From: Stephen Hemminger <stephen@networkplumber.org>
To: Zhihong Wang <zhihong.wang@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd
Date: Sun, 27 Dec 2015 13:49:04 -0800 [thread overview]
Message-ID: <20151227134904.3fd9ecce@xeon-e3> (raw)
In-Reply-To: <1451011032-83106-3-git-send-email-zhihong.wang@intel.com>
On Thu, 24 Dec 2015 21:37:11 -0500
Zhihong Wang <zhihong.wang@intel.com> wrote:
> Handle SIGINT and SIGTERM in l2fwd.
>
> Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
> ---
> examples/l2fwd/main.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 60 insertions(+)
>
> diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
> index 720fd5a..75899dd 100644
> --- a/examples/l2fwd/main.c
> +++ b/examples/l2fwd/main.c
> @@ -44,6 +44,8 @@
> #include <ctype.h>
> #include <errno.h>
> #include <getopt.h>
> +#include <signal.h>
> +#include <unistd.h>
>
> #include <rte_common.h>
> #include <rte_log.h>
> @@ -69,6 +71,9 @@
> #include <rte_mempool.h>
> #include <rte_mbuf.h>
>
> +static int force_quit = -1;
> +static int signo_quit = -1;
These need to be volatile otherwise you risk compiler optimizing
away your checks.
Also, don't use -1/0 just use 0/1 for boolean or better yet
the definition in <stdbool.h> of bool and true/false.
That way the code can read much nicer.
> #define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
>
> #define NB_MBUF 8192
> @@ -284,6 +289,8 @@ l2fwd_main_loop(void)
> }
>
> while (1) {
> + if (unlikely(force_quit != 0))
> + break;
Please maske this a proper while loop instead.
while (!force_quit) {
>
> cur_tsc = rte_rdtsc();
>
> @@ -534,6 +541,45 @@ check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
> }
> }
>
> +static void
> +stop_ports(void)
> +{
> + unsigned portid, nb_ports;
> +
> + nb_ports = rte_eth_dev_count();
> + for (portid = 0; portid < nb_ports; portid++) {
> + if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
> + continue;
> + }
No need for {} here.
> + printf("Stopping port %d...", portid);
> + rte_eth_dev_stop(portid);
> + rte_eth_dev_close(portid);
> + printf(" Done\n");
> + }
> +}
> +
> +static void
> +signal_handler(__rte_unused int signum)
> +{
> + if (signum == SIGINT || signum == SIGTERM) {
signum is used, dont give __rte_unused attribute.
>
> /* launch per-lcore init on every lcore */
> + force_quit = 0;
What is gained by having tri-value here. Just initialize it as false.
> rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
> RTE_LCORE_FOREACH_SLAVE(lcore_id) {
> if (rte_eal_wait_lcore(lcore_id) < 0)
> return -1;
> }
>
> + printf("Stopping forwarding... Done\n");
> + /* stop ports */
> + stop_ports();
> + printf("Bye...\n");
> + /* inform if there's a caller */
> + if (force_quit != 0) {
> + signal(signo_quit, SIG_DFL);
> + kill(getpid(), signo_quit);
The kill should not be needed.
It would be good if examples cleaned up allocations, that way they
could be used with valgrind for validation of drivers, etc.
next prev parent reply other threads:[~2015-12-27 21:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-25 2:37 [dpdk-dev] [PATCH v2 0/3] Handle SIGINT and SIGTERM in DPDK examples Zhihong Wang
2015-12-25 2:37 ` [dpdk-dev] [PATCH v2 1/3] app/test-pmd: Handle SIGINT and SIGTERM in testpmd Zhihong Wang
2015-12-27 21:42 ` Stephen Hemminger
2015-12-28 1:37 ` Wang, Zhihong
2015-12-25 2:37 ` [dpdk-dev] [PATCH v2 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd Zhihong Wang
2015-12-27 21:49 ` Stephen Hemminger [this message]
2015-12-28 1:35 ` Wang, Zhihong
2015-12-25 2:37 ` [dpdk-dev] [PATCH v2 3/3] examples/l3fwd: Handle SIGINT and SIGTERM in l3fwd Zhihong Wang
2015-12-28 4:17 ` [dpdk-dev] [PATCH v2 0/3] Handle SIGINT and SIGTERM in DPDK examples Qiu, Michael
2015-12-28 9:51 ` Wang, Zhihong
2015-12-29 1:20 ` [dpdk-dev] [PATCH v3 " Zhihong Wang
2015-12-29 1:20 ` [dpdk-dev] [PATCH v3 1/3] app/test-pmd: Handle SIGINT and SIGTERM in testpmd Zhihong Wang
2015-12-29 1:20 ` [dpdk-dev] [PATCH v3 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd Zhihong Wang
2015-12-30 17:35 ` Stephen Hemminger
2015-12-29 1:20 ` [dpdk-dev] [PATCH v3 3/3] examples/l3fwd: Handle SIGINT and SIGTERM in l3fwd Zhihong Wang
2015-12-29 13:34 ` Ananyev, Konstantin
2015-12-30 3:15 ` Wang, Zhihong
2015-12-30 11:29 ` Ananyev, Konstantin
2015-12-31 2:14 ` Wang, Zhihong
2015-12-30 17:37 ` Stephen Hemminger
2015-12-29 23:27 ` [dpdk-dev] [PATCH v4 0/3] Handle SIGINT and SIGTERM in DPDK examples Zhihong Wang
2015-12-29 23:27 ` [dpdk-dev] [PATCH v4 1/3] app/test-pmd: Handle SIGINT and SIGTERM in testpmd Zhihong Wang
2015-12-29 23:27 ` [dpdk-dev] [PATCH v4 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd Zhihong Wang
2015-12-29 23:27 ` [dpdk-dev] [PATCH v4 3/3] examples/l3fwd: Handle SIGINT and SIGTERM in l3fwd Zhihong Wang
2015-12-30 13:37 ` Ananyev, Konstantin
2015-12-31 1:44 ` Wang, Zhihong
2015-12-31 2:09 ` Stephen Hemminger
2015-12-31 2:20 ` Wang, Zhihong
2015-12-30 21:59 ` [dpdk-dev] [PATCH v5 0/3] Handle SIGINT and SIGTERM in DPDK examples Zhihong Wang
2015-12-30 21:59 ` [dpdk-dev] [PATCH v5 1/3] app/test-pmd: Handle SIGINT and SIGTERM in testpmd Zhihong Wang
2015-12-30 21:59 ` [dpdk-dev] [PATCH v5 2/3] examples/l2fwd: Handle SIGINT and SIGTERM in l2fwd Zhihong Wang
2015-12-31 17:01 ` Stephen Hemminger
2016-01-04 2:00 ` Wang, Zhihong
2015-12-30 21:59 ` [dpdk-dev] [PATCH v5 3/3] examples/l3fwd: Handle SIGINT and SIGTERM in l3fwd Zhihong Wang
2016-01-06 13:51 ` Ananyev, Konstantin
2016-01-27 16:34 ` [dpdk-dev] [PATCH v5 0/3] Handle SIGINT and SIGTERM in DPDK examples Thomas Monjalon
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=20151227134904.3fd9ecce@xeon-e3 \
--to=stephen@networkplumber.org \
--cc=dev@dpdk.org \
--cc=zhihong.wang@intel.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).