 */
 #define ALLOCATE_BUF_SIZE_MB    (64)
 #define ALLOCATE_RETRY_TIMES    (3)
+#define MAX_WAVEFRONTS          (512)
 
 #define SDMA_NOP  0x0
 
@@ -382,7 +383,7 @@ TEST_F(KFDEvictTest, QueueTest) {
 
     HSAuint32 defaultGPUNode = m_NodeInfo.HsaDefaultGPUNode();
     ASSERT_GE(defaultGPUNode, 0) << "failed to get default GPU Node";
-    HSAuint64 vramBufSize = ALLOCATE_BUF_SIZE_MB * 1024 * 1024;
+    unsigned int count = MAX_WAVEFRONTS;
 
     const HsaNodeProperties *pNodeProperties = m_NodeInfo.HsaDefaultGPUNodeProperties();
 
@@ -406,9 +407,10 @@ TEST_F(KFDEvictTest, QueueTest) {
 
     // Use 7/8 of VRAM between all processes
     HSAuint64 testSize = vramSize * 7 / 8;
-    HSAuint32 count = testSize / (vramBufSize * N_PROCESSES);
+    HSAuint32 vramBufSize = testSize / (count * N_PROCESSES);
+    vramBufSize = (vramBufSize / (1024 * 1024)) * (1024 * 1024);
 
-    if (count == 0) {
+    if (vramBufSize == 0) {
         LOG() << "Skipping test: Not enough system memory available." << std::endl;
         return;
     }
@@ -455,6 +457,9 @@ TEST_F(KFDEvictTest, QueueTest) {
     for (i = 0; i < wavefront_num; i++)
         *(localBufAddr + i) = pBuffers[i];
 
+    for (i = 0; i < wavefront_num; i++)
+        *(result + i) = vramBufSize;
+
     dispatch0.SetArgs(localBufAddr, result);
     dispatch0.SetDim(wavefront_num, 1, 1);
     /* Submit the packet and start shader */