net.isr

Plugin: freebsd.plugin Module: net.isr

Overview

Collect information about system softnet stat.

The plugin calls sysctl function to collect necessary data.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

This integration doesn't support auto-detection.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per net.isr instance

These metrics show statistics about softnet stats.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
system.softnet_stat	dispatched, hybrid_dispatched, qdrops, queued	events/s

Per core

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
cpu.softnet_stat	dispatched, hybrid_dispatched, qdrops, queued	events/s

Alerts

The following alerts are available:

Alert name	On metric	Description
1min_netdev_backlog_exceeded	system.softnet_stat	average number of dropped packets in the last minute due to exceeded net.core.netdev_max_backlog
1min_netdev_budget_ran_outs	system.softnet_stat	average number of times ksoftirq ran out of sysctl net.core.netdev_budget or net.core.netdev_budget_usecs with work remaining over the last minute (this can be a cause for dropped packets)
10min_netisr_backlog_exceeded	system.softnet_stat	average number of drops in the last minute due to exceeded sysctl net.route.netisr_maxqlen (this can be a cause for dropped packets)

Setup

Prerequisites

No action required.

Configuration

File

The configuration file name for this integration is netdata.conf. Configuration for this specific integration is located in the [plugin:freebsd:net.isr] section within that file.

The file format is a modified INI syntax. The general structure is:

[section1]
    option1 = some value
    option2 = some other value

[section2]
    option3 = some third value

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config netdata.conf

Options

Config options

Name	Description	Default	Required
netisr	Enable or disable general vision about softnet stat metrics.	yes	no
netisr per core	Enable or disable softnet stat metric per core.	yes	no

Examples

There are no configuration examples.