From: Eric Dumazet <eric.dumazet@gmail.com>
To: juice@swagman.org
Cc: "Loke, Chetan" <Chetan.Loke@netscout.com>,
Jon Zhou <jon.zhou@jdsu.com>,
Stephen Hemminger <shemminger@vyatta.com>,
netdev@vger.kernel.org
Subject: RE: Using ethernet device as efficient small packet generator
Date: Fri, 21 Jan 2011 12:51:49 +0100 [thread overview]
Message-ID: <1295610709.2601.35.camel@edumazet-laptop> (raw)
In-Reply-To: <13dbf221c875a931d408784495884998.squirrel@www.liukuma.net>
Le vendredi 21 janvier 2011 à 13:44 +0200, juice a écrit :
> Hi again.
>
> It has been a while since last time I got to be able to test this
> again, as there have been some other matters at hand.
> However, now I managed to rerun my tests in several different kernels.
>
> I am using now a PCIe Intel e1000e card, that should be able to handle
> the needed traffic amount.
>
> The statistics that I get are as follows:
>
> kernel 2.6.32-27 (ubuntu 10.10 default)
> pktgen: 750064pps 360Mb/sec (360030720bps)
> AX4000 analyser: Total bitrate: 383.879 MBits/s
> Bandwidth: 38.39% GE
> Average packet intereval: 1.33 us
>
> kernel 2.6.37 (latest stable from kernel.org)
> pktgen: 786848pps 377Mb/sec (377687040bps)
> AX4000 analyser: Total bitrate: 402.904 MBits/s
> Bandwidth: 40.29% GE
> Average packet intereval: 1.27 us
>
> kernel 2.6.38-rc1 (latest from kernel.org)
> pktgen: 795297pps 381Mb/sec (381742560bps)
> AX4000 analyser: Total bitrate: 407.117 MBits/s
> Bandwidth: 40.72% GE
> Average packet intereval: 1.26 us
>
>
...
> pktgen:
>
> Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60
> frags: 0 delay: 0 clone_skb: 1 ifname: eth1
> flows: 0 flowlen: 0
> queue_map_min: 0 queue_map_max: 0
> dst_min: 10.10.11.2 dst_max:
> src_min: src_max:
> src_mac: 00:1b:21:7c:e5:b1 dst_mac: 00:04:23:08:91:dc
> udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9
> src_mac_count: 0 dst_mac_count: 0
> Flags:
> Current:
> pkts-sofar: 10000000 errors: 0
> started: 77203892067us stopped: 77216465982us idle: 1325us
> seq_num: 10000001 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
> cur_saddr: 0x0 cur_daddr: 0x20b0a0a
> cur_udp_dst: 9 cur_udp_src: 9
> cur_queue_map: 0
> flows: 0
> Result: OK: 12573914(c12572589+d1325) nsec, 10000000 (60byte,0frags)
> 795297pps 381Mb/sec (381742560bps) errors: 0
>
>
> AX4000 analyser:
>
> Total bitrate: 407.117 MBits/s
> Bandwidth: 40.72% GE
> Average packet intereval: 1.26 us
>
>
You should try
CLONE_SKB="clone_skb 10"
...
pgset "$CLONE_SKB"
Because I suspect you hit a performance problem on skb
allocation/filling/use/freeing
You can use perf tool to get some performance profile while your pktgen
session is running
# cd tools/perf
# make
...
# ./perf top
next prev parent reply other threads:[~2011-01-21 11:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-30 1:11 Using ethernet device as efficient small packet generator Loke, Chetan
2011-01-21 11:44 ` juice
2011-01-21 11:51 ` Eric Dumazet [this message]
2011-01-21 12:12 ` juice
2011-01-21 13:38 ` Ben Greear
2011-01-21 22:09 ` Brandeburg, Jesse
2011-01-23 21:48 ` juice
2011-01-24 8:10 ` juice
2011-01-24 9:18 ` Eric Dumazet
2011-01-24 16:34 ` Eric Dumazet
2011-01-24 20:51 ` juice
2011-02-02 8:13 ` juice
-- strict thread matches above, loose matches on Subject: below --
2010-12-23 5:15 juice
2010-12-23 8:57 ` Jon Zhou
2010-12-23 10:50 ` juice
2010-12-22 7:30 juice
2010-12-22 8:08 ` Eric Dumazet
2010-12-22 11:11 ` juice
2010-12-22 11:28 ` Eric Dumazet
2010-12-22 15:48 ` Jon Zhou
2010-12-22 15:59 ` Eric Dumazet
2010-12-22 16:52 ` Jon Zhou
2010-12-22 17:18 ` Eric Dumazet
2010-12-22 17:40 ` Jon Zhou
2010-12-22 17:51 ` Eric Dumazet
2010-12-22 17:15 ` Jon Zhou
2010-12-21 9:56 juice
2010-12-21 18:22 ` Stephen Hemminger
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