Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende Überarbeitung | ||
embedded_systems:ethercat:test_and_tune_rt [2018-12-14 15:03] – mgehrig2 | embedded_systems:ethercat:test_and_tune_rt [2023-04-11 11:12] (aktuell) – Urs Graf | ||
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'' | '' | ||
- | See [[embedded_systems: | + | If the master cannot guarantee a stable clock, the masterShift mode is recommended. |
+ | |||
+ | See [[embedded_systems: | ||
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==== Cyclictest ==== | ==== Cyclictest ==== | ||
The Cyclictest is a software that can be used to easily measure the maximum jitter of a system. | The Cyclictest is a software that can be used to easily measure the maximum jitter of a system. | ||
- | [[software: | + | [[software: |
=== Quick Measurement === | === Quick Measurement === | ||
'' | '' | ||
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ATTENTION: If the CPU is fixed at a high temperature, | ATTENTION: If the CPU is fixed at a high temperature, | ||
- | The frequency is controlled by the OS by a scaling governor. | + | The frequency is controlled by the OS by a [[https:// |
+ | The '' | ||
+ | To get the current active governor:\\ | ||
+ | '' | ||
+ | |||
+ | To set the governor:\\ | ||
+ | '' | ||
+ | |||
+ | ==== Intel cstates ==== | ||
+ | Intel cstates indicate the power saving state of the processor. | ||
+ | These states can be locked with kernel parameters on the C0 state (no power saving measures). | ||
+ | |||
+ | {{: | ||
+ | |||
+ | Display current kernel parameters: | ||
+ | '' | ||
+ | |||
+ | Add the following [[software: | ||
+ | |||
+ | * cpuidle.off=1 | ||
+ | * intel_idle.max_cstate=0 | ||
+ | |||
+ | |||