[v1,2/3] app/test-gpudev: test aligned memory allocation
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Commit Message
From: Elena Agostini <eagostini@nvidia.com>
Update gpudev app to test GPU memory aligned allocation.
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
---
app/test-gpudev/main.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
@@ -69,11 +69,12 @@ alloc_gpu_memory(uint16_t gpu_id)
void *ptr_2 = NULL;
size_t buf_bytes = 1024;
int ret;
+ unsigned align = 4096;
printf("\n=======> TEST: Allocate GPU memory\n\n");
- /* Alloc memory on GPU 0 */
- ptr_1 = rte_gpu_mem_alloc(gpu_id, buf_bytes);
+ /* Alloc memory on GPU 0 without any specific alignment */
+ ptr_1 = rte_gpu_mem_alloc(gpu_id, buf_bytes, 0);
if (ptr_1 == NULL) {
fprintf(stderr, "rte_gpu_mem_alloc GPU memory returned error\n");
goto error;
@@ -81,7 +82,8 @@ alloc_gpu_memory(uint16_t gpu_id)
printf("GPU memory allocated at 0x%p size is %zd bytes\n",
ptr_1, buf_bytes);
- ptr_2 = rte_gpu_mem_alloc(gpu_id, buf_bytes);
+ /* Alloc memory on GPU 0 with 4kB alignment */
+ ptr_2 = rte_gpu_mem_alloc(gpu_id, buf_bytes, align);
if (ptr_2 == NULL) {
fprintf(stderr, "rte_gpu_mem_alloc GPU memory returned error\n");
goto error;
@@ -89,6 +91,11 @@ alloc_gpu_memory(uint16_t gpu_id)
printf("GPU memory allocated at 0x%p size is %zd bytes\n",
ptr_2, buf_bytes);
+ if (((uintptr_t)ptr_2) % align) {
+ fprintf(stderr, "Memory address 0x%p is not aligned to %u\n", ptr_2, align);
+ goto error;
+ }
+
ret = rte_gpu_mem_free(gpu_id, (uint8_t *)(ptr_1)+0x700);
if (ret < 0) {
printf("GPU memory 0x%p NOT freed: GPU driver didn't find this memory address internally.\n",