linux_proc

Description:

linux proc

linux_proc: Linux process utilities #
A Dart package to read Linux system statistics, process status and DBus services.
DBus is still very much a work in progress.
Note this library only supports Linux
Features #

Parses the procfs(5) /proc filesystem for Linux system and process information
Parses the output of systemd DBus queries for Systemd service status (WIP)

Using the API #
// create a stats manager
final statsManager = StatsManager(refreshTimeSeconds: 2, queueSize: 100);

// get the stream of statistics.
await for (final stat in statsManager.stream) {
// stat ref contains cpus stats, process info, etc.
}

// To pause stats collection
statsManager.setRefreshTime(0);

// to start it again
statsManager.setRefreshSeconds(4);

// get the queue of the last N results
var q = statsManager.statsQueue;

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Dart Top #
See dtop for an example of how to use this package to implement a Dart version of the Linux top(1) command.
cd dtop
dart pub get
dart run bin/dtop.dart
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Performance #
This library uses the synchronous versions of most dart:io file system calls to parse the procfs filesystem.
The overhead is much lower using synchronous calls. For example, using async i/o, the dtop command consumes approx. 8% of a virtual CPU when the statistics are refreshed every 2 seconds. Using Synchronous i/o brings this down to approx. 3%.
If you are going to use this library in a Flutter application, you may need to run the statistics gathering in an isolate to avoid blocking the UI thread.