X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fsample_app_ug%2Fl3_forward_power_man.rst;h=eb0c6d42f4de026ad082300be6774cb93af9a2c8;hb=71b09bd95096610aaddb69497297103a129e0e7c;hp=831f2bf58f99770b6ddf74bc85a25a85c5e0e756;hpb=db27370b57202632ad8830352c1c0ee2dde4542f;p=dpdk.git

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 831f2bf58f..eb0c6d42f4 100644
--- a/doc/guides/sample_app_ug/l3_forward_power_man.rst
+++ b/doc/guides/sample_app_ug/l3_forward_power_man.rst
@@ -49,7 +49,7 @@ to set the CPUFreq governor and set the frequency of specific cores.
 
 This application includes a P-state power management algorithm to generate a frequency hint to be sent to CPUFreq.
 The algorithm uses the number of received and available Rx packets on recent polls to make a heuristic decision to scale frequency up/down.
-Specifically, some thresholds are checked to see whether a specific core running an DPDK polling thread needs to increase frequency
+Specifically, some thresholds are checked to see whether a specific core running a DPDK polling thread needs to increase frequency
 a step up based on the near to full trend of polled Rx queues.
 Also, it decreases frequency a step if packet processed per loop is far less than the expected threshold
 or the thread's sleeping time exceeds a threshold.
@@ -109,6 +109,8 @@ where,
 
 *   --telemetry:  Telemetry mode.
 
+*   --pmd-mgmt: PMD power management mode.
+
 See :doc:`l3_forward` for details.
 The L3fwd-power example reuses the L3fwd command line options.
 
@@ -456,3 +458,44 @@ reference cycles and accordingly busy rate is set  to either 0% or
 
 The new stats ``empty_poll`` , ``full_poll`` and ``busy_percent`` can be viewed by running the script
 ``/usertools/dpdk-telemetry-client.py`` and selecting the menu option ``Send for global Metrics``.
+
+PMD power management Mode
+-------------------------
+
+The PMD power management  mode support for ``l3fwd-power`` is a standalone mode.
+In this mode, ``l3fwd-power`` does simple l3fwding
+along with enabling the power saving scheme on specific port/queue/lcore.
+Main purpose for this mode is to demonstrate
+how to use the PMD power management API.
+
+.. code-block:: console
+
+        ./build/examples/dpdk-l3fwd-power -l 1-3 --  --pmd-mgmt -p 0x0f --config="(0,0,2),(0,1,3)"
+
+PMD Power Management Mode
+-------------------------
+
+There is also a traffic-aware operating mode that,
+instead of using explicit power management,
+will use automatic PMD power management.
+This mode is limited to one queue per core,
+and has three available power management schemes:
+
+``monitor``
+  This will use ``rte_power_monitor()`` function to enter
+  a power-optimized state (subject to platform support).
+
+``pause``
+  This will use ``rte_power_pause()`` or ``rte_pause()``
+  to avoid busy looping when there is no traffic.
+
+``scale``
+  This will use frequency scaling routines
+  available in the ``librte_power`` library.
+
+See :doc:`Power Management<../prog_guide/power_man>` chapter
+in the DPDK Programmer's Guide for more details on PMD power management.
+
+.. code-block:: console
+
+        ./<build_dir>/examples/dpdk-l3fwd-power -l 1-3 -- -p 0x0f --config="(0,0,2),(0,1,3)" --pmd-mgmt=scale