Re: [Xen-users] strangeness with high BDP tests

[Nivedita Singhvi <niv@xxxxxxxxxx>]

> I don't trust the 10 second tests either, especially for such a high
> RTT. Thats why I ran the tests for 80 seconds (thats 1000 RTTs, and
> should give TCP enough time to stabilize). I'll get some numbers using
> these options in any case.
Cool :). Thanks for offering to test, too.

> Yeah, but in my experience it usually picks up the "default" value as
> set by the sysctl. I'll check the code.
In your netperf output, it's listing the socket size as
the default system 64K. If you invoke netperf with -s 131762 -S 131762
it should at least use 128K (local and remote). Bumping that
up by 3 times usually gives good gain on netperf stream type
tests bymmv..

> I agree. But I think its a reasonable goal to expect dom0 performance
> to match a VM performance across a variety of environments :)
Yep ;)

thanks,
Nivedita



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