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Message-ID: <CAP245DVYsjgvww-3qBnbZ4T7SsJ=whbVvhf06fArxcspyX9bwQ@mail.gmail.com> Date: Fri, 22 Feb 2013 12:47:33 +0530 From: Amit Kucheria <amit.kucheria@...aro.org> To: Viresh Kumar <viresh.kumar@...aro.org> Cc: Kevin Hilman <khilman@...aro.org>, Lists linaro-kernel <linaro-kernel@...ts.linaro.org>, Peter Zijlstra <peterz@...radead.org>, Frederic Weisbecker <fweisbec@...il.com>, linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>, "Rafael J. Wysocki" <rjw@...k.pl>, Russell King <rmk+kernel@....linux.org.uk>, Ingo Molnar <mingo@...nel.org>, Lists LAKML <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH 1/2] cpustat: use accessor functions for get/set/add On Fri, Feb 22, 2013 at 11:51 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote: > On Fri, Feb 22, 2013 at 11:26 AM, Kevin Hilman <khilman@...aro.org> wrote: >> Add some accessor functions in order to facilitate the conversion to >> atomic reads/writes of cpustat values. >> >> Signed-off-by: Kevin Hilman <khilman@...aro.org> >> --- >> drivers/cpufreq/cpufreq_governor.c | 18 ++++++++--------- >> drivers/cpufreq/cpufreq_ondemand.c | 2 +- > >> diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c >> index 6c5f1d3..ec6c315 100644 >> --- a/drivers/cpufreq/cpufreq_governor.c >> +++ b/drivers/cpufreq/cpufreq_governor.c >> @@ -36,12 +36,12 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall) >> >> cur_wall_time = jiffies64_to_cputime64(get_jiffies_64()); >> >> - busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER]; >> - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM]; >> - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ]; >> - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ]; >> - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL]; >> - busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE]; >> + busy_time = kcpustat_cpu_get(cpu, CPUTIME_USER); >> + busy_time += kcpustat_cpu_get(cpu, CPUTIME_SYSTEM); >> + busy_time += kcpustat_cpu_get(cpu, CPUTIME_IRQ); >> + busy_time += kcpustat_cpu_get(cpu, CPUTIME_SOFTIRQ); >> + busy_time += kcpustat_cpu_get(cpu, CPUTIME_STEAL); >> + busy_time += kcpustat_cpu_get(cpu, CPUTIME_NICE); >> >> idle_time = cur_wall_time - busy_time; >> if (wall) >> @@ -103,7 +103,7 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu) >> u64 cur_nice; >> unsigned long cur_nice_jiffies; >> >> - cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE] - >> + cur_nice = kcpustat_cpu_get(j, CPUTIME_NICE) - >> cdbs->prev_cpu_nice; >> /* >> * Assumption: nice time between sampling periods will >> @@ -113,7 +113,7 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu) >> cputime64_to_jiffies64(cur_nice); >> >> cdbs->prev_cpu_nice = >> - kcpustat_cpu(j).cpustat[CPUTIME_NICE]; >> + kcpustat_cpu_get(j, CPUTIME_NICE); >> idle_time += jiffies_to_usecs(cur_nice_jiffies); >> } >> >> @@ -216,7 +216,7 @@ int cpufreq_governor_dbs(struct dbs_data *dbs_data, >> &j_cdbs->prev_cpu_wall); >> if (ignore_nice) >> j_cdbs->prev_cpu_nice = >> - kcpustat_cpu(j).cpustat[CPUTIME_NICE]; >> + kcpustat_cpu_get(j, CPUTIME_NICE); >> } >> >> /* >> diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c >> index 7731f7c..ac5d49f 100644 >> --- a/drivers/cpufreq/cpufreq_ondemand.c >> +++ b/drivers/cpufreq/cpufreq_ondemand.c >> @@ -403,7 +403,7 @@ static ssize_t store_ignore_nice_load(struct kobject *a, struct attribute *b, >> &dbs_info->cdbs.prev_cpu_wall); >> if (od_tuners.ignore_nice) >> dbs_info->cdbs.prev_cpu_nice = >> - kcpustat_cpu(j).cpustat[CPUTIME_NICE]; >> + kcpustat_cpu_get(j, CPUTIME_NICE); >> >> } >> return count; > > For cpufreq: > > Acked-by: Viresh Kumar <viresh.kumar@...aro.org> > > Though i believe you also need this: > > diff --git a/drivers/cpufreq/cpufreq_conservative.c > b/drivers/cpufreq/cpufreq_conservative.c > index 64ef737..38e3ad7 100644 > --- a/drivers/cpufreq/cpufreq_conservative.c > +++ b/drivers/cpufreq/cpufreq_conservative.c > @@ -242,7 +242,7 @@ static ssize_t store_ignore_nice_load(struct > kobject *a, struct attribute *b, > &dbs_info->cdbs.prev_cpu_wall); > if (cs_tuners.ignore_nice) > dbs_info->cdbs.prev_cpu_nice = > - kcpustat_cpu(j).cpustat[CPUTIME_NICE]; > + kcpustat_cpu_get(j, CPUTIME_NICE); > } > return count; > } > > BTW, i don't see kcpustat_cpu() used in > > kernel/sched/core.c | 12 +++++------- > kernel/sched/cputime.c | 29 +++++++++++++-------------- > > I searched tip/master as well as lnext/master. Added by Frederic's Adaptive NOHZ patchset? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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