Hello Ravi, I wonder what our last release for JSF 1.1 (1.0.11) does?
Not sure, perhaps you may also try the JSF 1.2 version ? (1.2.12) The JSF 1.2 version is the one that is best supported, these days. Trinidad 2.0 is now in alpha stage, and I can understand that you don't want to update on that version, now -Matthias On Sun, Jan 10, 2010 at 4:56 AM, Ravi <ravikapoor...@gmail.com> wrote: > > Scott, we do not have CPUs available. The time trinidad is consuming is > supposed to be doing some other work. Hence this is costing us real dollars > and hence our time and effort to resolve this. > > This is not initial hit of page. I always ignore the first hit on all pages, > I am only measuring CPU from 2nd hit onwards. > > Ravi > > > Scott O'Bryan wrote: >> >> I don't know. I'm of the camp that if the CPU time is available, use >> it. That said, is this load consistant or are you just testing an >> initial hit of each page. >> >> Sent from my iPhone >> >> On Jan 8, 2010, at 11:25 PM, Ravi <ravikapoor...@gmail.com> wrote: >> >>> Hi Jan-Kees, >>> >>> Now that I am reading your message again, I do want to answer your >>> questions in detail. First I agree reflection is cheap, that is why >>> reflection is not my concern. Time being spent in reflection is >>> almost negligible compared to time being spent in trinidad classes. >>> >>> Secondly IO and locking etc contribute to clock time but not to CPU >>> time. e.g. for IO, the thread may be in a wait state waiting for >>> data to arrive. In this case, the clock keeps ticking but such a >>> wait does not need CPU. My numbers are specifically CPU time. Which >>> means trinidad is not waiting but executing CPU instructions. >>> >>> This is why the user load is also irrelevant (high load leads to >>> adding clock time but not to CPU time). But since you asked, to get >>> these numbers, I am not doing a load testing. I am simply loading 4 >>> screens 4 times in order (total 16 screens). >>> >>> Regards >>> Ravi >>> >>> >>> >>> Jan-Kees van Andel wrote: >>>> >>>> I'm not sure, but I doubt the mailing list supports attachments. >>>> Maybe you could provide a link to some image hosting site? >>>> My first thought, reflection is darn cheap, especially since Java 5 >>>> and even more since Java 6. I'm no IBM JVM specialist, but I don't >>>> think there are major differences with HotSpot... Compared with SQL >>>> queries, backend transactions, web service calls, etc. reflective >>>> method invocations really don't make a difference. >>>> Having said that, what kind of application are you testing? Does this >>>> application have any I/O, locking or other expensive things that may >>>> be the cause of the CPU-time imbalance? >>>> Also, what kind of load are you simulating on your application? Long >>>> sessions with not much users? Lots of short sessions? Hyperactive >>>> users without any pauses? >>>> /JK >>>> Ps. How did you configure your profiler? Sampling or >>>> tracing/instrumentation? Although I don't think it makes a difference >>>> in this case, sampling is less accurate... >>>> 2010/1/8 Ravi Kapoor <ravikapoor...@gmail.com>: >>>>> >>>>> The actual call to getter method is only using 2% CPU. Rest 38% is >>>>> being >>>>> used within trinidad classes. >>>>> I am attaching two screenshots to give you more details. >>>>> >>>>> In first screenshot, you can see at the top left corner, total CPU >>>>> units >>>>> taken by getProperty are 32391 >>>>> getProperty calls javax.faces.el.ValueBinding.getValue which calls >>>>> org.apache.myfaces.el.PropertyResolverImpl.getValue which calls >>>>> org.apache.myfaces.el.PropertyResolverImpl.getProperty which calls >>>>> java.lang.reflect.Method.invoke. >>>>> >>>>> In second screenshot you can see that Method.invoke is using only >>>>> 1781 units >>>>> of CPU. Rest of the time is being spent within trinidad classes. >>>>> >>>>> Does this help? Also the rest of trinidad using 45% CPU usage is >>>>> also highly >>>>> concerning. >>>>> >>>>> Thanks >>>>> Ravi >>>>> >>>>> >>>>> On Fri, Jan 8, 2010 at 1:47 PM, Jan-Kees van Andel >>>>> <jankeesvanan...@gmail.com> wrote: >>>>>> >>>>>> Hey, >>>>>> >>>>>> Is it possible that the getProperty indirectly invokes some >>>>>> expensive >>>>>> computation? For example, do you have lots of logic inside your >>>>>> getters? >>>>>> >>>>>> Regards, >>>>>> Jan-Kees >>>>>> >>>>>> >>>>>> 2010/1/8 Ravi Kapoor <ravikapoor...@gmail.com>: >>>>>>> >>>>>>> Hi Matthias, >>>>>>> >>>>>>> Here are the details: >>>>>>> >>>>>>> Server: Websphere 6.1 >>>>>>> >>>>>>> Trinidad version: 1.0.7 (We cant upgrade to 2.0 until we upgrade >>>>>>> websphere >>>>>>> which will happen in due course. Even then if this issue has not >>>>>>> been >>>>>>> addressed, the problem may exist in 2.0 as well.) >>>>>>> >>>>>>> OS: Windows (Even though I am measuring numbers on windows but I >>>>>>> do not >>>>>>> think this is OS specific) >>>>>>> >>>>>>> >>>>>>> Let me know if you need to know anything else. >>>>>>> >>>>>>> Regards >>>>>>> Ravi >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Fri, Jan 8, 2010 at 1:09 AM, Matthias Wessendorf >>>>>>> <mat...@apache.org>wrote: >>>>>>> >>>>>>>> Hello Ravi, >>>>>>>> >>>>>>>> some more background would be good, e.g. what version of >>>>>>>> Trinidad etc. >>>>>>>> >>>>>>>> -Matthias >>>>>>>> >>>>>>>> On Thu, Jan 7, 2010 at 11:25 PM, Ravi Kapoor >>>>>>>> <ravikapoor...@gmail.com >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> Has anybody done performance tests on trinidad application. I >>>>>>>>> have an >>>>>>>>> application and it appears that it is taking 80-90% of CPU in my >>>>>>>>> application, thus killing performance. >>>>>>>>> >>>>>>>>> We ran load tests and our CPU went to 100% usage. At this >>>>>>>>> point we >>>>>>>> >>>>>>>> measured >>>>>>>>> >>>>>>>>> how much time was being taken by each class/method. Here are >>>>>>>>> some >>>>>>>>> interesting figures: >>>>>>>>> >>>>>>>>> CPU usage by all Trinidad + myfaces classes = 80-90% >>>>>>>>> Myfaces CPU usage (without trinidad) = 8% (which implies >>>>>>>>> trinidad is >>>>>>>> >>>>>>>> taking >>>>>>>>> >>>>>>>>> 70-80% of CPU) >>>>>>>>> Total time taken by one method >>>>>>>>> (org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty) = >>>>>>>>> 40% >>>>>>>>> >>>>>>>>> Can anybody confirm that they have seen this behavior? >>>>>>>>> Or if somebody can confirm that this does not happen in their >>>>>>>>> performance >>>>>>>>> tests, that should help too. >>>>>>>>> >>>>>>>>> Thanks >>>>>>>>> Ravi >>>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> Matthias Wessendorf >>>>>>>> >>>>>>>> blog: http://matthiaswessendorf.wordpress.com/ >>>>>>>> sessions: http://www.slideshare.net/mwessendorf >>>>>>>> twitter: http://twitter.com/mwessendorf >>>>>>>> >> > > -- Matthias Wessendorf blog: http://matthiaswessendorf.wordpress.com/ sessions: http://www.slideshare.net/mwessendorf twitter: http://twitter.com/mwessendorf
