Latency Meter

Introduction

The latency meter tool will continuously curl to an HTTP endpoint and show the measured roundtrip time (or other metrics as desired).

Description

There are two scripts provided:

• latency-realtime.sh: This script will continuous ping the URL provided (at the desired frequency) and the measured roundtrip time is continuously output as a since coloured meter (see below).
• latency-timeseries.sh: This script will continuous ping the URL provided (at the desired frequency) and the measured roundtrip time is continuously output as a single column CSV file to stdout (you can redirect it into a file if you choose).

In addition, there is a helper script provided:

• open-tmux-panes.sh: You can modify this script to help to start a multi-pane tmux session logged into various ssh servers. From there you can run the latency meter on each one synchronous and inspect the differences (see screenshots below).
  • NOTE: You need to install tmux and xpanes

Usage

• latency-realtime.sh [URL] [FREQUENCY]
• latency-timeseries.sh [URL] [FREQUENCY] [COUNT]

Defaults

• URL: http://www.google.com
• FREQUENCY: 1 (seconds)
• COUNT: 50 (iterations)

Examples

latency-realtime.sh

latency-timeseries.sh

License

This repository is licensed under the Apache v2.0 license. More information can be found here.