Re: Profiling tomcat with java profiler
On 08/09/2012 08:43 PM, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ragini, On 8/9/12 5:51 AM, Ragini wrote: what my profiler profiles:- It gives me xml file containing list of methods in a proper sequence in which they were executed while running the server. *My question:* I do the above 3 steps 2 times in exactly same manner. So I have two output files say file1 and file2. I expected these files to be exactly same because I start the server, access the same application and stop the serever. But it seems that both files differ. I don't understand why. Could you please tell me why does it differ ? Are not methods of tomcat executed in exactly same manner for a same action ? Please find the files attach which I get two different files (file1.xml) and (file2.xml). I have attached differences also which it gives. I find these differences by parsing files. Instead of dropping two files on the list, why don't you tell us what the differences are (in general). It's fine to provide full the full data to us, but don't make us wade-through it just ti get our bearings. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlAkBM4ACgkQ9CaO5/Lv0PABkwCgwBrx7e3igfv6LC+hANm67WB+ 9/EAnj6epnxfOnlATp5IJmkotFXFQtDB =n8DM -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org Hi Chris, Actually I could not understand the exact differences and why they exist. But in general it seems that sequence of methods which starts from org/apache/catalina/startup/HostConfig$DeployWar; name=run, and org/hsqldb/store/HashIndex; name=getNextLookup differes in both the files. I have uploaded the differences file (abranchdifferences) also. So If you kindly have look on few of it, you might get some idea. Thanks and Regards. Ragini. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Profiling tomcat with java profiler
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ragini, On 8/10/12 4:25 AM, Ragini wrote: On 08/09/2012 08:43 PM, Christopher Schultz wrote: Ragini, On 8/9/12 5:51 AM, Ragini wrote: what my profiler profiles:- It gives me xml file containing list of methods in a proper sequence in which they were executed while running the server. *My question:* I do the above 3 steps 2 times in exactly same manner. So I have two output files say file1 and file2. I expected these files to be exactly same because I start the server, access the same application and stop the serever. But it seems that both files differ. I don't understand why. Could you please tell me why does it differ ? Are not methods of tomcat executed in exactly same manner for a same action ? Please find the files attach which I get two different files (file1.xml) and (file2.xml). I have attached differences also which it gives. I find these differences by parsing files. Instead of dropping two files on the list, why don't you tell us what the differences are (in general). It's fine to provide full the full data to us, but don't make us wade-through it just ti get our bearings. -chris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org Hi Chris, Actually I could not understand the exact differences and why they exist. But in general it seems that sequence of methods which starts from org/apache/catalina/startup/HostConfig$DeployWar; name=run, and org/hsqldb/store/HashIndex; name=getNextLookup differes in both the files. I have uploaded the differences file (abranchdifferences) also. So If you kindly have look on few of it, you might get some idea. The JVM is threaded and therefore nondeterministic when it comes to the exact order of calls, etc. across the whole JVM. If you are talking about the ordering of certain calls from a /single thread/, then those ought to be entirely deterministic and I would not expect to see any deviation between two runs of the same container/webapp/configuration. If you'd like to call our attention to a specific thread of execution that seems to behave differently in the two separate traces, I might consider looking. But I'm not even going to open those files until you get me that far: I'm simply not going to stare at two complete JVM call traces generated by a not widely used profiler for academic interest. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlAlHtsACgkQ9CaO5/Lv0PDrcwCeIhQir52hFfhSqphRp/C0Mwqb hXAAoKBrD6Avrm3OEZAKFMJ4W0ikV0cH =6QXF -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Profiling tomcat with java profiler
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ragini, On 8/9/12 5:51 AM, Ragini wrote: what my profiler profiles:- It gives me xml file containing list of methods in a proper sequence in which they were executed while running the server. *My question:* I do the above 3 steps 2 times in exactly same manner. So I have two output files say file1 and file2. I expected these files to be exactly same because I start the server, access the same application and stop the serever. But it seems that both files differ. I don't understand why. Could you please tell me why does it differ ? Are not methods of tomcat executed in exactly same manner for a same action ? Please find the files attach which I get two different files (file1.xml) and (file2.xml). I have attached differences also which it gives. I find these differences by parsing files. Instead of dropping two files on the list, why don't you tell us what the differences are (in general). It's fine to provide full the full data to us, but don't make us wade-through it just ti get our bearings. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlAkBM4ACgkQ9CaO5/Lv0PABkwCgwBrx7e3igfv6LC+hANm67WB+ 9/EAnj6epnxfOnlATp5IJmkotFXFQtDB =n8DM -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
