cpuwalk.d - Measure which CPUs a process runs on. Uses DTrace. cpuwalk.d [duration] 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 the root user or users with the dtrace_kernel privilege can run this command. Any stable.

this runs until Ctrl-C is hit, # cpuwalk.d

run for 5 seconds, # cpuwalk.d 5

PID process ID

CMD process name

value CPU id

count number of samples (sample at 100 hz)

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. cpuwalk.d will run until Ctrl-C is hit, or the duration specified is reached. threaded.d(1M), dtrace(1M)