@Peter can you please combine your two mails and restate what you are trying to point out. Seems they mean different things:
---------------------- Getting currentTimeMillis and nano time has a higher overhead on "linux versus windows" The difference between using currentTimeMillis versus nano time is about 20-30% overhead "regardless of the operating system" or version of JVM. ---------------------- Also can you please mention exactly what hardware have you measured your results for? On 12/14/11, Peter Lin <wool...@gmail.com> wrote: > I'll add a little bit more. > > The difference between using currentTimeMillis versus nano time is > about 20-30% overhead regardless of the operating system or version of > JVM. > > I've seen this first hand with Sun, IBM and JRockit on windows and linux. > > OpenJDK is mostly the same as SunJDK, so there's very little > difference from a performance perspective. the SunJDK usually doesn't > include the experimental stuff that OpenJDK might have. > > 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 > > -- 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
