From: Jesper Dangaard Brouer <brouer@redhat•com>
To: Daniel Borkmann <dborkman@redhat•com>
Cc: brouer@redhat•com, davem@davemloft•net, netdev@vger•kernel.org
Subject: Re: [RFC PATCH net-next 3/3] packet: make use of deferred TX queue flushing
Date: Mon, 25 Aug 2014 15:54:02 +0200 [thread overview]
Message-ID: <20140825155402.2f2a03d7@redhat.com> (raw)
In-Reply-To: <1408887738-7661-4-git-send-email-dborkman@redhat.com>
On Sun, 24 Aug 2014 15:42:18 +0200
Daniel Borkmann <dborkman@redhat•com> wrote:
> This adds a first use-case of deferred tail pointer flushing
> for AF_PACKET's TX_RING in QDISC_BYPASS mode.
Testing with trafgen. I've updated patch 1/3 to NOT call mmiowb(),
during this testing, see why in my other post.
trafgen cmdline:
trafgen --cpp --dev eth5 --conf udp_example01.trafgen -V --cpus 1
* Only use 1 CPU
* default is mmap
* default is QDISC_BYPASS mode
BASELINE(no-patches): trafgen QDISC_BYPASS and mmap:
- tx:1562539 pps
With PACKET_FLUSH_THRESH=8, and QDISC_BYPASS and mmap:
- tx:1683746 pps
Improvement:
+ 121207 pps
- 46 ns (1/1562539*10^9)-(1/1683746*10^9)
This is a significant improvement! :-)
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
Setup details:
--------------
Network overload testing setup according to:
http://netoptimizer.blogspot.dk/2014/04/basic-tuning-for-network-overload.html
Trafgen input file:
https://github.com/netoptimizer/network-testing/blob/master/trafgen/udp_example01.trafgen
Driver/NIC: ixgbe
CPU: E5-2695v2(ES)
next prev parent reply other threads:[~2014-08-25 13:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-24 13:42 [RFC PATCH net-next 0/3] Some deferred TX queue follow-ups Daniel Borkmann
2014-08-24 13:42 ` [RFC PATCH net-next 1/3] ixgbe: support netdev_ops->ndo_xmit_flush() Daniel Borkmann
2014-08-25 5:55 ` David Miller
2014-08-25 12:07 ` Jesper Dangaard Brouer
2014-08-25 22:32 ` David Miller
2014-08-25 23:31 ` David Miller
2014-08-26 6:13 ` Daniel Borkmann
2014-08-25 22:51 ` Alexander Duyck
2014-08-26 6:44 ` Jesper Dangaard Brouer
2014-08-27 11:34 ` Jesper Dangaard Brouer
2014-08-24 13:42 ` [RFC PATCH net-next 2/3] net: add __netdev_xmit_{only,flush} helpers Daniel Borkmann
2014-08-24 13:42 ` [RFC PATCH net-next 3/3] packet: make use of deferred TX queue flushing Daniel Borkmann
2014-08-25 5:57 ` David Miller
2014-08-25 6:40 ` Daniel Borkmann
2014-08-25 13:54 ` Jesper Dangaard Brouer [this message]
2014-08-25 15:16 ` Jesper Dangaard Brouer
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