From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: [PATCH v4 07/10] x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU Date: Wed, 21 Sep 2016 12:19:09 -0700 Message-ID: <1474485552-141429-8-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1474485552-141429-1-git-send-email-srinivas.pandruvada@linux.intel.com> Return-path: Received: from mga05.intel.com ([192.55.52.43]:12677 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S940192AbcIUTT0 (ORCPT ); Wed, 21 Sep 2016 15:19:26 -0400 In-Reply-To: <1474485552-141429-1-git-send-email-srinivas.pandruvada@linux.intel.com> 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, jolsa@redhat.com, Srinivas Pandruvada From: Tim Chen 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. Signed-off-by: Tim Chen Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Srinivas Pandruvada --- arch/x86/kernel/smpboot.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 38901b3..46815e6 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -487,22 +487,41 @@ static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o) return false; } +#ifndef CONFIG_SCHED_ITMT +#define sysctl_sched_itmt_enabled 0 +#endif + +static inline int x86_sched_itmt_flags(void) +{ + return sysctl_sched_itmt_enabled ? SD_ASYM_PACKING : 0; +} + +static int x86_core_flags(void) +{ + return cpu_core_flags() | x86_sched_itmt_flags(); +} + +static int x86_smt_flags(void) +{ + return cpu_smt_flags() | x86_sched_itmt_flags(); +} + 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, }, -- 2.7.4