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" <[EMAIL PROTECTED]>
To: "OxY" <[EMAIL PROTECTED]>
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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