diff mbox series

[v1,1/3] doc/distributor: add SST-BF enhancement info

Message ID 20190502111815.29343-1-david.hunt@intel.com (mailing list archive)
State Accepted, archived
Headers
Series [v1,1/3] doc/distributor: add SST-BF enhancement info |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/intel-Performance-Testing success Performance Testing PASS
ci/mellanox-Performance-Testing success Performance Testing PASS
ci/Intel-compilation fail apply issues

Commit Message

Hunt, David May 2, 2019, 11:18 a.m. UTC 
  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@intel.com>
---
 doc/guides/sample_app_ug/dist_app.rst | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

Comments

John McNamara May 2, 2019, 3:53 p.m. UTC | #1 
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of David Hunt
> Sent: Thursday, May 2, 2019 12:18 PM
> To: dev@dpdk.org
> Cc: Hunt, David <david.hunt@intel.com>
> Subject: [dpdk-dev] [PATCH v1 1/3] doc/distributor: add SST-BF enhancement
> info
> 
> 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.

Acked-by: John McNamara <john.mcnamara@intel.com>
diff mbox series

Patch

diff --git a/doc/guides/sample_app_ug/dist_app.rst b/doc/guides/sample_app_ug/dist_app.rst
index abfdd2c5e..90270e3a5 100644
--- a/doc/guides/sample_app_ug/dist_app.rst
+++ b/doc/guides/sample_app_ug/dist_app.rst
@@ -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.
 
 Overview
 --------
@@ -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
 ---------------------