doc/power: add info on scale mode reaction time
PATCH 1/1 doc/power: add info on scale mode reaction time
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 <[email protected]>
--- doc/guides/prog_guide/power_man.rst | 4 +++- doc/guides/sample_app_ug/l3_forward_power_man.rst | 5 +++-- 2 files changed, 6 insertions(+), 3 deletions(-)
doc/guides/prog_guide/power_man.rst +3 -1
@@ -216,7 +216,9 @@ 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. + 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:
doc/guides/sample_app_ug/l3_forward_power_man.rst +3 -2
@@ -345,8 +345,9 @@ and has three available power management schemes: to avoid busy looping when there is no traffic. ``scale`` - This will use frequency scaling routines - available in the ``librte_power`` library. + 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.
Signature · 1 line
2.17.1
Thomas Monjalon
Applied24/11/2021 17:53, David Hunt:
Quoted 11 lines
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 <[email protected]>---
This power saving scheme will use ``librte_power`` library functionality todoc/guides/prog_guide/power_man.rst +3
-1- scale the core frequency up/down depending on traffic volume. + 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.
[...]
doc/guides/sample_app_ug/l3_forward_power_man.rst and has three available power management schemes: · line 350
Quoted 5 lines
doc/guides/sample_app_ug/l3_forward_power_man.rst +3
-2- This will use frequency scaling routines - available in the ``librte_power`` library. + 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.
You don't have to change existing lines to add a new sentence. That's why I recommend always starting a new sentence on a new line. I fixed it to make the patch cleaner.
Applied