Hey Rahul, The kernel version should not make a difference,
I'm curious, since ovs-2.3.0 is multithreaded, not sure how do you measure the cpu usage to be 100%? Also, could you post the full `mpstat -P ALL` output, so we can see the distribution of cpu usage, Thanks, Alex Wang, On Tue, Dec 9, 2014 at 1:49 AM, Rahul Arora <rahul1991.ar...@gmail.com> wrote: > Hi Alex, > > Thanks for your help. > > I am using the following command to test CPU usage. > > mpstat -P ALL 1 > > I was using 3.12 kernel version and you are using 3.13.0-30-generic > version.Please let me know if this can be the issue?? > > > > On Sat, Dec 6, 2014 at 5:04 AM, Alex Wang <al...@nicira.com> wrote: > >> Hey Rahul, >> >> Could you help confirm the following: >> >> 1. did you use vm or bare metal machine for testing? >> >> 2. how do you measure the cpu utilization of ovs and kernel bridge? >> >> >> We ran some throughput tests, and we observed constant better >> performance over the Linux bridge. >> >> Below is a set of our own throughput test result using ovs branch-2.3. >> >> Plateform: >> Server Dell R620, running Ubuntu 14.04 (3.13.0-30-generic), NIC is Intel >> X540. >> >> Flow: >> Single flow, "in_port=1,actions:output=2" >> >> Traffic type: >> - unidirectional TCP throughput using Spirent (1 flow and 128 flows). >> >> >> *Throughput view (unit: Gbit/s):* >> >> Linux Bridge, >> Frame Size1 flow128 flow780.6021.5121280.9812.1892561.8155.4335123.252 >> 5.29910246.65810.015149.6849.98790009.92110.0 >> >> OVS Branch-2.3: >> Frame Size1 flow128 flow780.78.2581281.09810.02561.89810.05123.69410.0 >> 10247.1910.015149.8849.98790009.89910.0 >> >> >> >> *Frame Per Second view (unit: Frames/s):* >> >> Linux Bridge, >> Frame Size1 flow128 flow78768057192901212882891218491122568220702460630 >> 51276405812450201024797193119731815147891418138029000137491138581 >> >> OVS Branch-2.3: >> Frame Size1 flow128 flow788928571053370712892729984459462568593864528985 >> 51286805523496241024860881119731815148054128138029000137181138581 >> >> >> Thanks, >> Alex Wang, >> >> On Wed, Nov 26, 2014 at 10:35 PM, Rahul Arora <rahul1991.ar...@gmail.com> >> wrote: >> >>> Hi Team, >>> >>> We are doing comparison of throughput and CPU consumption between OVS >>> 2.3.0 and kernel bridge with different packet size. >>> >>> We are observing huge difference in performance. With frame size 64 and >>> 128 bytes unidirectional traffic from port1 to port2 below are the numbers. >>> >>> >>> *OVS 2.3.0 (Dual core with matching flow in kernel space, kernel 3.12)* >>> >>> * kernel bridge(Dual Core System, kernel 3.12) * *FRAME SIZE* *Throughput >>> unidirectional (Mbps)* *CPU Usage %* *VS* *FRAME SIZE* *Throughput >>> (Mbps)* *CPU Usage %* 64 375 100 64 487 100 128 747 100 128 864 40 >>> 256 927 10 256 927 5 320 941 8 320 941 4 384 950 6 384 950 4 448 957 >>> 4 448 957 3 512 962 3 512 962 3 1024 980 1 1024 980 1 1500 986 1 1500 >>> 986 1 >>> We have matching flow in kernel space with in_port=1 and action=output:2 >>> and flow is matching in kernel space >>> >>> How we can improve the performance of OVS i.e. increasing the throughput >>> and decrease CPU consumption with lower frame size. >>> >>> _______________________________________________ >>> discuss mailing list >>> discuss@openvswitch.org >>> http://openvswitch.org/mailman/listinfo/discuss >>> >>> >> >
_______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
