2016-03-02 15:29:19 +03:00
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.. _cpu:
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CPU
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===
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2016-03-31 13:30:14 +03:00
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The CPU stats are shown as a percentage or value and for the configured
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refresh time. The total CPU usage is displayed on the first line.
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2016-03-02 15:29:19 +03:00
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.. image:: ../_static/cpu.png
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If enough horizontal space is available, extended CPU information are
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displayed.
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.. image:: ../_static/cpu-wide.png
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2016-03-31 13:30:14 +03:00
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CPU stats description:
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* user: percent time spent in user space
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* system: percent time spent in kernel space
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* idle: percent of CPU used by any program
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* nice: percent time occupied by user level processes with a positive nice value
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* irq: percent time spent servicing/handling hardware/software interrupts
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* iowait: percent time spent in wait (on disk)
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* steal: percent time in involuntary wait by virtual cpu while hypervisor is servicing another processor/virtual machine
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* ctx_sw: number of context switches (voluntary + involuntary) per second
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* inter: number of interrupts per second
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* sw_inter: number of software interrupts per second. Always set to 0 on Windows and SunOS.
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* syscal: number of system calls per second. Do not displayed on Linux (always 0).
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2016-03-02 15:29:19 +03:00
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To switch to per-CPU stats, just hit the ``1`` key:
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.. image:: ../_static/per-cpu.png
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By default, ``steal`` CPU time alerts aren't logged. If you want that,
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just add to the configuration file:
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.. code-block:: ini
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[cpu]
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steal_log=True
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Legend:
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================= ============
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CPU (user/system) Status
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================= ============
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``<50%`` ``OK``
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``>50%`` ``CAREFUL``
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``>70%`` ``WARNING``
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``>90%`` ``CRITICAL``
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================= ============
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.. note::
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Limit values can be overwritten in the configuration file under
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the ``[cpu]`` and/or ``[percpu]`` sections.
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