On Mar 28, 2013, at 7:27 AM, Gabriele Bulfon <[email protected]> wrote:
> Great and satisfying answer Garret, thanks so much.
> The original main network card is a bge.
> The two rge were added to implement the connection to the XStream Storage.
> Do you think that two bge would have been better?
bge got a lot more attention on SPARC, so I would expect them to perform a
little better there. Additionally, the bge hardware is generally more capable,
and if you're using zones or anything like that, it can have a big difference
(particularly different receive rings.)
- Garrett
>
> Gabriele.
>
>
>
>
> Da: Garrett D'Amore <[email protected]>
> A: [email protected]
> Data: 28 marzo 2013 15.19.13 CET
> Oggetto: Re: [discuss] rge driver slower?
>
>
> SunFire sparc systems have lower single CPU performance, and higher overheads
> for DMA setup & teardown. There are probably some extra costs for endian
> swapping descriptor rings as well. (Although it is possible to establish
> mappings that do this in hardware. I'm not sure if rge does this though.
>
> Additionally, the rge driver has never been optimized for use on SPARC.
> Frankly, I don't think anyone ever thought there was much need, I've not
> actually heard before of any body using rge on SPARC in production.
>
> - Garrett
>
> On Mar 28, 2013, at 6:27 AM, Gabriele Bulfon <[email protected]> wrote:
>
>> Hi,
>>
>> I understand this is a Solaris 10 issue, on a native SunFire sparc machine,
>> but maybe someone knows,
>> and it's against an illumos based XStream Storage machine ;)
>>
>> I tested throughput using netio between some VMware XStreamOS and Windows
>> machines, and an
>> illumos based XStream Storage server.
>> Both results in almost 110KB/s.
>>
>> Doing the same on a native SunFires sparc machine using rge devices, having
>> max 80-90KB/s.
>> Any reason?
>>
>> Gabriele.
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