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From: David Marchand <david.marchand@redhat.com>
To: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>,
	David Hunt <david.hunt@intel.com>,
	 Bruce Richardson <bruce.richardson@intel.com>
Cc: dev <dev@dpdk.org>, dpdk stable <stable@dpdk.org>,
	 "Ruifeng Wang (Arm Technology China)" <ruifeng.wang@arm.com>,
	ci@dpdk.org
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v1 1/1] test/distributor: prevent return buffer overload
Date: Fri, 29 Jan 2021 09:03:49 +0100
Message-ID: <CAJFAV8wJvMZCMqjrb2VPnZgw6A_6sYpeRERLjF+8ZJ+9LqMWsQ@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8ws=mCTFF6hQQ8kUFRxuR8QYGzB7ubMFRBDCiU=JmEnZQ@mail.gmail.com>

On Thu, Jan 28, 2021 at 3:10 PM David Marchand
<david.marchand@redhat.com> wrote:
>
> On Tue, Jan 19, 2021 at 4:59 AM Lukasz Wojciechowski
> <l.wojciechow@partner.samsung.com> wrote:
> >
> > The distributor library implementation uses a cyclic queue to store
> > packets returned from workers. These packets can be later collected
> > with rte_distributor_returned_pkts() call.
> > However the queue has limited capacity. It is able to contain only
> > 127 packets (RTE_DISTRIB_RETURNS_MASK).
> >
> > Big burst tests sent 1024 packets in 32 packets bursts without waiting
> > until they are processed by the distributor. In case when tests were
> > run with big number of worker threads, it happened that more than
> > 127 packets were returned from workers and put into cyclic queue.
> > This caused packets to be dropped by the queue, making them impossible
> > to be collected later with rte_distributor_returned_pkts() calls.
> > However the test waited for all packets to be returned infinitely.
> >
> > This patch fixes the big burst test by not allowing more than
> > queue capacity packets to be processed at the same time, making
> > impossible to drop any packets.
> > It also cleans up duplicated code in the same test.
> >
> > Bugzilla ID: 612
> > Fixes: c0de0eb82e40 ("distributor: switch over to new API")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>
> Tested-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: David Hunt <david.hunt@intel.com>

Applied, thanks Lukasz.

This should fix the issue seen at UNH on the ARM server.

-- 
David Marchand


  reply	other threads:[~2021-01-29  8:04 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20210119035920eucas1p15da5a04b73d19e63287dc14905d765f2@eucas1p1.samsung.com>
2021-01-19  3:59 ` [dpdk-dev] [PATCH v1 0/1] distributor test fix Lukasz Wojciechowski
     [not found]   ` <CGME20210119035921eucas1p1aaea0d68975ba9481f200912eb10a40e@eucas1p1.samsung.com>
2021-01-19  3:59     ` [dpdk-dev] [PATCH v1 1/1] test/distributor: prevent return buffer overload Lukasz Wojciechowski
2021-01-28 14:10       ` [dpdk-dev] [dpdk-stable] " David Marchand
2021-01-29  8:03         ` David Marchand [this message]
2021-01-29 12:36           ` Lukasz Wojciechowski
2021-01-28 16:46       ` [dpdk-dev] " David Hunt
2021-01-19  8:44   ` [dpdk-dev] [PATCH v1 0/1] distributor test fix David Marchand
2021-01-19 13:06     ` Lukasz Wojciechowski
2021-01-28 13:34       ` David Marchand

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