–Xeprof and –agentlib:hprof Profiling Options and Their Corresponding Metrics

The following metrics or features are available depending on the profiling option used to collect data.

Table 5-4 Available Metrics or Features from -Xeprof and -agentlib:hprof Data

Feature	-Xeprof	-agentlib:hprof
Feature	-Xeprof	cpu=samples	cpu=times	cpu=old	heap=dump	heap=sites
Method Call Count	Yes	No	Yes ²	Yes	N/A	N/A
Exclusive Method Times (CPU)	Yes	Yes ¹	Yes ¹	Yes ¹	N/A	N/A
Exclusive Method Clock Times	Yes	No	No	No	N/A	N/A
Call Graph Tree with Call Count	Yes	No	Yes ²	Yes	N/A	N/A
Call Graph Tree with Clock Time	Yes	No	No	No	N/A	N/A
Call Graph Tree with CPU	Yes	Yes ^1,2	Yes ^1,2	Yes ¹	N/A	N/A
Inclusive Method CPU Times	Yes	Yes ^1,2	Yes ^1,2	Yes ¹	N/A	N/A
Inclusive Method Clock Times	Yes	No	No	No	N/A	N/A
Threads/Groups Histogram	Yes	Yes ³	Yes ³	No	Yes ³	Yes ³
Objects Created by Method	Yes ^2,4	N/A	Yes ²	Yes ²	No	Yes
Created Objects (Count)	Yes ^2,4	N/A	Yes ²	Yes ²	No	Yes
Created Objects (Bytes)	No	N/A	N/A	N/A	No	Yes
Live Objects (Count)	No	N/A	N/A	No	Yes	No
Live Objects (Bytes)	No	N/A	N/A	No	Yes	No
Live Array Sizes	No	N/A	N/A	No	Yes	No
Reference Graph Tree	No	N/A	N/A	No	Yes	No
Residual Objects (Count)	No	N/A	N/A	N/A	Yes	Yes
Residual Objects (Bytes)	No	N/A	N/A	N/A	Yes	Yes
Contested Lock Claims by Method	Yes	No	No	No	N/A	N/A
All Lock Claims by Method	Yes	No	No	No	N/A	N/A
Lock Delay - Method Exclusive	Yes	No	No	No	N/A	N/A
Lock Delay - Call Graph Tree	Yes	No	No	No	N/A	N/A
Lock Delay - Method Inclusive	Yes	No	No	No	N/A	N/A
Average Exclusive Method CPU Times*	Yes	No	Yes ^1,2	Yes ¹	N/A	N/A
Average Exclusive Method Clock Times*	Yes	No	No	No	N/A	N/A
Average Inclusive Method CPU Times*	Yes	No	Yes ^1,2	Yes ¹	N/A	N/A
Average Inclusive Method Clock Times*	Yes	No	No	No	N/A	N/A
Starvation by Method*	Yes	No	No	No	N/A	N/A
Starvation Ratio*	Yes	No	No	No	N/A	N/A
Methods with Loops*²	Yes	No	Yes	Yes	N/A	N/A
Lock Contention Ratio by Method*	Yes	No	No	No	N/A	N/A
Average Exclusive Method Lock Delay*	Yes	No	No	No	N/A	N/A
Exclusive Method Lock Delay / Clock Time*	Yes	No	No	No	N/A	N/A
Average Inclusive Method Lock Delay*	Yes	No	No	No	N/A	N/A
Inclusive Method Lock Delay / Clock Time*	Yes	No	No	No	N/A	N/A
Exclusive Class CPU Times*	Yes	Yes ¹	Yes ¹	Yes ¹	N/A	N/A
Exclusive Class Clock Times*	Yes	No	No	No	N/A	N/A
Exclusive Class Lock Delay*	Yes	No	No	No	N/A	N/A
Inline Candidates heuristics	Yes	No	Yes	Yes	N/A	N/A
Exceptions Thrown heuristics	Yes	No	Yes	Yes	N/A	N/A
Memory Leaks heuristics	No	N/A	N/A	No	Yes	No
Allocation sites for objects	Yes ⁴	N/A	Yes	Yes	Yes	Yes
Per-thread or per-thread-group view	Yes	Yes ³	Yes ³	No	N/A	Yes ³
Profiling intrusion compensation	Yes	No	No	No	N/A	N/A

¹ Virtual CPU times, unless on HP-UX; some platforms report clock times

² Metric values estimated only

³ Requires thread=y (no color-coding or start/stop times available for threads)

⁴ Requires inlining=disable or running the VM in interpreted mode

N/A (not applicable) means the option is irrelevant to the particular feature.

* (asterisk) means this metric is a combination of one or more measures.

–Xeprof and –agentlib:hprof Profiling Options and Their Corresponding Metrics

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