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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>
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH v1 1/1] test/distributor: prevent return buffer overload
Date: Thu, 28 Jan 2021 15:10:08 +0100
Message-ID: <CAJFAV8ws=mCTFF6hQQ8kUFRxuR8QYGzB7ubMFRBDCiU=JmEnZQ@mail.gmail.com> (raw)
In-Reply-To: <20210119035910.8324-2-l.wojciechow@partner.samsung.com>

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
> 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: david.hunt@intel.com
> Cc: stable@dpdk.org
> Signed-off-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>

Pasting from my reply to the cover letter:

> I reproduced the issue with starting a testpmd on the same cores in this system.
> I usually reproduce it after 1-2 minutes of continuously running the
> distributor_autotest unit test.
> I've applied your fix in my tree and I will let this loop run for a while.

This has been running fine for more than 30 minutes on my x86 28 cores system.
Tested-by: David Marchand <david.marchand@redhat.com>

David Marchand

  reply	other threads:[~2021-01-28 14:10 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       ` David Marchand [this message]
2021-01-29  8:03         ` [dpdk-dev] [dpdk-stable] " David Marchand
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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