[dpdk-dev] [PATCH v1 1/3] doc/distributor: add SST-BF enhancement info
david.hunt at intel.com
Thu May 2 13:18:13 CEST 2019
The distributor sample application has been enhanced to be aware of
Intel SST-BF high frequency cores. Docs also contain a link to
the Intel SST-BF application note.
Signed-off-by: David Hunt <david.hunt at intel.com>
doc/guides/sample_app_ug/dist_app.rst | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/doc/guides/sample_app_ug/dist_app.rst b/doc/guides/sample_app_ug/dist_app.rst
index abfdd2c5e..90270e3a5 100644
@@ -5,7 +5,9 @@ Distributor Sample Application
The distributor sample application is a simple example of packet distribution
-to cores using the Data Plane Development Kit (DPDK).
+to cores using the Data Plane Development Kit (DPDK). It also makes use of
+Intel Speed Select Technology - Base Frequency (Intel SST-BF) to pin the
+distributor to the higher frequency core if available.
@@ -101,6 +103,22 @@ final statistics to the user.
Distributor Sample Application Layout
+Intel SST-BF Support
+In DPDK 19.05, support was added to the power management library for
+Intel-SST-BF, a technology that allows some cores to run at a higher
+frequency than others. An application note for Intel SST-BF is available,
+and is entitled
+`Intel Speed Select Technology – Base Frequency - Enhancing Performance <https://builders.intel.com/docs/networkbuilders/intel-speed-select-technology-base-frequency-enhancing-performance.pdf>`_
+The distributor application was also enhanced to be aware of these higher
+frequency SST-BF cores, and when starting the application, if high frequency
+SST-BF cores are present in the core mask, the application will identify these
+cores and pin the workloads appropriately. The distributor core is usually
+the bottleneck, so this is given first choice of the high frequency SST-BF
+cores, followed by the rx core and the tx core.
Debug Logging Support
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