From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: Juhamatti Kuusisaari <juhamatti.kuusisaari@coriant.com>,
<dev@dpdk.org>,
"Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Subject: Re: [dpdk-dev] [PATCH] lib: change rte_ring dequeue to guarantee ordering before tail update
Date: Sat, 23 Jul 2016 11:35:16 +0530 [thread overview]
Message-ID: <20160723060515.GA13747@localhost.localdomain> (raw)
In-Reply-To: <14017551.U6D1dIIx0P@xps13>
On Thu, Jul 21, 2016 at 11:26:50PM +0200, Thomas Monjalon wrote:
> > > Consumer queue dequeuing must be guaranteed to be done fully before the tail is updated. This is not guaranteed with a read barrier,
> > > changed to a write barrier just before tail update which in practice guarantees correct order of reads and writes.
> > >
> > > Signed-off-by: Juhamatti Kuusisaari <juhamatti.kuusisaari@coriant.com>
> >
> > Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
>
> Applied, thanks
There was ongoing discussion on this
http://dpdk.org/ml/archives/dev/2016-July/044168.html
This change may not be required as it has the performance impact.
next prev parent reply other threads:[~2016-07-23 6:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-15 4:39 Juhamatti Kuusisaari
2016-07-15 12:22 ` Ananyev, Konstantin
2016-07-21 21:26 ` Thomas Monjalon
2016-07-23 6:05 ` Jerin Jacob [this message]
2016-07-23 9:02 ` Thomas Monjalon
2016-07-23 9:36 ` Jerin Jacob
2016-07-23 10:14 ` Ananyev, Konstantin
2016-07-23 10:38 ` Jerin Jacob
2016-07-23 11:15 ` Ananyev, Konstantin
2016-07-23 11:49 ` Jerin Jacob
2016-07-23 12:32 ` Ananyev, Konstantin
2016-07-23 12:35 ` Jerin Jacob
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