NAME

hotuser - sample on-CPU user-level functions and libraries.

SYNOPSIS

hotuser [-hl] { -c command | -p PID }

DESCRIPTION

This samples the on-CPU function at 1001 Hertz, for a simple yet effective user-level profiling tool for sampling exclusive function time. The output will identify which function is on the CPU the most - which is the hottest. See Notes/ALLexclusive_notes.txt for an explanation of exclusive time.

OS

Solaris

STABILITY

stable - Written using Perl and DTrace (Solaris 10 03/05)

EXAMPLES

Sample user functions from PID 81,

# hotuser -p 81

Sample user libraries from PID 81,

# hotuser -lp 81

Sample Xorg,

# hotuser `pgrep -n Xorg`

DOCUMENTATION

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output.

EXIT

hotuser will run until Ctrl-C is hit.

AUTHOR

Brendan Gregg [CA, USA]

SEE ALSO

dtrace(1M), hotkernel(1M)