Re: [PATCH v4] app/eventdev: use proper teardown sequence

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

-----Original Message-----
> Date: Tue, 24 Jul 2018 21:09:50 +0530
> From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> To: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4] app/eventdev: use proper teardown
>  sequence
> User-Agent: Mutt/1.10.1 (2018-07-13)
> 
> -----Original Message-----
> > Date: Tue, 24 Jul 2018 17:44:50 +0530
> > From: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> > To: jerin.jacob@caviumnetworks.com
> > Cc: dev@dpdk.org, Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> > Subject: [dpdk-dev] [PATCH v4] app/eventdev: use proper teardown sequence
> > X-Mailer: git-send-email 2.18.0
> > 
> > Use proper teardown sequence when SIGINT is caught to prevent
> > eventdev from going into undefined state.
> > 
> > Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> 
> Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

Applied to dpdk-next-eventdev/master. Thanks.

> 
> > ---
> >  v4 Changes:
> >  - Check opts before closing ethdev.
> > 
> >  v3 Changes:
> >  - Segregate ethdev_stop and close to prevent possible SEGFAULT.
> >  - handle early shutdown.
> > 
> >  v2 Changes:
> >  - Only stopping the ethdev(producer) is sufficient.(Jerin)
> > 
> >  app/test-eventdev/evt_main.c             | 42 +++++++++++++++---------
> >  app/test-eventdev/test_perf_common.c     |  1 -
> >  app/test-eventdev/test_pipeline_common.c |  1 -
> >  3 files changed, 27 insertions(+), 17 deletions(-)
> > 
> > diff --git a/app/test-eventdev/evt_main.c b/app/test-eventdev/evt_main.c
> > index 57bb94570..a8d304bab 100644
> > --- a/app/test-eventdev/evt_main.c
> > +++ b/app/test-eventdev/evt_main.c
> > @@ -20,29 +20,41 @@ struct evt_test *test;
> >  static void
> >  signal_handler(int signum)
> >  {
> > -	if (signum == SIGINT || signum == SIGTERM) {
> > +	int i;
> > +	static uint8_t once;
> > +
> > +	if ((signum == SIGINT || signum == SIGTERM) && !once) {
> > +		once = true;
> >  		printf("\nSignal %d received, preparing to exit...\n",
> >  				signum);
> > -		/* request all lcores to exit from the main loop */
> > -		*(int *)test->test_priv = true;
> > -		rte_wmb();
> > 
> > -		rte_eal_mp_wait_lcore();
> > +		if (test != NULL) {
> > +			/* request all lcores to exit from the main loop */
> > +			*(int *)test->test_priv = true;
> > +			rte_wmb();
> > +
> > +			if (test->ops.ethdev_destroy)
> > +				test->ops.ethdev_destroy(test, &opt);
> > 
> > -		if (test->ops.test_result)
> > -			test->ops.test_result(test, &opt);
> > +			rte_eal_mp_wait_lcore();
> > 
> > -		if (test->ops.eventdev_destroy)
> > -			test->ops.eventdev_destroy(test, &opt);
> > +			if (test->ops.test_result)
> > +				test->ops.test_result(test, &opt);
> > 
> > -		if (test->ops.ethdev_destroy)
> > -			test->ops.ethdev_destroy(test, &opt);
> > +			if (opt.prod_type == EVT_PROD_TYPE_ETH_RX_ADPTR) {
> > +				RTE_ETH_FOREACH_DEV(i)
> > +					rte_eth_dev_close(i);
> > +			}
> > 
> > -		if (test->ops.mempool_destroy)
> > -			test->ops.mempool_destroy(test, &opt);
> > +			if (test->ops.eventdev_destroy)
> > +				test->ops.eventdev_destroy(test, &opt);
> > 
> > -		if (test->ops.test_destroy)
> > -			test->ops.test_destroy(test, &opt);
> > +			if (test->ops.mempool_destroy)
> > +				test->ops.mempool_destroy(test, &opt);
> > +
> > +			if (test->ops.test_destroy)
> > +				test->ops.test_destroy(test, &opt);
> > +		}
> > 
> >  		/* exit with the expected status */
> >  		signal(signum, SIG_DFL);
> > diff --git a/app/test-eventdev/test_perf_common.c b/app/test-eventdev/test_perf_common.c
> > index d00f91802..6d39f98e0 100644
> > --- a/app/test-eventdev/test_perf_common.c
> > +++ b/app/test-eventdev/test_perf_common.c
> > @@ -743,7 +743,6 @@ void perf_ethdev_destroy(struct evt_test *test, struct evt_options *opt)
> >  		RTE_ETH_FOREACH_DEV(i) {
> >  			rte_event_eth_rx_adapter_stop(i);
> >  			rte_eth_dev_stop(i);
> > -			rte_eth_dev_close(i);
> >  		}
> >  	}
> >  }
> > diff --git a/app/test-eventdev/test_pipeline_common.c b/app/test-eventdev/test_pipeline_common.c
> > index 719518ff3..96e7c9882 100644
> > --- a/app/test-eventdev/test_pipeline_common.c
> > +++ b/app/test-eventdev/test_pipeline_common.c
> > @@ -467,7 +467,6 @@ pipeline_ethdev_destroy(struct evt_test *test, struct evt_options *opt)
> >  	RTE_ETH_FOREACH_DEV(i) {
> >  		rte_event_eth_rx_adapter_stop(i);
> >  		rte_eth_dev_stop(i);
> > -		rte_eth_dev_close(i);
> >  	}
> >  }
> > 
> > --
> > 2.18.0
> >