From: Thomas Monjalon <thomas@monjalon.net>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Cc: dev@dpdk.org, Hemant Agrawal <hemant.agrawal@nxp.com>,
john.mcnamara@intel.com
Subject: Re: [dpdk-dev] [PATCH v3 ] ethdev: introduce lock-free txq capability flag
Date: Tue, 18 Jul 2017 16:43:55 +0300 [thread overview]
Message-ID: <13765612.oLuGorxqyg@xps> (raw)
In-Reply-To: <ff0cb451-8a6b-efb2-bd60-07fb9c2224ca@nxp.com>
13/07/2017 15:02, Hemant Agrawal:
> On 7/10/2017 10:29 PM, Jerin Jacob wrote:
> > Introducing the DEV_TX_OFFLOAD_MT_LOCKFREE TX capability flag.
> > if a PMD advertises DEV_TX_OFFLOAD_MT_LOCKFREE capable, multiple threads
> > can invoke rte_eth_tx_burst() concurrently on the same tx queue without
> > SW lock. This PMD feature will be useful in the following use cases and
> > found in the OCTEON family of NPUs.
> >
> > 1) Remove explicit spinlock in some applications where lcores
> > to TX queues are not mapped 1:1.
> > example: OVS has such instance
> > https://github.com/openvswitch/ovs/blob/master/lib/netdev-dpdk.c#L299
> > https://github.com/openvswitch/ovs/blob/master/lib/netdev-dpdk.c#L1859
> > See the the usage of tx_lock spinlock.
> >
> > 2) In the eventdev use case, avoid dedicating a separate TX core for
> > transmitting and thus enables more scaling as all workers can
> > send the packets.
> >
> > Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
>
> You may also like to add this capability in "doc/guides/nics/features/*.ini"
I've just added the feature "Lock-free Tx queue" in features/default.ini.
> Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Applied, thanks
next prev parent reply other threads:[~2017-07-18 13:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-21 12:22 [dpdk-dev] [PATCH] ethdev: add lock-less " Jerin Jacob
2017-04-24 12:34 ` Thomas Monjalon
2017-04-27 11:00 ` Jerin Jacob
2017-07-05 17:46 ` Thomas Monjalon
2017-07-06 6:00 ` Jerin Jacob
2017-07-06 6:21 ` [dpdk-dev] [PATCH v2] ethdev: introduce lock-free " Jerin Jacob
2017-07-08 16:08 ` Thomas Monjalon
2017-07-10 16:56 ` Jerin Jacob
2017-07-10 16:59 ` [dpdk-dev] [PATCH v3 ] " Jerin Jacob
2017-07-13 12:02 ` Hemant Agrawal
2017-07-18 13:43 ` Thomas Monjalon [this message]
2017-07-13 18:42 ` santosh
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