---
name: "queuelat"
section: "8"
platform: "linux"
package: "rt-tests"
version: "2.11-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/queuelat"
---

# queuelat(8)

Queue latency test program

\# SPDX-License-Identifier: GPL-2.0-or-later

## NAME

queuelat - Queue latency test program

## SYNOPSIS

queuelat \[-c\|--cycles N\] \[-f\|--freq F\] \[-h\|--help\] \[-m\|--max-len LEN\] \[-p\|--packets F\] \[-q\|--queue-len N\] \[-t\|--timeout TIME\]

## DESCRIPTION

queuelat simulates a network queue checking for latency violations in packet processing.

## OPTIONS

A summary of options is included below.

- **-c, --cycles=N**

  Estimated number of cycles it takes to process one packet. This value should come from the envisioned packet forwarding application being simulated.

- **-f, --freq=F**

  TSC frequency in MHz.

- **-h, --help**

  Show help

- **-m, --max-len=N**

  Maximum allowed latency, in nanoseconds. If latency to process any packet exceeds this value, the program quits, writing a message to the trace buffer.

- **-p, --packets=F**

  Million packets per second that arrive for processing.

- **-q, --queue-len=N**

  Minimum queue length to print in the trace

- **-t, --timeout=TIME**

  Timeout in seconds to quit the program.

## AUTHOR

queuelat was written by Marcelo Tosatti \<mtosatti@redhat.com\>\