patches for DPDK stable branches
 help / color / mirror / Atom feed
From: Feifei Wang <feifei.wang2@arm.com>
To: Harry van Haaren <harry.van.haaren@intel.com>,
	Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>,
	Nikhil Rao <nikhil.rao@intel.com>
Cc: dev@dpdk.org, nd@arm.com, Feifei Wang <feifei.wang2@arm.com>,
	pbhagavatula@marvell.com, stable@dpdk.org,
	Ruifeng Wang <ruifeng.wang@arm.com>,
	Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Subject: [dpdk-stable] [PATCH v4 3/3] examples/eventdev: move eth stop to the end
Date: Thu, 14 Jan 2021 18:31:01 +0800
Message-ID: <20210114103101.738262-4-feifei.wang2@arm.com> (raw)
In-Reply-To: <20210114103101.738262-1-feifei.wang2@arm.com>

Move eth stop code from "signal_handler" function to the end of "main"
function. There are two reasons for this:

First, this improves code maintenance and makes code look simple and
clear. Based on this change, after receiving the interrupt signal,
"fdata->done" is set as 1. Then the main thread will wait all worker
lcores to jump out of the loop. Finally, the main thread will stop and
then close eth dev port.

Second, for older version, the main thread first stops eth dev port and
then waits the end of worker lcore. This may cause errors because it may
stop the eth dev port which worker lcores are using. This moving change
can fix this by waiting all worker threads to exit and then stop the
eth dev port.

In the meanwhile, remove wmb in signal_handler.

This is because when the main lcore receive the stop signal, it stores 1
into fdata->done. And then the worker lcores load "fdata->done" and jump
out of the loop to stop running. Nothing should be stored after updating
fdata->done, so the wmb is unnecessary.

Fixes: 085edac2ca38 ("examples/eventdev_pipeline: support Tx adapter")
Cc: pbhagavatula@marvell.com
Cc: stable@dpdk.org

Suggested-by: Ruifeng Wang <ruifeng.wang@arm.com>
Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
---
 examples/eventdev_pipeline/main.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/examples/eventdev_pipeline/main.c b/examples/eventdev_pipeline/main.c
index 3526d4d3d..4621e8a89 100644
--- a/examples/eventdev_pipeline/main.c
+++ b/examples/eventdev_pipeline/main.c
@@ -311,7 +311,6 @@ static void
 signal_handler(int signum)
 {
 	static uint8_t once;
-	uint16_t portid;
 
 	if (fdata->done)
 		rte_exit(1, "Exiting on signal %d\n", signum);
@@ -322,17 +321,6 @@ signal_handler(int signum)
 			rte_event_dev_dump(0, stdout);
 		once = 1;
 		fdata->done = 1;
-		rte_smp_wmb();
-
-		RTE_ETH_FOREACH_DEV(portid) {
-			rte_event_eth_rx_adapter_stop(portid);
-			rte_event_eth_tx_adapter_stop(portid);
-			if (rte_eth_dev_stop(portid) < 0)
-				printf("Failed to stop port %u", portid);
-		}
-
-		rte_eal_mp_wait_lcore();
-
 	}
 	if (signum == SIGTSTP)
 		rte_event_dev_dump(0, stdout);
@@ -483,6 +471,10 @@ main(int argc, char **argv)
 	}
 
 	RTE_ETH_FOREACH_DEV(portid) {
+		rte_event_eth_rx_adapter_stop(portid);
+		rte_event_eth_tx_adapter_stop(portid);
+		if (rte_eth_dev_stop(portid) < 0)
+			printf("Failed to stop port %u", portid);
 		rte_eth_dev_close(portid);
 	}
 
-- 
2.25.1


  parent reply	other threads:[~2021-01-14 10:31 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-21  5:34 [dpdk-stable] [PATCH] " Feifei Wang
2020-12-21  9:32 ` [dpdk-stable] [PATCH v2] " Feifei Wang
2020-12-21  9:56 ` [dpdk-stable] [PATCH] " Van Haaren, Harry
2020-12-22  5:31   ` [dpdk-stable] 回复: " Feifei Wang
2021-01-05  5:14 ` [dpdk-stable] [PATCH v3] examples/eventdev: refactor ethdev port stop Feifei Wang
2021-01-05 10:09   ` [dpdk-stable] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-14  6:24     ` [dpdk-stable] 回复: " Feifei Wang
2021-01-14  8:50       ` Feifei Wang
     [not found] ` <20210114103101.738262-1-feifei.wang2@arm.com>
2021-01-14 10:30   ` [dpdk-stable] [PATCH v4 1/3] doc: fix core enabled bug for eventdev pipeline example Feifei Wang
2021-01-14 10:31   ` [dpdk-stable] [PATCH v4 2/3] examples/eventdev: add info output for main core Feifei Wang
2021-01-14 10:31   ` Feifei Wang [this message]
2021-01-25 17:51     ` [dpdk-stable] [EXT] [PATCH v4 3/3] examples/eventdev: move eth stop to the end Pavan Nikhilesh Bhagavatula
2021-01-26 13:37       ` [dpdk-stable] [dpdk-dev] " Jerin Jacob

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210114103101.738262-4-feifei.wang2@arm.com \
    --to=feifei.wang2@arm.com \
    --cc=dev@dpdk.org \
    --cc=harry.van.haaren@intel.com \
    --cc=honnappa.nagarahalli@arm.com \
    --cc=nd@arm.com \
    --cc=nikhil.rao@intel.com \
    --cc=pbhagavatula@caviumnetworks.com \
    --cc=pbhagavatula@marvell.com \
    --cc=ruifeng.wang@arm.com \
    --cc=stable@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

patches for DPDK stable branches

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/stable/0 stable/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 stable stable/ https://inbox.dpdk.org/stable \
		stable@dpdk.org
	public-inbox-index stable

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.stable


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git