[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Perf regression of netperf compared Xen 4.4 to origin/master
The test is pretty silly. I've 14 guests, and I make each guest run netperf against the other. I start with 1 pair, then 2 pairs, then up to 7. Each guest is 768 MB, runs in a RAMdisk and just has one vif. The box is a SuperMicro X8DB8+ with two E5520 and 12GB of RAM. The netperf runs for a minute. The guests are PVHVM and I am using qemu-upstream. The guest configs are: builder='hvm' disk = [ 'file:/mnt/lab/bootstrap-x86_64/root_image.iso,hdc:cdrom,r'] memory=768 boot='d' vcpus=1 serial='file:/var/log/xen/console-g-vm0.log' vnclisten='0.0.0.0' name='g-vm0' on_crash='preserve' # IP is 192.168.102.90 vif = [ 'mac=00:0f:4b:01:01:00, bridge=switch' ] .. and naturally the ip, name and MAC change for each guest. The kernel for both the guest and domain 0 is the same - no configuration change. The Xen is built without debug=y. When doing this test under Xen 4.4: 0, 8823.14, 8823.14, 8823.14, 8823.14 1, 9645.67, 4822.84, 4085.88, 5559.79 2, 11725.3, 3908.44, 2652.09, 4698.15 3, 12199.3, 3049.83, 1473.95, 3631.93 4, 12223.2, 2444.64, 1023.48, 2887.83 5, 11733.4, 1955.57, 909.66, 3057.11 6, 11927.7, 1703.95, 1187.29, 1933.76 7, 11623.8, 1452.97, 538.11, 2228.21 And when doing it under 'master' branch: 0, 8478.57, 8478.57, 8478.57, 8478.57 1, 7663.38, 3831.69, 3427.70, 4235.68 2, 8381.77, 2793.92, 1977.75, 3242.46 3, 8165.55, 2041.39, 1373.43, 2294.48 4, 7742.64, 1548.53, 763.08, 2065.43 5, 7691.87, 1281.98, 626.85, 1784.72 6, 8337.06, 1191.01, 626.98, 1847.55 7, 8074.8, 1009.35, 384.84, 1380.00 I am going to start a bit of git bisection to figure this out but if somebody has some ideas on where/when to concentrate I would appreciate the help. Attachment:
network.png _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |