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From: Olivier Matz <olivier.matz@6wind.com>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Cc: dev@dpdk.org
Subject: Re: [PATCH v2] mbuf: reduce pktmbuf init cycles
Date: Fri, 30 Jun 2017 14:27:51 +0200	[thread overview]
Message-ID: <20170630142751.148b6c1a@platinum> (raw)
In-Reply-To: <20170627115751.4722-1-jerin.jacob@caviumnetworks.com>

On Tue, 27 Jun 2017 17:27:51 +0530, Jerin Jacob <jerin.jacob@caviumnetworks.com> wrote:
> There is no need for initializing the complete
> packet buffer with zero as the packet data area will be
> overwritten by the NIC Rx HW anyway.
> 
> The testpmd configures the packet mempool
> with around 180k buffers with
> 2176B size. In existing scheme, the init routine
> needs to memset around ~370MB vs the proposed scheme
> requires only around ~22MB on 128B cache aligned system.
> 
> Useful in running DPDK in HW simulators/emulators,
> where millions of cycles have an impact on boot time.
> 
> Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

Acked-by: Olivier Matz <olivier.matz@6wind.com>

  reply	other threads:[~2017-06-30 12:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-05 16:38 [PATCH] mbuf: reduce pktmbuf init cycles Jerin Jacob
2017-06-23  9:42 ` Olivier Matz
2017-06-23 10:06   ` Jerin Jacob
2017-06-27 11:57 ` [PATCH v2] " Jerin Jacob
2017-06-30 12:27   ` Olivier Matz [this message]
2017-07-01 10:15     ` Thomas Monjalon

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