Here's a bit of info on difference between linux and windows with regard to JVM that "might" explain the performance difference.
Getting currentTimeMillis and nano time has a higher overhead on linux versus windows. For things like stress testing and benchmark tools like JMeter, getting time is a significant part of the application. >From first hand experience, it can be as little as 2% or as high as 10% depending on how often your code gets time from the system. The bigger difference is CPU usage. I have seen linux take considerably more CPU resources when I run benchmarks on apps using unit tests, jmeter or other stress testing tools that frequently get time. On Wed, Dec 14, 2011 at 7:41 AM, Deepak Goel <deic...@gmail.com> wrote: > Hey > > Looking at your configuration, here is a possible theory... > > Sun Microsystem (Sun JDK) was eaten by Oracle which runs on WINTEL > platforms so the performance of SUN JDK is optimized on INTEL > platforms. OpenJDK is meant for Linux platforms a late entry for INTEL > into this game and hence low performance and high CPU peaks... > > Deepak > > On 12/14/11, Toni Menendez Lopez <tonime...@gmail.com> wrote: >> My loadserver is running in this server, >> >> Hardware : >> >> Proliant BL460C G1 >> 2xIntel Xeon @2,53Ghz (quad) >> 32 GB of memory >> >> O.S : >> RHEL5.4(Tikanga) >> >> I don´t have stats about that but I will collect in few days that I >> will have again the server available, but my impression is that JMeter >> is taking much more CPU with OpenJDK and is doing lots of big peaks, >> seems problems with GC. >> >> But I will analyze it later, when my actual testing finished. >> >> Toni. >> >> >> 2011/12/13, Deepak Goel <deic...@gmail.com>: >>> Hey >>> >>> Looks like an evolution and quality problem..Sun JDK more evolved v/s >>> OpenJDK >>> >>> What is the hardware? What is the performance difference? Stats please... >>> >>> Deepak >>> >>> On 12/13/11, Toni Menendez Lopez <tonime...@gmail.com> wrote: >>>> Hello all, >>>> >>>> I want to ask all of you on question ! >>>> >>>> I am normally working with SunJDK for Jmeter and running in non-gui >>>> mode, but now I want to migrate the openJDK ( OpenJDK 64-Bit Server VM >>>> (build 1.6.0-b09, mixed mode)). >>>> >>>> I have executed the same test in SunJDK and OpenJDK and I have >>>> experienced that Jmeter has worst performance sending the traffic with >>>> OPenJDK that with SunJDK. >>>> >>>> Any of you have got some similar experience ? >>>> >>>> My O.S is RHEL5.4 >>>> >>>> Best regards, >>>> >>>> Toni. >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org >>>> For additional commands, e-mail: user-h...@jmeter.apache.org >>>> >>>> >>> >>> >>> -- >>> Namaskara~Nalama~Guten Tag~Bonjour >>> >>> >>> -- >>> Keigu >>> >>> Deepak >>> +91-9765089593 >>> deic...@gmail.com >>> http://www.simtree.net >>> >>> Skype: thumsupdeicool >>> Google talk: deicool >>> Blog: http://loveandfearless.wordpress.com >>> Facebook: http://www.facebook.com/deicool >>> >>> "Contribute to the world, environment and more : >>> http://www.gridrepublic.org >>> " >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org >>> For additional commands, e-mail: user-h...@jmeter.apache.org >>> >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org >> For additional commands, e-mail: user-h...@jmeter.apache.org >> >> > > > -- > Namaskara~Nalama~Guten Tag~Bonjour > > > -- > Keigu > > Deepak > +91-9765089593 > deic...@gmail.com > http://www.simtree.net > > Skype: thumsupdeicool > Google talk: deicool > Blog: http://loveandfearless.wordpress.com > Facebook: http://www.facebook.com/deicool > > "Contribute to the world, environment and more : http://www.gridrepublic.org > " > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org > For additional commands, e-mail: user-h...@jmeter.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@jmeter.apache.org For additional commands, e-mail: user-h...@jmeter.apache.org
