- 22 11月, 2016 1 次提交
-
-
由 Juri Lelli 提交于
With the introduction of cpu capacity-dmips-mhz bindings, CPU capacities can now be calculated from values extracted from DT and information coming from cpufreq. Add parsing of DT information at boot time, and complement it with cpufreq information. We keep code that can produce same information, based on different DT properties and hard-coded values, as fall-back for backward compatibility. Caveat: the information provided by this patch will start to be used in the future. We need to #define arch_scale_cpu_capacity to something provided in arch, so that scheduler's default implementation (which gets used if arch_scale_cpu_capacity is not defined) is overwritten. Signed-off-by: NJuri Lelli <juri.lelli@arm.com> Acked-by: NVincent Guittot <vincent.guittot@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 27 1月, 2016 1 次提交
-
-
由 Juri Lelli 提交于
Instead of looping through all cpus calling set_capacity_scale, we can initialise cpu_scale per-cpu variables to SCHED_CAPACITY_SCALE with their definition. Acked-by: NVincent Guittot <vincent.guittot@linaro.org> Signed-off-by: NJuri Lelli <juri.lelli@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 21 11月, 2014 1 次提交
-
-
由 Russell King 提交于
Convert many (but not all) printk(KERN_* to pr_* to simplify the code. We take the opportunity to join some printk lines together so we don't split the message across several lines, and we also add a few levels to some messages which were previously missing them. Tested-by: NAndrew Lunn <andrew@lunn.ch> Tested-by: NFelipe Balbi <balbi@ti.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 19 9月, 2014 1 次提交
-
-
由 Vincent Guittot 提交于
Use the new arch_scale_cpu_capacity() scheduler facility in order to reflect the original capacity of a CPU instead of arch_scale_freq_capacity() which is more linked to a scaling of the capacity linked to the frequency. Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Acked-by: NNicolas Pitre <nico@linaro.org> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: preeti@linux.vnet.ibm.com Cc: riel@redhat.com Cc: Morten.Rasmussen@arm.com Cc: efault@gmx.de Cc: daniel.lezcano@linaro.org Cc: dietmar.eggemann@arm.com Cc: Grant Likely <grant.likely@linaro.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Brown <broonie@linaro.org> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1409051215-16788-6-git-send-email-vincent.guittot@linaro.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
-
- 02 7月, 2014 1 次提交
-
-
由 Guenter Roeck 提交于
Commit 143e1e28 (sched: Rework sched_domain topology definition) introduced a number of functions with a return value of 'const int'. gcc doesn't know what to do with that and, if the kernel is compiled with W=1, complains with the following warnings whenever sched.h is included. include/linux/sched.h:875:25: warning: type qualifiers ignored on function return type include/linux/sched.h:882:25: warning: type qualifiers ignored on function return type include/linux/sched.h:889:25: warning: type qualifiers ignored on function return type include/linux/sched.h:1002:21: warning: type qualifiers ignored on function return type Commits fb2aa855 (sched, ARM: Create a dedicated scheduler topology table) and 607b45e9 (sched, powerpc: Create a dedicated topology table) introduce the same warning in the arm and powerpc code. Drop 'const' from the function declarations to fix the problem. The fix for all three patches has to be applied together to avoid compilation failures for the affected architectures. Acked-by: NVincent Guittot <vincent.guittot@linaro.org> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NGuenter Roeck <linux@roeck-us.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Mackerras <paulus@samba.org> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1403658329-13196-1-git-send-email-linux@roeck-us.netSigned-off-by: NIngo Molnar <mingo@kernel.org>
-
- 05 6月, 2014 1 次提交
-
-
由 Nicolas Pitre 提交于
It is better not to think about compute capacity as being equivalent to "CPU power". The upcoming "power aware" scheduler work may create confusion with the notion of energy consumption if "power" is used too liberally. This contains the architecture visible changes. Incidentally, only ARM takes advantage of the available pow^H^H^Hcapacity scaling hooks and therefore those changes outside kernel/sched/ are confined to one ARM specific file. The default arch_scale_smt_power() hook is not overridden by anyone. Replacements are as follows: arch_scale_freq_power --> arch_scale_freq_capacity arch_scale_smt_power --> arch_scale_smt_capacity SCHED_POWER_SCALE --> SCHED_CAPACITY_SCALE SCHED_POWER_SHIFT --> SCHED_CAPACITY_SHIFT The local usage of "power" in arch/arm/kernel/topology.c is also changed to "capacity" as appropriate. Signed-off-by: NNicolas Pitre <nico@linaro.org> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Morten Rasmussen <morten.rasmussen@arm.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linaro-kernel@lists.linaro.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Brown <broonie@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/n/tip-48zba9qbznvglwelgq2cfygh@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
-
- 07 5月, 2014 1 次提交
-
-
由 Vincent Guittot 提交于
Create a dedicated topology table for ARM which will create new level to differentiate CPUs that can or not powergate independantly from others. The patch gives an example of how to add domain that will take advantage of SD_SHARE_POWERDOMAIN. Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Reviewed-by: NDietmar Eggemann <dietmar.eggemann@arm.com> Tested-by: NDietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: NPeter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Grant Likely <grant.likely@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Brown <broonie@linaro.org> Cc: Nicolas Pitre <nico@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com Cc: schwidefsky@de.ibm.com Cc: cmetcalf@tilera.com Cc: benh@kernel.crashing.org Cc: preeti@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1397209481-28542-6-git-send-email-vincent.guittot@linaro.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
-
- 15 4月, 2014 1 次提交
-
-
由 Mark Brown 提交于
Use kcalloc() and ULONG_MAX rather than open coding them. Signed-off-by: NMark Brown <broonie@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 29 12月, 2013 1 次提交
-
-
由 Mark Brown 提交于
These symbols are only referenced in this source file so can be made static, and the efficiency table is constant data so can be declared as such. This avoids polluting the global namespace and fixes warnings from sparse. The function arch_scale_freq_power() is still not prototyped or static, this is a separate issue as this is overriding a weak symbol from the scheduler which neglects to provide a prototype. Signed-off-by: NMark Brown <broonie@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 21 8月, 2013 1 次提交
-
-
由 Sudeep KarkadaNagesha 提交于
Currently the topology code computes cpu capacity and stores it in the list along with hwid(which is MPIDR) as it parses the CPU nodes in the device tree. This is required as it needs to be mapped to the logical CPU later. Since the CPU device nodes can be retrieved in the logical ordering using DT/OF helpers, its possible to store cpu_capacity also in logical ordering and avoid storing hwid for each entry. This patch removes hwid by making use of of_get_cpu_node. Cc: Russell King <linux@arm.linux.org.uk> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: NRob Herring <rob.herring@calxeda.com> Acked-by: NNicolas Pitre <nico@linaro.org> Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
-
- 06 6月, 2013 1 次提交
-
-
由 Arnd Bergmann 提交于
The cpu_topology symbol is required by any driver using the topology interfaces, which leads to a couple of build errors: ERROR: "cpu_topology" [drivers/net/ethernet/sfc/sfc.ko] undefined! ERROR: "cpu_topology" [drivers/cpufreq/arm_big_little.ko] undefined! ERROR: "cpu_topology" [drivers/block/mtip32xx/mtip32xx.ko] undefined! The obvious solution is to export this symbol. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NWill Deacon <will.deacon@arm.com> Cc: stable@vger.kernel.org Cc: Nicolas Pitre <nico@linaro.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 18 3月, 2013 1 次提交
-
-
由 Zhang Yanfei 提交于
remove cast for kzalloc return value. Signed-off-by: NZhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: NJiri Kosina <jkosina@suse.cz>
-
- 19 11月, 2012 2 次提交
-
-
由 Lorenzo Pieralisi 提交于
This patch updates the topology initialization code to use the newly defined accessors to retrieve the MPIDR affinity levels. Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: NWill Deacon <will.deacon@arm.com> Acked-by: NNicolas Pitre <nico@linaro.org>
-
由 Lorenzo Pieralisi 提交于
Kernel subsystems other than the topology layer need the MPIDR mask definitions to access the MPIDR without relying on hardcoded masks. This patch moves the MPIDR register masks definition to a header file and defines a macro to simplify access to MPIDR bit fields representing affinity levels. Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: NWill Deacon <will.deacon@arm.com> Acked-by: NNicolas Pitre <nico@linaro.org>
-
- 11 8月, 2012 1 次提交
-
-
Get rid of this warning.. arch/arm/kernel/built-in.o(.text+0xac78): Section mismatch in reference from the function init_cpu_topology() to the function .init.text:parse_dt_topology() The function init_cpu_topology() references the function __init parse_dt_topology(). This is often because init_cpu_topology lacks a __init annotation or the annotation of parse_dt_topology is wrong. Signed-off-by: NVenkatraman S <svenkatr@ti.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 13 7月, 2012 3 次提交
-
-
由 Vincent Guittot 提交于
Use cpu compatibility field and clock-frequency field of DT to estimate the capacity of each core of the system and to update the cpu_power field accordingly. This patch enables to put more running tasks on big cores than on LITTLE ones. But this patch doesn't ensure that long running tasks will run on big cores and short ones on LITTLE cores. Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Reviewed-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Vincent Guittot 提交于
This factorization has also been proposed in another patch that has not been merged yet: http://lists.infradead.org/pipermail/linux-arm-kernel/2012-January/080873.html So, this patch could be dropped depending of the state of the other one. Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Reviewed-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
由 Vincent Guittot 提交于
Add infrastructure to be able to modify the cpu_power of each core Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Reviewed-by: NNamhyung Kim <namhyung@kernel.org> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 01 12月, 2011 1 次提交
-
-
由 Vincent Guittot 提交于
kernel/sched.c:7354:2: warning: initialization from incompatible pointer type Align cpu_coregroup_mask prototype interface with sched_domain_mask_f typedef use int cpu instead of unsigned int cpu Cc: <stable@vger.kernel.org> Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-
- 17 10月, 2011 1 次提交
-
-
由 Vincent Guittot 提交于
The affinity between ARM processors is defined in the MPIDR register. We can identify which processors are in the same cluster, and which ones have performance interdependency. We can define the cpu topology of ARM platform, that is then used by sched_mc and sched_smt. The default state of sched_mc and sched_smt config is disable. When enabled, the behavior of the scheduler can be modified with sched_mc_power_savings and sched_smt_power_savings sysfs interfaces. Changes since v4 : * Remove unnecessary parentheses and blank lines Changes since v3 : * Update the format of printk message * Remove blank line Changes since v2 : * Update the commit message and some comments Changes since v1 : * Update the commit message * Add read_cpuid_mpidr in arch/arm/include/asm/cputype.h * Modify header of arch/arm/kernel/topology.c * Modify tests and manipulation of MPIDR's bitfields * Modify the place and dependancy of the config * Modify Noop functions Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org> Reviewed-by: NAmit Kucheria <amit.kucheria@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
-