Thanks David! You are right, removing tcmalloc for nox_core solved the problem.
--8<---------------cut here---------------start------------->8--- $ dpkg -l | grep tcmalloc ii libtcmalloc-mi 1.5-1 an efficient thread-caching malloc $ nox_core -i ptcp:6633 switch -l ~/usr/bin/nox -t 7 $ cbench -c localhost -p 6633 -m 10000 -l 10 -s 32 -M 1000000 -t cbench: controller benchmarking tool running in mode 'throughput' connecting to controller at localhost:6633 faking 32 switches :: 10 tests each; 10000 ms per test with 1000000 unique source MACs per switch starting test with 0 ms delay after features_reply ignoring first 1 "warmup" and last 0 "cooldown" loops debugging info is off 32 switches: fmods/sec: 630907 ... total = 1977.609403 per ms 32 switches: fmods/sec: 799125 ... total = 2558.905526 per ms 32 switches: fmods/sec: 903720 ... total = 2901.221645 per ms 32 switches: fmods/sec: 900237 ... total = 2868.801376 per ms 32 switches: fmods/sec: 875842 ... total = 2825.217623 per ms ... --8<---------------cut here---------------end--------------->8--- This is a reasonably powerful machine, that is, --8<---------------cut here---------------start------------->8--- $ cat /etc/debian_version 6.0.3 $ uname -a Linux odun 2.6.32-5-amd64 #1 SMP Thu Nov 3 03:41:26 UTC 2011 x86_64 GNU/Linux $ grep ^processor /proc/cpuinfo | wc -l 8 $ grep "^model name" /proc/cpuinfo | head -n 1 model name : Intel(R) Xeon(R) CPU E5606 @ 2.13GHz --8<---------------cut here---------------end--------------->8--- I still couldn't understand how do you get the results at million level in your comparisons. Am I missing something? What should I suspect? Can tcmalloc cause such a 1000x performance impact? Best. On Tue, 27 Dec 2011 10:44:39 -0800, David Erickson writes: > What tcmalloc version do you have, and what OS? Try launching without > tcmalloc, > on some combinations NOX would just hang when a switch connects and you are > using tcmalloc. _______________________________________________ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
