---
name: "sampleproc"
section: "1m"
platform: "macos"
package: "dtrace"
version: "413"
release: "macOS 26.5"
platforms: ["macos"]
url: "https://new.carta.tech/sampleproc"
---

# sampleproc(1m)

sample processes on the CPUs. Uses DTrace.

## NAME

sampleproc - sample processes on the CPUs. Uses DTrace.

## SYNOPSIS

**sampleproc \[hertz\]**

## DESCRIPTION

This program samples which process is on each CPU, at a particular configurable rate. This can be used as an estimate for which process is consuming the most CPU time.

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

## EXAMPLES

- Sample at 100 hertz,

  \#  **sampleproc**

- Sample at 400 hertz,

  \#  **sampleproc** 400

## FIELDS

- PID

  process ID

- COMMAND

  command name

- COUNT

  number of samples

- PERCENT

  percent of CPU usage

## BASED ON

/usr/demo/dtrace/prof.d

## DOCUMENTATION

DTrace Guide "profile Provider" chapter (docs.sun.com)

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

sampleproc will sample until Ctrl-C is hit.

## SEE ALSO

dtrace(1M)