search for: tcp_crr

...h a Linux bridge between them: Machine A <===> Linux Bridge <===> Machine B I am using netperf to do some performance measuring. I am running two tests. One is the "streaming" test (the default test for netperf) and the other is the "Connect Request/Response" (TCP_CRR) test. When I run the stream test against the top two setups, I get near line speed. I am happy with these numbers. When I run the TCP_CRR test, for the first setup I get around 2200 connections per second, but in the second configuration I are getting around 700-800 connections per second. Why...

...256| 20| +52%| +19% 256| 50| +46%| +32% 256| 100| +44%| +31% - TCP_RR shows improvement of transaction rate. The reason why 1/64 byte does no show much gain is because the test could not fully utilized the two vhost threads: Each vhost thread cosume only about 50% of cpu. TCP_CRR test: size|session|+thu%|+normalize% 1| 1| -8%| -13% 1| 20| +34%| +1% 1| 50| +27%| 0% 1| 100| +29%| +1% 64| 1| -9%| -13% 64| 20| +31%| 0% 64| 50| +26%| -1% 64| 100| +30%| +1% 256| 1| -8%| -11% 256| 20| +33%...

...256| 20| +52%| +19% 256| 50| +46%| +32% 256| 100| +44%| +31% - TCP_RR shows improvement of transaction rate. The reason why 1/64 byte does no show much gain is because the test could not fully utilized the two vhost threads: Each vhost thread cosume only about 50% of cpu. TCP_CRR test: size|session|+thu%|+normalize% 1| 1| -8%| -13% 1| 20| +34%| +1% 1| 50| +27%| 0% 1| 100| +29%| +1% 64| 1| -9%| -13% 64| 20| +31%| 0% 64| 50| +26%| -1% 64| 100| +30%| +1% 256| 1| -8%| -11% 256| 20| +33%...

...== ""-o "$ OUT" == ""]; then echo "netclient <Server IP> <OUTPUT FILE>" exit 1 fi netperf-H $ SERVERIP-i 10,2-I 99,5 --m 4096-s 128K-S 128K> $ OUT netperf-H $ SERVERIP-i 10,2-I 99,5 --m 4096-s 57344-S 57344>> $ OUT netperf-H $ SERVERIP-t TCP_CRR-r 32,1024>> $ OUT Run the test script: [Root @ rhel-PowerEdge-1 ~] # sh / usr / local / sbin / netclient.sh other host or virtual machine ip test results. Log Test results xen real machine wmware xen / machine ratio of real Network throughput 1 (less than the packet buffer) (10 ^ 6bit...

...verage of 3 runs TCP_RR: size/session/+lat%/+normalize% 1/ 1/ 0%/ 0% 1/ 10/ +52%/ +6% 1/ 20/ +27%/ +5% 64/ 1/ 0%/ 0% 64/ 10/ +45%/ +4% 64/ 20/ +28%/ +7% 256/ 1/ -1%/ 0% 256/ 10/ +38%/ +2% 256/ 20/ +27%/ +6% TCP_CRR: size/session/+lat%/+normalize% 1/ 1/ -7%/ -12% 1/ 10/ +34%/ +3% 1/ 20/ +3%/ -8% 64/ 1/ -7%/ -3% 64/ 10/ +32%/ +1% 64/ 20/ +4%/ -7% 256/ 1/ -6%/ -18% 256/ 10/ +33%/ 0% 256/ 20/ +4%/ -8% STREAM: size/session/+th...

...verage of 3 runs TCP_RR: size/session/+lat%/+normalize% 1/ 1/ 0%/ 0% 1/ 10/ +52%/ +6% 1/ 20/ +27%/ +5% 64/ 1/ 0%/ 0% 64/ 10/ +45%/ +4% 64/ 20/ +28%/ +7% 256/ 1/ -1%/ 0% 256/ 10/ +38%/ +2% 256/ 20/ +27%/ +6% TCP_CRR: size/session/+lat%/+normalize% 1/ 1/ -7%/ -12% 1/ 10/ +34%/ +3% 1/ 20/ +3%/ -8% 64/ 1/ -7%/ -3% 64/ 10/ +32%/ +1% 64/ 20/ +4%/ -7% 256/ 1/ -6%/ -18% 256/ 10/ +33%/ 0% 256/ 20/ +4%/ -8% STREAM: size/session/+th...