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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Aug 2023 09:35:54.0673 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 709086b5-071a-4662-cec4-08db9e3c2fe1 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE36.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4557 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org do_cpu_mem_copy uses DPDK API rte_mbuf_data_iova to return the start of the virtual address for both src and dst. But in case of iova mode set as PA, this results in seg-fault. This is because rte_memcpy uses VA address and not PA. This fix invokes `rte_pktmbuf_mtod` for both src and dst. Bugzilla ID: 1269 Fixes: 623dc9364dc6 ("app/dma-perf: introduce DMA performance test") Cc: cheng1.jiang@intel.com Cc: stable@dpdk.org Signed-off-by: Vipin Varghese Suggested-by: Anoob Joseph --- v2: - suggest use of pktmbuf_mtod for both va and pa. tested for both va and pa CMD: PA: dpdk-test-dma-perf --iova-mode=pa -- --config test.ini VA: dpdk-test-dma-perf --iova-mode=va -- --config test.ini DC: dpdk-test-dma-perf --iova-mode=dc -- --config test.ini Log: fails for dc mode `EAL: invalid parameters for --iova-mode` test.ini: ``` [case1] type=CPU_MEM_COPY mem_size=10 buf_size=64,8192,2,MUL src_numa_node=0 dst_numa_node=0 cache_flush=0 test_seconds=2 lcore = 7 eal_args=--in-memory --no-pci ``` --- app/test-dma-perf/benchmark.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/app/test-dma-perf/benchmark.c b/app/test-dma-perf/benchmark.c index 0601e0d171..9059253057 100644 --- a/app/test-dma-perf/benchmark.c +++ b/app/test-dma-perf/benchmark.c @@ -288,9 +288,12 @@ do_cpu_mem_copy(void *p) while (1) { for (i = 0; i < nr_buf; i++) { + void *src = rte_pktmbuf_mtod(dsts[i], void *); + void *dst = rte_pktmbuf_mtod(srcs[i], void *); + /* copy buffer form src to dst */ - rte_memcpy((void *)(uintptr_t)rte_mbuf_data_iova(dsts[i]), - (void *)(uintptr_t)rte_mbuf_data_iova(srcs[i]), + rte_memcpy(dst, + src, (size_t)buf_size); worker_info->total_cpl++; } -- 2.34.1