vr speed issues

Charles Sprickman spork at bway.net
Wed Nov 29 15:43:40 PST 2006

On Wed, 29 Nov 2006, Philipp Ost wrote:

> Charles Sprickman wrote:
> [snipped]
>> Performace with scp was around 200KB/s, ftp wavered between 300-500KB/s. 
>> This did not appear to be a duplex mismatch - unmanaged switch showed them 
>> all at 100/Full, put some other hosts on the same ports/cabling and got 
>> near wire speed. 
> I just checked with the boxes I have here. One is an Athon XP on a Asus board 
> with a VIA Rhine II on board; the other is a `old' Celeron 500 on a MSI board 
> with a Intel ``Pro 100/S Desktop Adapter''.
> I transfered a 538MiB file (some old CURRENT snapshot) via sftp. My result: 
> from box one to box two (vr to fxp) I get 2.3MB/s; from box two to box one 
> (fxp to vr) I get 3.1MB/s.

I also did a little more digging and noticed that once I start pinging 
from one of these hosts using large packet sizes, I get about 50-60% 
packet loss (ie: ping -s 1500 other.vr0.host).  If I ping something with a 
decent card, I get about 30-50% packet loss.  There's no packet loss with 
the default packet size.

Anyone else with some vr cards feel like checking this out?



> The first box is running 6.2-PRERELEASE from 11/18, the Intel box is running 
> 7.0-CURRENT from 11/24.
> Output of
> $ dmesg | grep vr
> vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0x8000-0x80ff mem 
> 0xd6000000-0xd60000ff at device 18.0 on pci0
> miibus0: <MII bus> on vr0
> and
> $ dmesg | grep fxp
> fxp0: <Intel 82550 Pro/100 Ethernet> port 0xc000-0xc03f mem 
> 0xdd020000-0xdd020fff,0xdd000000-0xdd01ffff irq 11 at device 1.0 on pci1
> miibus0: <MII bus> on fxp0
> [...]
> fxp0: Microcode loaded, int_delay: 1000 usec  bundle_max: 6
> fxp0: Microcode loaded, int_delay: 1000 usec  bundle_max: 6
> If needed I can provide a full dmesg of both boxes.
> HTH,
> Philipp
> -- 
> www.familie-ost.info/~pj

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