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From: David Hunt <david.hunt@intel.com>
To: dev@dpdk.org
Cc: david.hunt@intel.com
Subject: [dpdk-dev] [PATCH v1 1/3] doc/distributor: add SST-BF enhancement info
Date: Thu,  2 May 2019 12:18:13 +0100	[thread overview]
Message-ID: <20190502111815.29343-1-david.hunt@intel.com> (raw)
Message-ID: <20190502111813.vwLDW1Ax_Jd0pnZCieWb1GOK96uiIP_JKl1ImgAtWLU@z> (raw)

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(-)

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
 ---------------------
 
-- 
2.17.1


             reply	other threads:[~2019-05-02 11:18 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-02 11:18 David Hunt [this message]
2019-05-02 11:18 ` David Hunt
2019-05-02 11:18 ` [dpdk-dev] [PATCH v1 2/3] doc: add release note for power changes David Hunt
2019-05-02 11:18   ` David Hunt
2019-05-02 15:55   ` Mcnamara, John
2019-05-02 15:55     ` Mcnamara, John
2019-05-03 20:17     ` Thomas Monjalon
2019-05-03 20:17       ` Thomas Monjalon
2019-05-02 11:18 ` [dpdk-dev] [PATCH v1 3/3] lib/power: clarify comment on priority core David Hunt
2019-05-02 11:18   ` David Hunt
2019-05-02 16:14   ` Mcnamara, John
2019-05-02 16:14     ` Mcnamara, John
2019-05-02 15:53 ` [dpdk-dev] [PATCH v1 1/3] doc/distributor: add SST-BF enhancement info Mcnamara, John
2019-05-02 15:53   ` Mcnamara, John

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