[Xen-users] xennet windows pv performance

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

I've just pushed some changes to hg that seem to speed things up a bit
for me.

On one machine with 2 x dual core 2.4Ghz AMD cpu's, testing with iperf
from DomU to Dom0 I get:
Windows (vcpus = 2) - ~500MBits/sec - ~66% cpu utilization (eg 100% on
one, and 33% on the second cpu)
Linux (vcpus = 1) - ~2200MBits/sec

On another machine with 1 x dual core 1.8Ghz AMD cpu, testing as above I
get:
Windows (vcpus = 2) - ~65MBits/sec - ~100% cpu utilization (eg 100% on
both cpu's)
Linux - can't test as I don't have any Linux DomU's set up presently.

I don't think there is enough difference in raw CPU power to account for
the 7x performance difference between the two physical machines... it
must be something else.

Anyway, on the second machine my performance is up from about
40MBits/sec so I think I'm making progress.

James


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