Analyzer sys-softirq-stats

# Name

sys-softirq-stats - System Softirq Statistics

This analyzer monitors system softirq (software interrupt) activity. It captures softirq counts broken down by type (such as NET_RX, NET_TX, TIMER, SCHED, RCU, etc.) and measures per-CPU softirq utilization during the sampling period. The analyzer presents data in bar chart format.

# Resource Category

CPU.

# Application Type & Technical Stack

• All

# Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run sys-softirq-stats -p PID

# trace a shell command directly
orxray analyzer run sys-softirq-stats -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run sys-softirq-stats -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run sys-softirq-stats --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Tables
• Plain Texts

# Output Example

[
  {
    "data": [
      [ "CPU", "dropped", "time_squeeze", "processed" ],
      [ "cpu0", 0, 0, 2 ],
      [ "cpu1", 0, 0, 54 ]
    ],
    "type": "table",
    "title": "5s softnet statistics from /proc/net/softnet_stat",
    "subtitle": "Increase netdev_max_backlog if dropped > 0; Increase netdev_budget if time_squeeze > 0"
  },
  {
    "data": [
      [ "CPU" "BLOCK", "HI", "SCHED", "TIMER", "TASKLET", "HRTIMER", "NET_TX", "RCU", "NET_RX", "IRQ_POLL" ],
      [ "cpu0", "0.0", "0.0", "127.0", "6.0", "0.0", "0.0", "0.0", "77.0", "2.0", "0.0" ],
      [ "cpu1", "0.0", "0.0", "103.0", "80.0", "0.0", "0.0", "0.0", "155.0", "0.0", "0.0" ]
    ],
    "type": "table",
    "title": "5s sofirq statistics from /proc/softirqs"
  },
  {
    "data": [
      [ "CPU", "user", "system", "iowait", "idle", "nice", "irq", "softirq", "steal" ],
      [ "cpu", "0.6%", "0.4%", "0.0%", "99.0%", "0.0%", "0.0%", "0.0%", "0.0%" ],
      [ "cpu0", "0.2%", "0.2%", "0.0%", "99.6%", "0.0%", "0.0%", "0.0%", "0.0%" ],
    ],
    "type": "table",
    "title": "CPU usage"
  }
]

# Author

The OpenResty Inc. Team.

# Copyright

Copyright (C) by OpenResty Inc. All rights reserved.