From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932854Ab2IUSef (ORCPT ); Fri, 21 Sep 2012 14:34:35 -0400 Received: from service87.mimecast.com ([91.220.42.44]:36807 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757543Ab2IUSc3 (ORCPT ); Fri, 21 Sep 2012 14:32:29 -0400 From: morten.rasmussen@arm.com To: paulmck@linux.vnet.ibm.com, pjt@google.com, peterz@infradead.org, suresh.b.siddha@intel.com Cc: morten.rasmussen@arm.com, linaro-sched-sig@lists.linaro.org, linaro-dev@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 05/10] ARM: Add HMP scheduling support for ARM architecture Date: Fri, 21 Sep 2012 19:32:20 +0100 Message-Id: <1348252345-5642-6-git-send-email-morten.rasmussen@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348252345-5642-1-git-send-email-morten.rasmussen@arm.com> References: <1348252345-5642-1-git-send-email-morten.rasmussen@arm.com> X-OriginalArrivalTime: 21 Sep 2012 18:32:25.0601 (UTC) FILETIME=[7283F710:01CD9827] X-MC-Unique: 112092119322705401 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id q8LIZBCU011376 From: Morten Rasmussen Adds Kconfig entries to enable HMP scheduling on ARM platforms. Currently, it disables CPU level sched_domain load-balacing in order to simplify things. This needs fixing in a later revision. HMP scheduling will do the load-balancing at this level instead. Signed-off-by: Morten Rasmussen --- arch/arm/Kconfig | 14 ++++++++++++++ arch/arm/include/asm/topology.h | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 05de193..cb80846 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1584,6 +1584,20 @@ config SCHED_HMP_PRIO_FILTER_VAL default 5 depends on SCHED_HMP_PRIO_FILTER +config HMP_FAST_CPU_MASK + string "HMP scheduler fast CPU mask" + depends on SCHED_HMP + help + Specify the cpuids of the fast CPUs in the system as a list string, + e.g. cpuid 0+1 should be specified as 0-1. + +config HMP_SLOW_CPU_MASK + string "HMP scheduler slow CPU mask" + depends on SCHED_HMP + help + Specify the cpuids of the slow CPUs in the system as a list string, + e.g. cpuid 0+1 should be specified as 0-1. + config HAVE_ARM_SCU bool help diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h index 58b8b84..13a03de 100644 --- a/arch/arm/include/asm/topology.h +++ b/arch/arm/include/asm/topology.h @@ -27,6 +27,38 @@ void init_cpu_topology(void); void store_cpu_topology(unsigned int cpuid); const struct cpumask *cpu_coregroup_mask(int cpu); +#ifdef CONFIG_DISABLE_CPU_SCHED_DOMAIN_BALANCE +/* Common values for CPUs */ +#ifndef SD_CPU_INIT +#define SD_CPU_INIT (struct sched_domain) { \ + .min_interval = 1, \ + .max_interval = 4, \ + .busy_factor = 64, \ + .imbalance_pct = 125, \ + .cache_nice_tries = 1, \ + .busy_idx = 2, \ + .idle_idx = 1, \ + .newidle_idx = 0, \ + .wake_idx = 0, \ + .forkexec_idx = 0, \ + \ + .flags = 0*SD_LOAD_BALANCE \ + | 1*SD_BALANCE_NEWIDLE \ + | 1*SD_BALANCE_EXEC \ + | 1*SD_BALANCE_FORK \ + | 0*SD_BALANCE_WAKE \ + | 1*SD_WAKE_AFFINE \ + | 0*SD_PREFER_LOCAL \ + | 0*SD_SHARE_CPUPOWER \ + | 0*SD_SHARE_PKG_RESOURCES \ + | 0*SD_SERIALIZE \ + , \ + .last_balance = jiffies, \ + .balance_interval = 1, \ +} +#endif +#endif /* CONFIG_DISABLE_CPU_SCHED_DOMAIN_BALANCE */ + #else static inline void init_cpu_topology(void) { } -- 1.7.9.5