patch 'app/testpmd: fix crash in multi-process forwarding' has been queued to stable release 23.11.1

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 23.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/31/24. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://git.dpdk.org/dpdk-stable/log/?h=23.11-staging

This queued commit can be viewed at:
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-staging&id=49b4ce1f949f50caa700026d9128b61231816504

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 49b4ce1f949f50caa700026d9128b61231816504 Mon Sep 17 00:00:00 2001
From: Dengdui Huang <huangdengdui at huawei.com>
Date: Tue, 30 Jan 2024 09:32:49 +0800
Subject: [PATCH] app/testpmd: fix crash in multi-process forwarding
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit b3a33138f317d1c651cd86f423cc703176eb7b07 ]

On multi-process scenario, each process creates flows based on the
number of queues. When nbcore is greater than 1, multiple cores may
use the same queue to forward packet, like:
dpdk-testpmd -a BDF --proc-type=auto -- -i --rxq=4 --txq=4
--nb-cores=2 --num-procs=2 --proc-id=0
testpmd> start
mac packet forwarding - ports=1 - cores=2 - streams=4 - NUMA support
enabled, MP allocation mode: native
Logical Core 2 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
  RX P=0/Q=1 (socket 0) -> TX P=0/Q=1 (socket 0) peer=02:00:00:00:00:00
Logical Core 3 (socket 0) forwards packets on 2 streams:
  RX P=0/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00
  RX P=0/Q=1 (socket 0) -> TX P=0/Q=1 (socket 0) peer=02:00:00:00:00:00

After this commit, the result will be:
dpdk-testpmd -a BDF --proc-type=auto -- -i --rxq=4 --txq=4
--nb-cores=2 --num-procs=2 --proc-id=0
testpmd> start
io packet forwarding - ports=1 - cores=2 - streams=2 - NUMA support
enabled, MP allocation mode: native
Logical Core 2 (socket 0) forwards packets on 1 streams:
  RX P=0/Q=0 (socket 2) -> TX P=0/Q=0 (socket 2) peer=02:00:00:00:00:00
Logical Core 3 (socket 0) forwards packets on 1 streams:
  RX P=0/Q=1 (socket 2) -> TX P=0/Q=1 (socket 2) peer=02:00:00:00:00:00

Fixes: a550baf24af9 ("app/testpmd: support multi-process")

Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
Acked-by: Chengwen Feng <fengchengwen at huawei.com>
Acked-by: Ferruh Yigit <ferruh.yigit at amd.com>
---
 app/test-pmd/config.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index cad7537bc6..2c4dedd603 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -4794,7 +4794,6 @@ rss_fwd_config_setup(void)
 	queueid_t  nb_q;
 	streamid_t  sm_id;
 	int start;
-	int end;

 	nb_q = nb_rxq;
 	if (nb_q > nb_txq)
@@ -4802,7 +4801,7 @@ rss_fwd_config_setup(void)
 	cur_fwd_config.nb_fwd_lcores = (lcoreid_t) nb_fwd_lcores;
 	cur_fwd_config.nb_fwd_ports = nb_fwd_ports;
 	cur_fwd_config.nb_fwd_streams =
-		(streamid_t) (nb_q * cur_fwd_config.nb_fwd_ports);
+		(streamid_t) (nb_q / num_procs * cur_fwd_config.nb_fwd_ports);

 	if (cur_fwd_config.nb_fwd_streams < cur_fwd_config.nb_fwd_lcores)
 		cur_fwd_config.nb_fwd_lcores =
@@ -4824,7 +4823,6 @@ rss_fwd_config_setup(void)
 	 * the 2~3 queue for secondary process.
 	 */
 	start = proc_id * nb_q / num_procs;
-	end = start + nb_q / num_procs;
 	rxp = 0;
 	rxq = start;
 	for (sm_id = 0; sm_id < cur_fwd_config.nb_fwd_streams; sm_id++) {
@@ -4843,8 +4841,6 @@ rss_fwd_config_setup(void)
 			continue;
 		rxp = 0;
 		rxq++;
-		if (rxq >= end)
-			rxq = start;
 	}
 }

--
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-05 17:39:33.997079900 +0800
+++ 0100-app-testpmd-fix-crash-in-multi-process-forwarding.patch	2024-03-05 17:39:30.873566496 +0800
@@ -1 +1 @@
-From b3a33138f317d1c651cd86f423cc703176eb7b07 Mon Sep 17 00:00:00 2001
+From 49b4ce1f949f50caa700026d9128b61231816504 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit b3a33138f317d1c651cd86f423cc703176eb7b07 ]
@@ -33 +35,0 @@
-Cc: stable at dpdk.org