Hi All, I just wanted to check if anybody had a comment on this query.
Thanks, -Shrinivas On Wed, Jun 16, 2010 at 9:50 PM, Shrinivas Joshi <jshrini...@gmail.com>wrote: > Sorry if this is repeat email for you, I did send this to common-dev list > as well. > > Hello, > I am trying to get profiles for a workload running on top of Hadoop 0.20.2 > framework. The workload jars and Hadoop jars have been compiled with debug > symbols enabled. I could see local variable tables and line number tables in > the jar class files using javap. I am passing the right value for * > agentpath* flag pointing to oprofile JVMTI agent and I am also seeing it > passed correctly to map and reduce JVMs from *ps *output. This is done > through conf/mapred-site.xml properties. However, in the profiles I am > unable to see meaningful samples for JITed code; everything is getting > attributed to anon samples. > > Profiling a test app works just fine with the same JVM that is being used > by Hadoop. I can see the right debug symbols being attributed in the > resulting profiling. In fact, I even tried profiling a JVM process that was > spawned using *ProcessBuilder* API, the way Hadoop spawns its map and > reduce JVMs, that seem to work fine too. > > Does anybody have any pointers as to what I might be missing here? Has > anybody successfully collected profiles showing JIT debug symbols for any > Hadoop workload? I am using OProfile 0.9.6. > > Thanks, > > -Shrinivas >
