On Wed, Oct 26, 2011 at 7:32 PM, Andreas Voellmy <andreas.voel...@gmail.com> wrote: > On Wed, Oct 26, 2011 at 8:42 PM, Amin Tootoonchian <a...@cs.toronto.edu> > wrote: >> >> I only updated the 'switch' app in that code base, and I never looked >> at 'hub'. My guess is that the hub app is doing so little that locking >> within boost::asio scheduler outweights the actual work done by the >> hub app. We need to make sure that the amount of work done by each >> thread upon its invocation is significantly more than the locking >> overhead in boost::asio's internal job queue. >> > > I'm unclear about how components in the destiny branch work. Do the handlers > run concurrently by default, or is there something extra that one has to > write to get them to execute concurrently? If something extra is needed, > what is it in switch.cc that makes it execute concurrently? Or are you > saying that the event handlers in 'hub' are indeed running concurrently, but > they aren't doing enough work to get much performance gain? (By the way, I > was looking at /src/nox/coreapps/switch/switch.cc > and /src/nox/coreapps/hub/hub.cc) > > Thanks, > Andreas
They run concurrently by default. They should be indeed running concurrently, but I am guessing locking overhead within boost::asio significantly outweights the actual work done by each thread. It shouldn't be hard to fix, but not worth it since we consider that code base to be just a proof of concept. Thanks, Amin >> >> Cheers, >> Amin >> >> P.S.: Btw, passing '--enable-ndebug' to configure should boost the >> performace. >> >> On Wed, Oct 26, 2011 at 2:08 PM, Andreas Voellmy >> <andreas.voel...@gmail.com> wrote: >> > Thanks. The code compiled after configuring without python. >> > I was able to get roughly the same kind of performance out of the >> > 'switch' >> > application that is mentioned on the performance page >> > >> > (http://www.openflow.org/wk/index.php/Controller_Performance_Comparisons). >> > However, the 'hub' controller doesn't have much speedup when running >> > with >> > more threads. For example, when running with one thread I get a >> > throughput >> > of 213868.81 and when I run it with 8 threads I get a throughput >> > of 264017.35. (To run with 8 threads, I am starting the controller like >> > this: "./nox_core -i ptcp:9999 hub -t 8"; I am testing with cbench in >> > throughput mode "cbench -p 9999 -t") >> > Is this - that 'hub' gets not much speedup while 'switch' gets lots of >> > speedup - expected with this branch of NOX? Is there something that >> > needs to >> > be done to hub in order to enable the framework to run it concurrently? >> > Regards, >> > Andreas >> > >> > On Wed, Oct 26, 2011 at 5:53 AM, Murphy McCauley <jam...@nau.edu> wrote: >> >> >> >> This branch is quite a bit behind the actual development. We're >> >> preparing >> >> to release the updated codebase in the near future. >> >> But for one thing, Python doesn't work in it. So you probably need to >> >> do >> >> --with-python=no when you run configure. >> >> Hope that helps. >> >> -- Murphy >> >> On Oct 25, 2011, at 8:49 PM, Andreas Voellmy wrote: >> >> >> >> Thanks. I tried editing the conflict marker out in a couple ways that >> >> seemed reasonable to me, but I got other compile errors. Does anyone >> >> know if >> >> there is a known working version of this branch in the repository, and >> >> how I >> >> can get back to it? >> >> Thanks, >> >> Andreas >> >> >> >> 2011/10/25 Zoltán Lajos Kis <zoltan.lajos....@ericsson.com> >> >>> >> >>> Seems like someone checked in a conflict marker to that file: >> >>> >> >>> >> >>> >> >>> http://noxrepo.org/cgi-bin/gitweb.cgi?p=nox;a=blob;f=src/nox/coreapps/pyrt/context.i;h=cb8641d72feb3a1f0543e97830a2addd55d502b9;hb=dev/destiny-fast#l83 >> >>> >> >>> Z. >> >>> >> >>> ________________________________________ >> >>> From: nox-dev-boun...@noxrepo.org [nox-dev-boun...@noxrepo.org] On >> >>> Behalf >> >>> Of Andreas Voellmy [andreas.voel...@gmail.com] >> >>> Sent: Wednesday, October 26, 2011 4:40 AM >> >>> To: nox-dev@noxrepo.org >> >>> Subject: [nox-dev] Error building dev/destiny-fast branch >> >>> >> >>> Hi, >> >>> >> >>> I'd like to try the destiny-fast branch (I saw it mentioned here: >> >>> >> >>> http://www.openflow.org/wk/index.php/Controller_Performance_Comparisons), >> >>> so >> >>> I did the following >> >>> >> >>> git clone git://noxrepo.org/nox<http://noxrepo.org/nox> >> >>> cd nox >> >>> git checkout dev/destiny-fast >> >>> >> >>> Is that the right way to get this branch? After that I ran >> >>> ./boot.sh >> >>> mkdir build >> >>> cd build >> >>> ../configure >> >>> make >> >>> >> >>> and got the following error: >> >>> >> >>> Making all in pyrt >> >>> make[8]: Entering directory >> >>> `/home/av/Download/nox-destiny/nox/build/src/nox/coreapps/pyrt' >> >>> /usr/bin/swig -c++ -python -DSWIGWORDSIZE64 >> >>> -I../../../../../src/include/openflow -I../../../../../src/nox/lib/ >> >>> -outdir >> >>> ./. -o oxidereactor_wrap.cc -module oxidereactor >> >>> ../../../../../src/nox/coreapps/pyrt/oxidereactor.i >> >>> /usr/bin/swig -c++ -python -DSWIGWORDSIZE64 -outdir ./. -o >> >>> deferredcallback_wrap.cc -module deferredcallback >> >>> ../../../../../src/nox/coreapps/pyrt/deferredcallback.i >> >>> /usr/bin/swig -c++ -python -DSWIGWORDSIZE64 >> >>> -I../../../../../src/include/openflow -I../../../../../src/nox/lib/ >> >>> -outdir >> >>> ./. -o pycomponent_wrap.cc -module pycomponent >> >>> ../../../../../src/nox/coreapps/pyrt/component.i >> >>> ../../../../../src/nox/coreapps/pyrt/context.i:79: Error: Syntax error >> >>> in >> >>> input(3). >> >>> make[8]: *** [pycomponent.py] Error 1 >> >>> >> >>> Does anyone know what went wrong and how to fix this? >> >>> >> >>> Thanks, >> >>> Andreas >> >>> >> >> >> >> _______________________________________________ >> >> nox-dev mailing list >> >> nox-dev@noxrepo.org >> >> http://noxrepo.org/mailman/listinfo/nox-dev >> >> >> > >> > >> > _______________________________________________ >> > nox-dev mailing list >> > nox-dev@noxrepo.org >> > http://noxrepo.org/mailman/listinfo/nox-dev >> > >> > > > _______________________________________________ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
