patches for DPDK stable branches
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From: Thomas Monjalon <thomas@monjalon.net>
To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	Rakesh Kudurumalla <rkudurumalla@marvell.com>
Cc: "stable@dpdk.org" <stable@dpdk.org>,
	"dev@dpdk.org" <dev@dpdk.org>,
	"david.marchand@redhat.com" <david.marchand@redhat.com>,
	"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
	"andrew.rybchenko@oktetlabs.ru" <andrew.rybchenko@oktetlabs.ru>,
	"ajit.khaparde@broadcom.com" <ajit.khaparde@broadcom.com>
Subject: Re: [EXT] Re: [dpdk-stable] [PATCH v2] test: avoid hang if queues are full and Tx fails
Date: Tue, 01 Feb 2022 08:44:45 +0100
Message-ID: <3120644.AJdgDx1Vlc@thomas> (raw)
In-Reply-To: <BN8PR18MB248252B7B98FFEB2FDE77C13CF269@BN8PR18MB2482.namprd18.prod.outlook.com>

octeontx2 driver is removed
Can we close this patch?


01/02/2022 07:30, Rakesh Kudurumalla:
> ping
> 
> > -----Original Message-----
> > From: Rakesh Kudurumalla
> > Sent: Monday, January 10, 2022 2:35 PM
> > To: Thomas Monjalon <thomas@monjalon.net>; Jerin Jacob Kollanukkaran
> > <jerinj@marvell.com>
> > Cc: stable@dpdk.org; dev@dpdk.org; david.marchand@redhat.com;
> > ferruh.yigit@intel.com; andrew.rybchenko@oktetlabs.ru;
> > ajit.khaparde@broadcom.com
> > Subject: RE: [EXT] Re: [dpdk-stable] [PATCH v2] test: avoid hang if queues are
> > full and Tx fails
> > 
> > ping
> > 
> > > -----Original Message-----
> > > From: Rakesh Kudurumalla
> > > Sent: Monday, December 13, 2021 12:10 PM
> > > To: Thomas Monjalon <thomas@monjalon.net>; Jerin Jacob Kollanukkaran
> > > <jerinj@marvell.com>
> > > Cc: stable@dpdk.org; dev@dpdk.org; david.marchand@redhat.com;
> > > ferruh.yigit@intel.com; andrew.rybchenko@oktetlabs.ru;
> > > ajit.khaparde@broadcom.com
> > > Subject: RE: [EXT] Re: [dpdk-stable] [PATCH v2] test: avoid hang if
> > > queues are full and Tx fails
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Thomas Monjalon <thomas@monjalon.net>
> > > > Sent: Monday, November 29, 2021 2:44 PM
> > > > To: Rakesh Kudurumalla <rkudurumalla@marvell.com>; Jerin Jacob
> > > > Kollanukkaran <jerinj@marvell.com>
> > > > Cc: stable@dpdk.org; dev@dpdk.org; david.marchand@redhat.com;
> > > > ferruh.yigit@intel.com; andrew.rybchenko@oktetlabs.ru;
> > > > ajit.khaparde@broadcom.com
> > > > Subject: Re: [EXT] Re: [dpdk-stable] [PATCH v2] test: avoid hang if
> > > > queues are full and Tx fails
> > > >
> > > > 29/11/2021 09:52, Rakesh Kudurumalla:
> > > > > From: Thomas Monjalon <thomas@monjalon.net>
> > > > > > 22/11/2021 08:59, Rakesh Kudurumalla:
> > > > > > > From: Thomas Monjalon <thomas@monjalon.net>
> > > > > > > > 20/07/2021 18:50, Rakesh Kudurumalla:
> > > > > > > > > Current pmd_perf_autotest() in continuous mode tries to
> > > > > > > > > enqueue MAX_TRAFFIC_BURST completely before starting the
> > test.
> > > > > > > > > Some drivers cannot accept complete MAX_TRAFFIC_BURST even
> > > > > > > > > though
> > > > > > rx+tx
> > > > > > > > > desc
> > > > > > > > count
> > > > > > > > > can fit it.
> > > > > > > >
> > > > > > > > Which driver is failing to do so?
> > > > > > > > Why it cannot enqueue 32 packets?
> > > > > > >
> > > > > > > Octeontx2 driver is failing to enqueue because hardware
> > > > > > > buffers are full
> > > > > > before test.
> > > >
> > > > Aren't you stopping the support of octeontx2?
> > > > Why do you care now?
> > > >  yes we are not supporting octeontx2,but this  issue is observed in
> > > > cnxk driver ,current patch fixes the same
> > > > > >
> > > > > > Why hardware buffers are full?
> > > > > Hardware buffers are full because number of number of descriptors
> > > > > in continuous mode Is less than MAX_TRAFFIC_BURST, so if enque
> > > > > fails , there is no way hardware can drop the Packets .
> > > > > pmd_per_autotest application evaluates performance after enqueueing
> > packets Initially.
> > > > > >
> > > > > > > pmd_perf_autotest() in continuous mode tries to enqueue
> > > > > > > MAX_TRAFFIC_BURST (2048) before starting the test.
> > > > > > >
> > > > > > > > > This patch changes behaviour to stop enqueuing after few
> > retries.
> > > > > > > >
> > > > > > > > If there is a real limitation, there will be issues in more
> > > > > > > > places than this test program.
> > > > > > > > I feel it should be addressed either in the driver or at ethdev level.
> > > > > > > >
> > > > > > > > [...]
> > > > > > > > > @@ -480,10 +483,19 @@ main_loop(__rte_unused void *args)
> > > > > > > > >  			nb_tx = RTE_MIN(MAX_PKT_BURST, num);
> > > > > > > > >  			nb_tx = rte_eth_tx_burst(portid, 0,
> > > > > > > > >  						&tx_burst[idx],
> > > > nb_tx);
> > > > > > > > > +			if (nb_tx == 0)
> > > > > > > > > +				retry_cnt++;
> > > > > > > > >  			num -= nb_tx;
> > > > > > > > >  			idx += nb_tx;
> > > > > > > > > +			if (retry_cnt == MAX_RETRY_COUNT) {
> > > > > > > > > +				retry_cnt = 0;
> > > > > > > > > +				break;
> > > > > > > > > +			}
> > > >
> > > >
> 
> 






  reply	other threads:[~2022-02-01  7:44 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20 12:47 [dpdk-stable] [PATCH] " Rakesh Kudurumalla
2021-07-20 16:50 ` [dpdk-stable] [PATCH v2] " Rakesh Kudurumalla
2021-10-19 10:19   ` Rakesh Kudurumalla
2021-10-29  7:18     ` Rakesh Kudurumalla
2021-11-12 11:32   ` Thomas Monjalon
2021-11-22  7:59     ` [EXT] " Rakesh Kudurumalla
2021-11-22  8:58       ` Thomas Monjalon
2021-11-29  8:52         ` Rakesh Kudurumalla
2021-11-29  9:13           ` Thomas Monjalon
2021-12-13  6:40             ` Rakesh Kudurumalla
2022-01-10  9:04               ` Rakesh Kudurumalla
2022-02-01  6:30                 ` Rakesh Kudurumalla
2022-02-01  7:44                   ` Thomas Monjalon [this message]
2022-02-14  4:56                     ` Rakesh Kudurumalla
2022-05-09 10:01                       ` Rakesh Kudurumalla
2022-05-24  5:39                         ` Rakesh Kudurumalla
2022-05-25  8:02                           ` Thomas Monjalon

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