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

# syscallbypid.d(1m)

syscalls by process ID. Uses DTrace.

## NAME

syscallbypid.d - syscalls by process ID. Uses DTrace.

## SYNOPSIS

**syscallbypid.d**

## DESCRIPTION

This reports the number of each type of system call made by PID. This is useful to identify which process is causing the most  system calls.

This is based on a script from DExplorer.

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

## EXAMPLES

- This samples until Ctrl-C is hit.

  \#  **syscallbypid.d**

## FIELDS

- PID

  process ID

- CMD

  process name

- SYSCALL

  system call name

- COUNT

  number of system calls made in this sample

## 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

syscallbypid.d will sample until Ctrl-C is hit.

## AUTHOR

Brendan Gregg \[Sydney, Australia\]

## SEE ALSO

procsystime(1M), dtrace(1M), [truss(1)](/truss/1.md)