NAME

cpuwalk.d - Measure which CPUs a process runs on. Uses DTrace.

SYNOPSIS

cpuwalk.d [duration]

DESCRIPTION

This program is for multi-CPU servers, and can help identify if a process is running on multiple CPUs concurrently or not.

A duration may be specified in seconds.

Since this uses DTrace, only users with root privileges can run this command.

EXAMPLES

this runs until Ctrl-C is hit,: # cpuwalk.d
run for 5 seconds,: # cpuwalk.d 5

FIELDS

PID: process ID
CMD: process name
value: CPU id
count: number of samples (sample at 100 hz)

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

cpuwalk.d will run until Ctrl-C is hit, or the duration specified is reached.