From: David Hunt Date: Wed, 24 Nov 2021 16:53:00 +0000 (+0000) Subject: doc: add power management scale mode reaction time note X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=7580f97338a448f9d46f9ef1aeb1e30369cc3bf7;p=dpdk.git doc: add power management scale mode reaction time note When using PMD Power Management, scale mode reacts slower than monitor mode and pause mode. Add note in user guide to this effect. Signed-off-by: David Hunt --- diff --git a/doc/guides/prog_guide/power_man.rst b/doc/guides/prog_guide/power_man.rst index e387d7811e..4484a94dc8 100644 --- a/doc/guides/prog_guide/power_man.rst +++ b/doc/guides/prog_guide/power_man.rst @@ -217,6 +217,8 @@ power saving whenever empty poll count reaches a certain number. * Frequency scaling This power saving scheme will use ``librte_power`` library functionality to scale the core frequency up/down depending on traffic volume. + The reaction time of the frequency scaling mode is longer + than the pause and monitor mode. The "monitor" mode is only supported in the following configurations and scenarios: diff --git a/doc/guides/sample_app_ug/l3_forward_power_man.rst b/doc/guides/sample_app_ug/l3_forward_power_man.rst index 8817eaadbf..2e350c45f1 100644 --- a/doc/guides/sample_app_ug/l3_forward_power_man.rst +++ b/doc/guides/sample_app_ug/l3_forward_power_man.rst @@ -347,6 +347,8 @@ and has three available power management schemes: ``scale`` This will use frequency scaling routines available in the ``librte_power`` library. + The reaction time of the scale mode is longer + than the pause and monitor mode. See :doc:`Power Management<../prog_guide/power_man>` chapter in the DPDK Programmer's Guide for more details on PMD power management.