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From: <eagostini@nvidia.com>
To: <dev@dpdk.org>
CC: Elena Agostini <eagostini@nvidia.com>
Subject: [PATCH v4 2/2] app/test-gpudev: test cpu_map/cpu_unmap functions
Date: Thu, 27 Jan 2022 03:47:16 +0000
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From: Elena Agostini <eagostini@nvidia.com>
New test case added to test the gpudev cpu_map/cpu_unmap functions.
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
---
app/test-gpudev/main.c | 63 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/app/test-gpudev/main.c b/app/test-gpudev/main.c
index 4500a8660b..3d0c17d8fd 100644
--- a/app/test-gpudev/main.c
+++ b/app/test-gpudev/main.c
@@ -185,6 +185,68 @@ register_cpu_memory(uint16_t gpu_id)
return -1;
}
+static int
+gpu_mem_cpu_map(uint16_t gpu_id)
+{
+ void *ptr_gpu = NULL;
+ void *ptr_cpu = NULL;
+ size_t buf_bytes = 1024;
+ unsigned int align = 4096;
+ int ret;
+
+ printf("\n=======> TEST: Map GPU memory for CPU visibility\n\n");
+
+ /* Alloc memory on GPU 0 with 4kB alignment */
+ ptr_gpu = rte_gpu_mem_alloc(gpu_id, buf_bytes, align);
+ if (ptr_gpu == NULL) {
+ fprintf(stderr, "rte_gpu_mem_alloc GPU memory returned error\n");
+ goto error;
+ }
+ printf("GPU memory allocated at 0x%p size is %zd bytes\n",
+ ptr_gpu, buf_bytes);
+
+ ptr_cpu = rte_gpu_mem_cpu_map(gpu_id, buf_bytes, ptr_gpu);
+ if (ptr_cpu == NULL) {
+ fprintf(stderr, "rte_gpu_mem_cpu_map returned error\n");
+ goto error;
+ }
+ printf("GPU memory mapped for CPU access at 0x%p\n", ptr_cpu);
+
+ ((uint8_t*)ptr_cpu)[0] = 0x4;
+ ((uint8_t*)ptr_cpu)[1] = 0x5;
+ ((uint8_t*)ptr_cpu)[2] = 0x6;
+
+ printf("GPU memory first 3 bytes set from CPU: %x %x %x\n",
+ ((uint8_t*)ptr_cpu)[0],
+ ((uint8_t*)ptr_cpu)[1],
+ ((uint8_t*)ptr_cpu)[2]);
+
+ ret = rte_gpu_mem_cpu_unmap(gpu_id, ptr_cpu);
+ if (ret < 0) {
+ fprintf(stderr, "rte_gpu_mem_cpu_unmap returned error %d\n", ret);
+ goto error;
+ }
+ printf("GPU memory mapped for CPU access at 0x%p\n", ptr_cpu);
+
+ ret = rte_gpu_mem_free(gpu_id, ptr_gpu);
+ if (ret < 0) {
+ fprintf(stderr, "rte_gpu_mem_free returned error %d\n", ret);
+ goto error;
+ }
+ printf("GPU memory 0x%p freed\n", ptr_gpu);
+
+ printf("\n=======> TEST: PASSED\n");
+ return 0;
+
+error:
+
+ rte_gpu_mem_cpu_unmap(gpu_id, ptr_cpu);
+ rte_gpu_mem_free(gpu_id, ptr_gpu);
+
+ printf("\n=======> TEST: FAILED\n");
+ return -1;
+}
+
static int
create_update_comm_flag(uint16_t gpu_id)
{
@@ -402,6 +464,7 @@ main(int argc, char **argv)
*/
alloc_gpu_memory(gpu_id);
register_cpu_memory(gpu_id);
+ gpu_mem_cpu_map(gpu_id);
/**
* Communication items test
--
2.17.1