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* [PATCH] app/dma-perf: fix physical address seg-fault
@ 2023-08-16  7:18 Vipin Varghese
  2023-08-16  7:26 ` [EXT] " Anoob Joseph
                   ` (3 more replies)
  0 siblings, 4 replies; 16+ messages in thread
From: Vipin Varghese @ 2023-08-16  7:18 UTC (permalink / raw)
  To: thomas, dev; +Cc: Ferruh.Yigit, cheng1.jiang, stable

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 VA address and not PA.

this fix checks the iova mode and invokes rte_memcpy with the right
arguments.

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 <vipin.varghese@amd.com>
---

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 | 39 +++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 9 deletions(-)

diff --git a/app/test-dma-perf/benchmark.c b/app/test-dma-perf/benchmark.c
index 0601e0d171..5573acc9f9 100644
--- a/app/test-dma-perf/benchmark.c
+++ b/app/test-dma-perf/benchmark.c
@@ -279,6 +279,10 @@ do_cpu_mem_copy(void *p)
 	struct rte_mbuf **srcs = para->srcs;
 	struct rte_mbuf **dsts = para->dsts;
 	uint32_t i;
+	bool isAddrPaMode = false;
+
+	if (rte_eal_iova_mode() == RTE_IOVA_PA)
+		isAddrPaMode = true;
 
 	worker_info->stop_flag = false;
 	worker_info->ready_flag = true;
@@ -286,16 +290,33 @@ do_cpu_mem_copy(void *p)
 	while (!worker_info->start_flag)
 		;
 
-	while (1) {
-		for (i = 0; i < nr_buf; i++) {
-			/* 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]),
-				(size_t)buf_size);
-			worker_info->total_cpl++;
+	if (true == isAddrPaMode) {
+		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(dst,
+					src,
+					(size_t)buf_size);
+				worker_info->total_cpl++;
+			}
+			if (worker_info->stop_flag)
+				break;
+		}
+	} else {
+		while (1) {
+			for (i = 0; i < nr_buf; i++) {
+				/* 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]),
+					(size_t)buf_size);
+				worker_info->total_cpl++;
+			}
+			if (worker_info->stop_flag)
+				break;
 		}
-		if (worker_info->stop_flag)
-			break;
 	}
 
 	return 0;
-- 
2.34.1


^ permalink raw reply	[flat|nested] 16+ messages in thread
* [PATCH v3] app/dma-perf: fix physical address seg-fault
@ 2023-10-19  4:16 Vipin Varghese
  2023-10-19  7:13 ` fengchengwen
  0 siblings, 1 reply; 16+ messages in thread
From: Vipin Varghese @ 2023-10-19  4:16 UTC (permalink / raw)
  To: cheng1.jiang, stable, anoobj, jerinj, dev

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 <vipin.varghese@amd.com>
Suggested-by: Anoob Joseph <anoobj@marvell.com>
Suggested-by: Jerin Jacob <jerinj@marvell.com>

---

v2:
 - suggest use of pktmbuf_mtod for both va and pa by Anoob.

V3:
 - add const to src suggested by Jerin.
---
 app/test-dma-perf/benchmark.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/app/test-dma-perf/benchmark.c b/app/test-dma-perf/benchmark.c
index 0601e0d171..9b1f58c78c 100644
--- a/app/test-dma-perf/benchmark.c
+++ b/app/test-dma-perf/benchmark.c
@@ -288,10 +288,11 @@ do_cpu_mem_copy(void *p)
 
 	while (1) {
 		for (i = 0; i < nr_buf; i++) {
+			const 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]),
-				(size_t)buf_size);
+			rte_memcpy(dst, src, (size_t)buf_size);
 			worker_info->total_cpl++;
 		}
 		if (worker_info->stop_flag)
-- 
2.34.1


^ permalink raw reply	[flat|nested] 16+ messages in thread
end of thread, other threads:[~2023-11-14 14:27 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-08-16  7:18 [PATCH] app/dma-perf: fix physical address seg-fault Vipin Varghese
2023-08-16  7:26 ` [EXT] " Anoob Joseph
2023-08-16  7:31   ` Varghese, Vipin
2023-08-16  9:24 ` [PATCH v2] " Vipin Varghese
2023-08-16  9:35 ` Vipin Varghese
2023-08-16  9:42 ` Vipin Varghese
2023-08-16 10:12   ` Jerin Jacob
2023-08-16 10:46   ` [EXT] " Anoob Joseph
2023-09-21  2:28   ` Jiang, Cheng1
2023-10-04  9:00     ` Varghese, Vipin
2023-10-04 13:00       ` Jerin Jacob
2023-10-19  4:19   ` [PATCH v3] " Vipin Varghese
2023-10-24  2:16     ` lihuisong (C)
2023-11-14 14:27       ` Thomas Monjalon
2023-10-19  4:16 Vipin Varghese
2023-10-19  7:13 ` fengchengwen

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