From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966464AbcKXTzg (ORCPT ); Thu, 24 Nov 2016 14:55:36 -0500 Received: from terminus.zytor.com ([198.137.202.10]:46758 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934137AbcKXTyW (ORCPT ); Thu, 24 Nov 2016 14:54:22 -0500 Date: Thu, 24 Nov 2016 11:53:51 -0800 From: tip-bot for Tim Chen Message-ID: Cc: linux-kernel@vger.kernel.org, tim.c.chen@linux.intel.com, mingo@kernel.org, peterz@infradead.org, srinivas.pandruvada@linux.intel.com, tglx@linutronix.de, hpa@zytor.com Reply-To: mingo@kernel.org, tim.c.chen@linux.intel.com, linux-kernel@vger.kernel.org, hpa@zytor.com, tglx@linutronix.de, peterz@infradead.org, srinivas.pandruvada@linux.intel.com In-Reply-To: <9bbb885bedbef4eb50e197305eb16b160cff0831.1479844244.git.tim.c.chen@linux.intel.com> References: <9bbb885bedbef4eb50e197305eb16b160cff0831.1479844244.git.tim.c.chen@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/core] x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU Git-Commit-ID: d3d37d850d1d77bd66bceb8326e6353d3314b270 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: d3d37d850d1d77bd66bceb8326e6353d3314b270 Gitweb: http://git.kernel.org/tip/d3d37d850d1d77bd66bceb8326e6353d3314b270 Author: Tim Chen AuthorDate: Tue, 22 Nov 2016 12:23:57 -0800 Committer: Thomas Gleixner CommitDate: Thu, 24 Nov 2016 20:44:20 +0100 x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU Some Intel cores in a package can be boosted to a higher turbo frequency with ITMT 3.0 technology. The scheduler can use the asymmetric packing feature to move tasks to the more capable cores. If ITMT is enabled, add SD_ASYM_PACKING flag to the thread and core sched domains to enable asymmetric packing. Co-developed-by: Peter Zijlstra (Intel) Signed-off-by: Tim Chen Cc: linux-pm@vger.kernel.org Cc: peterz@infradead.org Cc: jolsa@redhat.com Cc: rjw@rjwysocki.net Cc: linux-acpi@vger.kernel.org Cc: Srinivas Pandruvada Cc: bp@suse.de Link: http://lkml.kernel.org/r/9bbb885bedbef4eb50e197305eb16b160cff0831.1479844244.git.tim.c.chen@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/smpboot.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index ac61ee7..4f13062 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -482,22 +482,42 @@ static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o) return false; } +#if defined(CONFIG_SCHED_SMT) || defined(CONFIG_SCHED_MC) +static inline int x86_sched_itmt_flags(void) +{ + return sysctl_sched_itmt_enabled ? SD_ASYM_PACKING : 0; +} + +#ifdef CONFIG_SCHED_MC +static int x86_core_flags(void) +{ + return cpu_core_flags() | x86_sched_itmt_flags(); +} +#endif +#ifdef CONFIG_SCHED_SMT +static int x86_smt_flags(void) +{ + return cpu_smt_flags() | x86_sched_itmt_flags(); +} +#endif +#endif + static struct sched_domain_topology_level x86_numa_in_package_topology[] = { #ifdef CONFIG_SCHED_SMT - { cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) }, + { cpu_smt_mask, x86_smt_flags, SD_INIT_NAME(SMT) }, #endif #ifdef CONFIG_SCHED_MC - { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, + { cpu_coregroup_mask, x86_core_flags, SD_INIT_NAME(MC) }, #endif { NULL, }, }; static struct sched_domain_topology_level x86_topology[] = { #ifdef CONFIG_SCHED_SMT - { cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) }, + { cpu_smt_mask, x86_smt_flags, SD_INIT_NAME(SMT) }, #endif #ifdef CONFIG_SCHED_MC - { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, + { cpu_coregroup_mask, x86_core_flags, SD_INIT_NAME(MC) }, #endif { cpu_cpu_mask, SD_INIT_NAME(DIE) }, { NULL, },