NAME

j_cpudist.d - measure Java on-CPU times for different types of operation.

SYNOPSIS

j_cpudist.d [top]

DESCRIPTION

This traces activity from all Java processes on the system with hotspot provider support (1.6.0). Method calls are only visible when using the flag "+ExtendedDTraceProbes". eg, java -XX:+ExtendedDTraceProbes classfile

The "top" optional argument will truncate the output for each report section to that many lines, with a default of 10.

OS

Solaris

STABILITY

Evolving - uses the DTrace hotspot provider, which may change as additional features are introduced. Check Java/Readme to see what version these scripts are based on.

EXAMPLES

Default output,: # j_cpudist.d

FIELDS

1: Process ID
2: Type of call (method/gc)
3: Name of call

DOCUMENTATION

See the DTraceToolkit for further documentation under the Examples, Notes and Docs directories. The example files may be especially useful as they aim to demonstrate how to interpret the output.

EXIT

j_cpudist.d will run until Ctrl-C is hit.

AUTHOR

Brendan Gregg [CA, USA]