How to Impose High CPU Load and Stress Test on Linux Using ‘Stress-ng’ Tool

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Aaron Kili

Aaron Kili is a Linux and F.O.S.S enthusiast, an upcoming Linux SysAdmin, web developer, and currently a content creator for TecMint who loves working with computers and strongly believes in sharing knowledge.

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7 Responses

  1. Florian Bador says:

    --vm-bytes is NOT per vm worker but for all workers combined, so you can put almost all your memory if you boot without X.

  2. Shashi says:

    Do we have this tool in freeBSD?

    • Ravi Saive says:


      Yes, you can install stress-ng tool on FreeBSD system to imposes certain types of high CPU Load on your FreeBSD based Unix system.

      This stress-ng tool can be installed via ports as shown.

      # cd /usr/ports/sysutils/stress/
      # make install clean
      # pkg install sysutils/stress
  3. JLockard says:

    Just a tiny annoyance…

    It’s “Spawn”, not “Spwan”

  4. Colin King says:

    The article states: “It is highly recommended that you use these tools with root user privileges”. The manual does not recommend this:

    Running stress-ng with root privileges will adjust out of memory set‐
    tings on Linux systems to make the stressors unkillable in low memory
    situations, so use this judiciously. With the appropriate privilege,
    stress-ng can allow the ionice class and ionice levels to be adjusted,
    again, this should be used with care.

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