Date: Fri, 23 Dec 2005 10:32:15 +0100 From: Andre Oppermann <andre@freebsd.org> To: ShouYan Mao <symao@juniper.net> Cc: freebsd-net@freebsd.org, freebsd-current@freebsd.org Subject: Re: Network performance measurements of -current Message-ID: <43ABC41F.15C083AE@freebsd.org> References: <6834BE1811D97C4B8581CE6BD14506800545C5@lepton.jnpr.net>
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ShouYan Mao wrote:
>
> So, would you try it with PCI-E Gigabit card?
I would if I had a PCI-E system and suitable PCI-E Gigabit cards.
Feel free to send me a test system.
--
Andre
> Best Regards.
> Shouyan
>
> -------------------------------------------------------
> I'm not the best, but I try to do better.
> -------------------------------------------------------
>
> -----Original Message-----
> From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] On Behalf Of Andre Oppermann
> Sent: 2005Äê12ÔÂ23ÈÕ 2:17
> To: freebsd-current@freebsd.org
> Cc: freebsd-net@freebsd.org
> Subject: Network performance measurements of -current
>
> As part my funded TCP/IP optimization work I'm doing lots of measurements
> and profiling with an Agilent N2X network tester and calibrated traffic
> generator.
>
> The following data shall serve as baseline of the current performance we
> get out of FreeBSD 7-current. More to come tomorrow though.
>
> OS: FreeBSD 7-current as of 20051222-1600 UTC
> KERNEL: Generic kernel, minus WITNESS and INVARIANTS, plus HWPMC, HZ=1000
> HARDWARE: Dual Opteron 852 2.6Ghz, Tyan S2882 Mobo with AMD-8131 PCI-X tunnel
> HARDWARE: dual Broadcom Gigabit BMC5704C PCI-X-133 ("bge")
> HARDWARE: dual Intel Gigabit 82546EB PCI-X-133 ("em")
>
> Uniprocessor kernel
>
> bge:
> normal forwarding bge0->bge1: @64/326kpps/166us/402kpps(30%Loss)/194us
> normal forwarding bge0->bge1: @1500/81kpps/520us
> normal forwarding bge0->disc0: @64/1205kpps
> IP fastforwarding bge0->bge1: @64/565kpps/192us/575kpps(60%Loss)/1090us
> IP fastforwarding bge0->bge1: @1500/81kpps/730us
> IP fastforwarding bge0->disc0: @64/1160kpps
> net.isr.direct=1 bge0->bge1: @64/476kpps/211us/487kpps(68%Loss)/1284us
> net.isr.direct=1 bge0->bge1: @1500/81kpps/760us
> net.isr.direct=1 bge0->disc0: @64/1250kpps
> polling (*) bge0->bge1:
> @64/420kpps(9%Loss)/1385us/416kpps(72%Loss)/1600us
> polling (*) bge0->bge1: @1500/71kpps(9%Loss)/850us
> polling (*) bge0->disc0: @64/697kpps
>
> Comments: Under full load the normal processing breaks completely down
> while with IP fastforwarding it levels off but continues to forward.
> Strangely with polling it has 9% loss at all loads (even at 1% wirespeed).
> May be related to HZ=1000.
>
> em:
> normal forwarding em0->em1: @64/372kpps/112us/396kpps(11%Loss)/131us
> normal forwarding em0->em1: @1500/81kpps/170us
> normal forwarding em0->disc0: @64/1130kpps
> IP fastforwarding em0->em1: @64/565kpps/45us/585kpps(4%Loss)/1600us
> IP fastforwarding em0->em1: @1500/81kpps/135us
> IP fastforwarding em0->disc0: @64/1116kpps
> net.isr.direct=1 em0->em1: later
> net.isr.direct=1 em0->disc0: later
> polling (*) em0->em1: later
> polling (*) em0->disc0: later
>
> (*) max_burst=1000, user_frac=0, each_burst=30
>
> Sponsored by: TCP/IP Optimization Fundraise 2005
>
> --
> Andre
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