From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <david.hunt@intel.com> Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 3C4A35689 for <dev@dpdk.org>; Tue, 15 Jan 2019 15:17:11 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Jan 2019 06:17:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,481,1539673200"; d="scan'208";a="126221602" Received: from silpixa00399952.ir.intel.com (HELO silpixa00399952.ger.corp.intel.com) ([10.237.223.64]) by orsmga002.jf.intel.com with ESMTP; 15 Jan 2019 06:17:09 -0800 From: David Hunt <david.hunt@intel.com> To: dev@dpdk.org Cc: david.hunt@intel.com, john.mcnamara@intel.com, marko.kovacevic@intel.com Date: Tue, 15 Jan 2019 14:17:00 +0000 Message-Id: <20190115141701.53956-1-david.hunt@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [dpdk-dev] [PATCH 1/2] doc/power: library can now use intel-pstate X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> X-List-Received-Date: Tue, 15 Jan 2019 14:17:12 -0000 With the addition of the patchset to allow auto-detection and use of the intel_pstate kernel driver instead of the acpi-cpufreq kernel driver, we need to reflect this in the documentation. Now, instead of telling the user to disable intel_pstate in all cases, it is now an optional step, should the user want to use acpi-cpufreq. Signed-off-by: David Hunt <david.hunt@intel.com> --- doc/guides/sample_app_ug/vm_power_management.rst | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/doc/guides/sample_app_ug/vm_power_management.rst b/doc/guides/sample_app_ug/vm_power_management.rst index 5be9f24d5..14d432e78 100644 --- a/doc/guides/sample_app_ug/vm_power_management.rst +++ b/doc/guides/sample_app_ug/vm_power_management.rst @@ -131,10 +131,15 @@ can be accessed. Host Operating System ~~~~~~~~~~~~~~~~~~~~~ -The Host OS must also have the *apci_cpufreq* module installed, in some cases -the *intel_pstate* driver may be the default Power Management environment. -To enable *acpi_cpufreq* and disable *intel_pstate*, add the following -to the grub Linux command line: +The DPDK Power Library can use either the *acpi_cpufreq* or *intel_pstate* +kernel driver for the management of core frequencies. In many cases +the *intel_pstate* driver is the default Power Management environment. + +Should the *acpi-cpufreq* driver be required, the *intel_pstate* module must +be disabled, and *apci_cpufreq* module loaded in its place. + +To disable *intel_pstate* driver, add the following to the grub Linux +command line: .. code-block:: console -- 2.17.1