Update cpu docs to latest style (#6411)
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Daniel Nelson
GitHub
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# Telegraf plugin: CPU
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# CPU Input Plugin
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#### Plugin arguments:
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- **totalcpu** boolean: If true, include `cpu-total` data
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- **percpu** boolean: If true, include data on a per-cpu basis `cpu0, cpu1, etc.`
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The `cpu` plugin gather metrics on the system CPUs.
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##### Configuration:
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```
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#### Configuration
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```toml
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[[inputs.cpu]]
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## Whether to report per-cpu stats or not
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percpu = true
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@ -18,82 +15,53 @@
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report_active = false
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```
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#### Description
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### Metrics
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The CPU plugin collects standard CPU metrics as defined in `man proc`. All
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architectures do not support all of these metrics.
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On Linux, consult `man proc` for details on the meanings of these values.
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- cpu
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- tags:
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- cpu (CPU ID or `cpu-total`)
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- fields:
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- time_user (float)
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- time_system (float)
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- time_idle (float)
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- time_active (float)
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- time_nice (float)
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- time_iowait (float)
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- time_irq (float)
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- time_softirq (float)
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- time_steal (float)
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- time_guest (float)
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- time_guest_nice (float)
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- usage_user (float, percent)
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- usage_system (float, percent)
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- usage_idle (float, percent)
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- usage_active (float)
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- usage_nice (float, percent)
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- usage_iowait (float, percent)
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- usage_irq (float, percent)
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- usage_softirq (float, percent)
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- usage_steal (float, percent)
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- usage_guest (float, percent)
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- usage_guest_nice (float, percent)
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### Troubleshooting
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On Linux systems the `/proc/stat` file is used to gather CPU times.
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Percentages are based on the last 2 samples.
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### Example Output
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```
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cpu 3357 0 4313 1362393
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The amount of time, measured in units of USER_HZ (1/100ths of a second on
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most architectures, use sysconf(_SC_CLK_TCK) to obtain the right value),
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that the system spent in various states:
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user (1) Time spent in user mode.
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nice (2) Time spent in user mode with low priority (nice).
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system (3) Time spent in system mode.
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idle (4) Time spent in the idle task. This value should be USER_HZ times
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the second entry in the /proc/uptime pseudo-file.
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iowait (since Linux 2.5.41)
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(5) Time waiting for I/O to complete.
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irq (since Linux 2.6.0-test4)
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(6) Time servicing interrupts.
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softirq (since Linux 2.6.0-test4)
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(7) Time servicing softirqs.
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steal (since Linux 2.6.11)
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(8) Stolen time, which is the time spent in other operating systems
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when running in a virtualized environment
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guest (since Linux 2.6.24)
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(9) Time spent running a virtual CPU for guest operating systems
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under the control of the Linux kernel.
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guest_nice (since Linux 2.6.33)
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(10) Time spent running a niced guest (virtual CPU for guest operating systems under the control of the Linux kernel).
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cpu,cpu=cpu0,host=loaner time_active=202224.15999999992,time_guest=30250.35,time_guest_nice=0,time_idle=1527035.04,time_iowait=1352,time_irq=0,time_nice=169.28,time_softirq=6281.4,time_steal=0,time_system=40097.14,time_user=154324.34 1568760922000000000
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cpu,cpu=cpu0,host=loaner usage_active=31.249999981810106,usage_guest=2.083333333080696,usage_guest_nice=0,usage_idle=68.7500000181899,usage_iowait=0,usage_irq=0,usage_nice=0,usage_softirq=0,usage_steal=0,usage_system=4.166666666161392,usage_user=25.000000002273737 1568760922000000000
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cpu,cpu=cpu1,host=loaner time_active=201890.02000000002,time_guest=30508.41,time_guest_nice=0,time_idle=264641.18,time_iowait=210.44,time_irq=0,time_nice=181.75,time_softirq=4537.88,time_steal=0,time_system=39480.7,time_user=157479.25 1568760922000000000
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cpu,cpu=cpu1,host=loaner usage_active=12.500000010610771,usage_guest=2.0833333328280585,usage_guest_nice=0,usage_idle=87.49999998938922,usage_iowait=0,usage_irq=0,usage_nice=0,usage_softirq=2.0833333332070145,usage_steal=0,usage_system=4.166666665656117,usage_user=4.166666666414029 1568760922000000000
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cpu,cpu=cpu2,host=loaner time_active=201382.78999999998,time_guest=30325.8,time_guest_nice=0,time_idle=264686.63,time_iowait=202.77,time_irq=0,time_nice=162.81,time_softirq=3378.34,time_steal=0,time_system=39270.59,time_user=158368.28 1568760922000000000
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cpu,cpu=cpu2,host=loaner usage_active=15.999999993480742,usage_guest=1.9999999999126885,usage_guest_nice=0,usage_idle=84.00000000651926,usage_iowait=0,usage_irq=0,usage_nice=0,usage_softirq=2.0000000002764864,usage_steal=0,usage_system=3.999999999825377,usage_user=7.999999998923158 1568760922000000000
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cpu,cpu=cpu3,host=loaner time_active=198953.51000000007,time_guest=30344.43,time_guest_nice=0,time_idle=265504.09,time_iowait=187.64,time_irq=0,time_nice=197.47,time_softirq=2301.47,time_steal=0,time_system=39313.73,time_user=156953.2 1568760922000000000
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cpu,cpu=cpu3,host=loaner usage_active=10.41666667424579,usage_guest=0,usage_guest_nice=0,usage_idle=89.58333332575421,usage_iowait=0,usage_irq=0,usage_nice=0,usage_softirq=0,usage_steal=0,usage_system=4.166666666666667,usage_user=6.249999998484175 1568760922000000000
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cpu,cpu=cpu-total,host=loaner time_active=804450.5299999998,time_guest=121429,time_guest_nice=0,time_idle=2321866.96,time_iowait=1952.86,time_irq=0,time_nice=711.32,time_softirq=16499.1,time_steal=0,time_system=158162.17,time_user=627125.08 1568760922000000000
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cpu,cpu=cpu-total,host=loaner usage_active=17.616580305880305,usage_guest=1.036269430422946,usage_guest_nice=0,usage_idle=82.3834196941197,usage_iowait=0,usage_irq=0,usage_nice=0,usage_softirq=1.0362694300459534,usage_steal=0,usage_system=4.145077721691784,usage_user=11.398963731636465 1568760922000000000
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```
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# Measurements:
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### CPU Time measurements:
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Meta:
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- units: CPU Time
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- tags: `cpu=<cpuN> or <cpu-total>`
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Measurement names:
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- cpu_time_user
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- cpu_time_system
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- cpu_time_idle
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- cpu_time_active (must be explicitly enabled by setting `report_active = true`)
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- cpu_time_nice
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- cpu_time_iowait
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- cpu_time_irq
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- cpu_time_softirq
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- cpu_time_steal
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- cpu_time_guest
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- cpu_time_guest_nice
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### CPU Usage Percent Measurements:
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Meta:
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- units: percent (out of 100)
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- tags: `cpu=<cpuN> or <cpu-total>`
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Measurement names:
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- cpu_usage_user
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- cpu_usage_system
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- cpu_usage_idle
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- cpu_usage_active (must be explicitly enabled by setting `report_active = true`)
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- cpu_usage_nice
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- cpu_usage_iowait
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- cpu_usage_irq
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- cpu_usage_softirq
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- cpu_usage_steal
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- cpu_usage_guest
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- cpu_usage_guest_nice
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