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