Re: [ANNOUNCE] Dolphin PCI-SCI RPM Drivers 1.1-4 released

[Jeff V. Merkey]

On Tue, Jan 30, 2001 at 10:07:07AM -0700, Todd wrote:
> folx,
> 
> On Tue, 30 Jan 2001, Jeff V. Merkey wrote:
> > What numbers does G-Enet provide
> > doing userspace -> userspace transfers, and at what processor
> > overhead?
> 
> using stock 2.4 kernel and alteon acenic cards with stock firmware we're
> seeing 993 MBps userspace->userspace (running netperf UDP_STREAM tests,
> which run as userspace client and server) with 88% CPU utilization.
> 
> Using a modified version of the firmware that we wrote we're getting
> 993Mbps with 55% CPU utilization.

I was at 2% utilization running the PCI-SCI tests on a D320 PSB64 adapter.
I doubt you would get good numbers on the box I used with G-Enet -- this 
box is limited to 70 MB/S PCI throughput.  

> 
> > I posted the **ACCURATE** numbers from my test, but I did clarify that I
> > was using a system with a limp PCI bus.
> >
> > Jeff
> 
> i appreciate that.  i'm just trying to figure out why the numbers are so
> low compared to the network speed you mentioned.

Because I used an el-cheapo AMD box.  I provided the info more for a 
2.2.X/2.4.X comparison than anything.  

Jeff

> 
> todd