| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20130222123412.GB17948@somewhere.redhat.com> Date: Fri, 22 Feb 2013 13:34:14 +0100 From: Frederic Weisbecker <fweisbec@...il.com> To: Amit Kucheria <amit.kucheria@...aro.org> Cc: Viresh Kumar <viresh.kumar@...aro.org>, Kevin Hilman <khilman@...aro.org>, Lists linaro-kernel <linaro-kernel@...ts.linaro.org>, Peter Zijlstra <peterz@...radead.org>, 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 12:47:33PM +0530, Amit Kucheria wrote: > 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? No, Kevin has been using kcpustat_this_cpu_set() from kernel/sched/cputime.c. That's because it's always written locally. -- 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/
Powered by blists - more mailing lists