From: Shawn Guo <shawn.guo@linaro.org> To: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, Kevin Hilman <khilman@ti.com>, Nishanth Menon <nm@ti.com>, Shilimkar Santosh <santosh.shilimkar@ti.com>, Richard Zhao <richard.zhao@freescale.com>, Russell King - ARM Linux <linux@arm.linux.org.uk>, Mike Turquette <mturquette@linaro.org>, Mark Brown <broonie@opensource.wolfsonmicro.com>, Rob Herring <rob.herring@calxeda.com>, devicetree-discuss@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, Richard Zhao <richard.zhao@linaro.org>, Shawn Guo <shawn.guo@linaro.org> Subject: [PATCH v3 1/3] ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp Date: Fri, 10 Aug 2012 13:37:23 +0800 [thread overview] Message-ID: <1344577046-14847-2-git-send-email-shawn.guo@linaro.org> (raw) In-Reply-To: <1344577046-14847-1-git-send-email-shawn.guo@linaro.org> From: Richard Zhao <richard.zhao@linaro.org> If CONFIG_SMP, cpufreq skips loops_per_jiffy update, because different arch has different per-cpu loops_per_jiffy definition. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> --- arch/arm/kernel/smp.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 54 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index ebd8ad2..8e03567 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -25,6 +25,7 @@ #include <linux/percpu.h> #include <linux/clockchips.h> #include <linux/completion.h> +#include <linux/cpufreq.h> #include <linux/atomic.h> #include <asm/cacheflush.h> @@ -584,3 +585,56 @@ int setup_profiling_timer(unsigned int multiplier) { return -EINVAL; } + +#ifdef CONFIG_CPU_FREQ + +static DEFINE_PER_CPU(unsigned long, l_p_j_ref); +static DEFINE_PER_CPU(unsigned long, l_p_j_ref_freq); +static unsigned long global_l_p_j_ref; +static unsigned long global_l_p_j_ref_freq; + +static int cpufreq_callback(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct cpufreq_freqs *freq = data; + int cpu = freq->cpu; + + if (freq->flags & CPUFREQ_CONST_LOOPS) + return NOTIFY_OK; + + if (!per_cpu(l_p_j_ref, cpu)) { + per_cpu(l_p_j_ref, cpu) = + per_cpu(cpu_data, cpu).loops_per_jiffy; + per_cpu(l_p_j_ref_freq, cpu) = freq->old; + if (!global_l_p_j_ref) { + global_l_p_j_ref = loops_per_jiffy; + global_l_p_j_ref_freq = freq->old; + } + } + + if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) || + (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) || + (val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) { + loops_per_jiffy = cpufreq_scale(global_l_p_j_ref, + global_l_p_j_ref_freq, + freq->new); + per_cpu(cpu_data, cpu).loops_per_jiffy = + cpufreq_scale(per_cpu(l_p_j_ref, cpu), + per_cpu(l_p_j_ref_freq, cpu), + freq->new); + } + return NOTIFY_OK; +} + +static struct notifier_block cpufreq_notifier = { + .notifier_call = cpufreq_callback, +}; + +static int __init register_cpufreq_notifier(void) +{ + return cpufreq_register_notifier(&cpufreq_notifier, + CPUFREQ_TRANSITION_NOTIFIER); +} +core_initcall(register_cpufreq_notifier); + +#endif -- 1.7.5.4
WARNING: multiple messages have this Message-ID (diff)
From: shawn.guo@linaro.org (Shawn Guo) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/3] ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp Date: Fri, 10 Aug 2012 13:37:23 +0800 [thread overview] Message-ID: <1344577046-14847-2-git-send-email-shawn.guo@linaro.org> (raw) In-Reply-To: <1344577046-14847-1-git-send-email-shawn.guo@linaro.org> From: Richard Zhao <richard.zhao@linaro.org> If CONFIG_SMP, cpufreq skips loops_per_jiffy update, because different arch has different per-cpu loops_per_jiffy definition. Signed-off-by: Richard Zhao <richard.zhao@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org> --- arch/arm/kernel/smp.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 54 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index ebd8ad2..8e03567 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -25,6 +25,7 @@ #include <linux/percpu.h> #include <linux/clockchips.h> #include <linux/completion.h> +#include <linux/cpufreq.h> #include <linux/atomic.h> #include <asm/cacheflush.h> @@ -584,3 +585,56 @@ int setup_profiling_timer(unsigned int multiplier) { return -EINVAL; } + +#ifdef CONFIG_CPU_FREQ + +static DEFINE_PER_CPU(unsigned long, l_p_j_ref); +static DEFINE_PER_CPU(unsigned long, l_p_j_ref_freq); +static unsigned long global_l_p_j_ref; +static unsigned long global_l_p_j_ref_freq; + +static int cpufreq_callback(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct cpufreq_freqs *freq = data; + int cpu = freq->cpu; + + if (freq->flags & CPUFREQ_CONST_LOOPS) + return NOTIFY_OK; + + if (!per_cpu(l_p_j_ref, cpu)) { + per_cpu(l_p_j_ref, cpu) = + per_cpu(cpu_data, cpu).loops_per_jiffy; + per_cpu(l_p_j_ref_freq, cpu) = freq->old; + if (!global_l_p_j_ref) { + global_l_p_j_ref = loops_per_jiffy; + global_l_p_j_ref_freq = freq->old; + } + } + + if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) || + (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) || + (val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) { + loops_per_jiffy = cpufreq_scale(global_l_p_j_ref, + global_l_p_j_ref_freq, + freq->new); + per_cpu(cpu_data, cpu).loops_per_jiffy = + cpufreq_scale(per_cpu(l_p_j_ref, cpu), + per_cpu(l_p_j_ref_freq, cpu), + freq->new); + } + return NOTIFY_OK; +} + +static struct notifier_block cpufreq_notifier = { + .notifier_call = cpufreq_callback, +}; + +static int __init register_cpufreq_notifier(void) +{ + return cpufreq_register_notifier(&cpufreq_notifier, + CPUFREQ_TRANSITION_NOTIFIER); +} +core_initcall(register_cpufreq_notifier); + +#endif -- 1.7.5.4
next prev parent reply other threads:[~2012-08-10 5:37 UTC|newest] Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-08-10 5:37 [PATCH v3 0/3] Add a generic cpufreq-cpu0 driver Shawn Guo 2012-08-10 5:37 ` Shawn Guo 2012-08-10 5:37 ` Shawn Guo [this message] 2012-08-10 5:37 ` [PATCH v3 1/3] ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp Shawn Guo 2012-09-04 23:27 ` Rafael J. Wysocki 2012-09-04 23:27 ` Rafael J. Wysocki [not found] ` <1344577046-14847-2-git-send-email-shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2012-09-06 22:35 ` Stephen Warren 2012-09-06 22:35 ` Stephen Warren [not found] ` <5049252D.9000802-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org> 2012-09-07 2:58 ` Shawn Guo 2012-09-07 2:58 ` Shawn Guo [not found] ` <20120907025847.GI26709-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org> 2012-09-07 16:55 ` Stephen Warren 2012-09-07 16:55 ` Stephen Warren 2012-09-10 1:17 ` Shawn Guo 2012-09-10 1:17 ` Shawn Guo [not found] ` <20120910011741.GP26709-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org> 2012-09-10 17:17 ` Stephen Warren 2012-09-10 17:17 ` Stephen Warren [not found] ` <504E20BE.8050107-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org> 2012-09-11 11:59 ` Prashant Gaikwad 2012-09-11 11:59 ` Prashant Gaikwad [not found] ` <504F2789.1070006-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2012-09-11 15:16 ` Stephen Warren 2012-09-11 15:16 ` Stephen Warren 2012-08-10 5:37 ` [PATCH v3 2/3] PM / OPP: Initialize OPP table from device tree Shawn Guo 2012-08-10 5:37 ` Shawn Guo 2012-08-16 21:05 ` Rafael J. Wysocki 2012-08-16 21:05 ` Rafael J. Wysocki [not found] ` <201208162305.55114.rjw-KKrjLPT3xs0@public.gmane.org> 2012-08-17 0:52 ` Shawn Guo 2012-08-17 0:52 ` Shawn Guo 2012-08-17 1:53 ` Rob Herring 2012-08-17 1:53 ` Rob Herring 2012-09-04 23:27 ` Rafael J. Wysocki 2012-09-04 23:27 ` Rafael J. Wysocki 2012-08-10 5:37 ` [PATCH v3 3/3] cpufreq: Add a generic cpufreq-cpu0 driver Shawn Guo 2012-08-10 5:37 ` Shawn Guo 2012-09-04 23:18 ` Rafael J. Wysocki 2012-09-04 23:18 ` Rafael J. Wysocki [not found] ` <201209050118.39045.rjw-KKrjLPT3xs0@public.gmane.org> 2012-09-05 1:12 ` Shawn Guo 2012-09-05 1:12 ` Shawn Guo 2012-09-05 4:53 ` AnilKumar, Chimata 2012-09-05 4:53 ` AnilKumar, Chimata 2012-09-05 5:02 ` Shilimkar, Santosh 2012-09-05 5:02 ` Shilimkar, Santosh 2012-09-05 13:38 ` Rafael J. Wysocki 2012-09-05 13:38 ` Rafael J. Wysocki 2012-09-05 13:59 ` Shawn Guo 2012-09-05 13:59 ` Shawn Guo 2012-09-05 20:18 ` Rafael J. Wysocki 2012-09-05 20:18 ` Rafael J. Wysocki 2012-09-06 7:29 ` Shawn Guo 2012-09-06 7:29 ` Shawn Guo [not found] ` <20120906072935.GB2362-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org> 2012-09-06 19:59 ` Rafael J. Wysocki 2012-09-06 19:59 ` Rafael J. Wysocki 2012-08-31 6:42 ` [PATCH v3 0/3] " Shawn Guo 2012-08-31 6:42 ` Shawn Guo 2012-09-01 5:53 ` Rafael J. Wysocki 2012-09-01 5:53 ` Rafael J. Wysocki
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