Date: Wed, 15 Mar 2006 16:40:24 +0100 From: "OxY" <oxy@field.hu> To: <freebsd-net@freebsd.org> Subject: Re: problem with Marwell gigabit performance Message-ID: <000f01c64846$c7148840$0201a8c0@oxy> References: <001101c64754$cbbd65d0$0201a8c0@oxy> <20060315001806.GA52826@cdnetworks.co.kr>
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with the modified sk(4) driver i got the following:
sk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=2b<RXCSUM,TXCSUM,VLAN_MTU,JUMBO_MTU>
the performance didn't changed, packet drops as usual...
when the system is 100% idle, packet drop is around 1%,
when i got ~0.80 load on the other (fxp0) interface, packet drop is 8-11%
may i change the card to intel or 3com, or what to do?
----- Original Message -----
From: "Pyun YongHyeon" <pyunyh@gmail.com>
To: "OxY" <oxy@field.hu>
Cc: <freebsd-net@freebsd.org>
Sent: Wednesday, March 15, 2006 1:18 AM
Subject: Re: problem with Marwell gigabit performance
> On Tue, Mar 14, 2006 at 11:48:14AM +0100, OxY wrote:
> > hi!
> >
> > i have a Marwell (SMC) gigabit ethernet card (sk0) and
> > have serious problems with performance..
> > the machine is a pc, amd 2000+ xp, 512mb ram.
> >
> > tested with iperf (bidirectional test, udp transfer, not stream)
> > and got 8-15% packet drop when the system was idle.
> >
>
> There is a modified sk(4) driver at
> http://people.freebsd.org/~yongari/sk/sk_test/if_sk.c
> http://people.freebsd.org/~yongari/sk/sk_test/if_skreg.h
>
> Would you please give it try?
> I can't sure but you would get better results as the new driver
> uses one lock for standard MTU size and supports Tx TCP checksum
> offload and Rx IP checksum offload.
> I could push 32bit PCI NIC(DGE-530T) to the PCI bus limit on sparc64.
>
> > then tuned the sysctl with these settings:
> >
> > kern.ipc.maxsockbuf=81920000
> > kern.ipc.nmbclusters=5000000000
> > kern.ipc.somaxconn=8192
> > net.inet.tcp.inflight.enable=1
> > net.inet.raw.recvspace=4096
> > net.inet.tcp.recvspace=131072
> > kern.ipc.shmmax=409600000
> >
> > with these i got around 3-7% packet drop,
> > but it's very high compared to zero :)
> >
> > my question is where/what should i optimize to not
> > have packet drop at all, or at least reduce it as much as
> > possible.
> >
> > thanks for your help!
> >
> > Csaba Banhalmi, HU
> --
> Regards,
> Pyun YongHyeon
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