From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: =?UTF-8?q?=5BPATCH=20v3=200/8=5D=20Support=20Intel=C2=AE=20Turbo=20Boost=20Max=20Technology=203=2E0?= Date: Thu, 8 Sep 2016 15:26:47 -0700 Message-ID: <1473373615-51427-1-git-send-email-srinivas.pandruvada@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: Received: from mga06.intel.com ([134.134.136.31]:37131 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758357AbcIHW1C (ORCPT ); Thu, 8 Sep 2016 18:27:02 -0400 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de Cc: x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, peterz@infradead.org, tim.c.chen@linux.intel.com, Srinivas Pandruvada v3: - Fix race clash when more than one program are enabling/disabling ITMT - Remove group_priority_cpu macro to simplify code. - Error reported by 0-day for compile issue on ARM v2 - The patchset is split into two parts so that CPPC changes can be merged first 1. Only ACPI CPPC changes (It is posted separately) 2. ITMT changes (scheduler and Intel P-State) - Changes in patch: sched,x86: Enable Turbo Boost Max Technology 1. Use arch_update_cpu_topology to indicate need to completely rebuild sched domain when ITMT related sched domain flags change 2. Enable client (single node) platform capable of ITMT with ITMT scheduling by default 3. Implement arch_asym_cpu_priority to provide the cpu priority value to scheduler for asym packing. 4. Fix a compile bug for i386 architecture. - Changes in patch: sched: Extend scheduler's asym packing 1. Use arch_asym_cpu_priority() to provide cpu priority value used for asym packing to the scheduler. - Changes in acpi: bus: Enable HWP CPPC objects and acpi: bus: Set _OSC for diverse core support Minor code cleanup by removing #ifdef - Changes in Kconfig for Intel P-State Avoid building CPPC lib for i386 for issue reported by 0-day - Feature is enabled by default for single socket systems With Intel® Turbo Boost Max Technology 3.0 (ITMT), single-threaded performance is optimized by identifying processor's fastest core and running critical workloads on it. Refere to: http://www.intel.com/content/www/us/en/architecture-and-technology/turbo-boost/turbo-boost-max-technology.html This patchset consist of all changes required to support ITMT feature: - Use CPPC information in Intel P-State driver to get performance information - Scheduler enhancements - cppc lib patches (split in to a seprate series) This featured can be enabled by writing at runtime # echo 1 > /proc/sys/kernel/sched_itmt_enabled This featured can be disabled by writing at runtime # echo 0 > /proc/sys/kernel/sched_itmt_enabled Srinivas Pandruvada (3): acpi: bus: Enable HWP CPPC objects acpi: bus: Set _OSC for diverse core support cpufreq: intel_pstate: Use CPPC to get max performance Tim Chen (5): sched, x86: Add SD_ASYM_PACKING flags to x86 cpu topology for ITMT sched: Extend scheduler's asym packing x86, cpu: provide a function topology_num_packages to enumerate #packages sched, x86: use arch_update_cpu_topology to indicate x86 need sched domain rebuild sched,x86: Enable Turbo Boost Max Technology arch/x86/Kconfig | 9 +++ arch/x86/include/asm/topology.h | 25 ++++++ arch/x86/kernel/Makefile | 1 + arch/x86/kernel/itmt.c | 164 ++++++++++++++++++++++++++++++++++++++++ arch/x86/kernel/smpboot.c | 92 +++++++++++++++++----- drivers/acpi/bus.c | 10 +++ drivers/cpufreq/Kconfig.x86 | 1 + drivers/cpufreq/intel_pstate.c | 75 +++++++++++++++++- include/linux/acpi.h | 1 + include/linux/sched.h | 2 + kernel/sched/core.c | 21 +++++ kernel/sched/fair.c | 35 ++++++--- kernel/sched/sched.h | 6 ++ 13 files changed, 410 insertions(+), 32 deletions(-) create mode 100644 arch/x86/kernel/itmt.c -- 2.7.4