On 07/02/2009 08:48 AM, Avi Kivity wrote:
HOST time (make -j12&& make -j12 modules) with no guest running
----------------------------------------------------------------
real 6m50.936s
user 29m12.051s
sys 5m50.867s
35 minutes cpu run on 7 minutes real time, so scaling 1:7. User time
almost the same, system time different but not enough to account for
the large difference in run time.
I'm due to get my own Nehalem next week, I'll try to reproduce your
results here.
I reproduced this on a 2x4 barcelona, I get 6.6x scaling on the guest
compared to your 7.2x on the host. This is with a kvm.git host kernel.
Once thing that changed is an improvement in cfq with multiple threads;
try setting the host io scheduler for /dev/sdb to deadline (together
with dropping -usbdevice tablet).
--
error compiling committee.c: too many arguments to function
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
