From: Olivier Matz <olivier.matz@6wind.com>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [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>
next prev parent 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 [dpdk-dev] [PATCH] " Jerin Jacob
2017-06-23 9:42 ` Olivier Matz
2017-06-23 10:06 ` Jerin Jacob
2017-06-27 11:57 ` [dpdk-dev] [PATCH v2] " Jerin Jacob
2017-06-30 12:27 ` Olivier Matz [this message]
2017-07-01 10:15 ` Thomas Monjalon
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