From: Bruce Richardson <bruce.richardson@intel.com>
To: Paul Emmerich <emmericp@net.in.tum.de>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Performance regression in DPDK 1.8/2.0
Date: Tue, 28 Apr 2015 11:58:14 +0100 [thread overview]
Message-ID: <20150428105814.GB7484@bricha3-MOBL3> (raw)
In-Reply-To: <23D2CA18-1875-4182-8DEE-9F6393011D2C@net.in.tum.de>
On Tue, Apr 28, 2015 at 12:28:34AM +0200, Paul Emmerich wrote:
> Let me know if you need any additional information.
> I'd also be interested in the configuration that resulted in the 20% speed-
> up that was mentioned in the original mbuf patch
>
> Paul
>
The speed-up would be for apps that were doing RX of scattered packets, i.e.
across mbufs. Before 1.8, this was using a scalar function which was rather
slow compared to the fast-path vector function. In 1.8 we introduced a new
vector function which supported scattered packets - it still isn't as fast as
the non-scattered packet RX function, but it was a good improvement over the
older version.
/Bruce
next prev parent reply other threads:[~2015-04-28 10:58 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-26 18:50 Paul Emmerich
2015-04-27 8:06 ` Pavel Odintsov
2015-04-27 17:38 ` De Lara Guarch, Pablo
2015-04-27 22:28 ` Paul Emmerich
2015-04-28 5:50 ` Matthew Hall
2015-04-28 10:56 ` Paul Emmerich
2015-04-28 10:43 ` Paul Emmerich
2015-04-28 10:55 ` Bruce Richardson
2015-04-28 11:32 ` De Lara Guarch, Pablo
2015-04-28 10:58 ` Bruce Richardson [this message]
2015-04-28 11:31 ` De Lara Guarch, Pablo
2015-04-28 11:48 ` Paul Emmerich
2015-05-05 14:56 ` De Lara Guarch, Pablo
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