diff options
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 279d2552dae7..a01185969457 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -71,6 +71,7 @@ #include <linux/ctype.h> #include <linux/ftrace.h> #include <linux/slab.h> +#include <linux/cpuacct.h> #include <asm/tlb.h> #include <asm/irq_regs.h> @@ -9104,8 +9105,30 @@ struct cpuacct { u64 __percpu *cpuusage; struct percpu_counter cpustat[CPUACCT_STAT_NSTATS]; struct cpuacct *parent; + struct cpuacct_charge_calls *cpufreq_fn; + void *cpuacct_data; }; +static struct cpuacct *cpuacct_root; + +/* Default calls for cpufreq accounting */ +static struct cpuacct_charge_calls *cpuacct_cpufreq; +int cpuacct_register_cpufreq(struct cpuacct_charge_calls *fn) +{ + cpuacct_cpufreq = fn; + + /* + * Root node is created before platform can register callbacks, + * initalize here. + */ + if (cpuacct_root && fn) { + cpuacct_root->cpufreq_fn = fn; + if (fn->init) + fn->init(&cpuacct_root->cpuacct_data); + } + return 0; +} + struct cgroup_subsys cpuacct_subsys; /* return cpu accounting group corresponding to this container */ @@ -9140,8 +9163,16 @@ static struct cgroup_subsys_state *cpuacct_create( if (percpu_counter_init(&ca->cpustat[i], 0)) goto out_free_counters; + ca->cpufreq_fn = cpuacct_cpufreq; + + /* If available, have platform code initalize cpu frequency table */ + if (ca->cpufreq_fn && ca->cpufreq_fn->init) + ca->cpufreq_fn->init(&ca->cpuacct_data); + if (cgrp->parent) ca->parent = cgroup_ca(cgrp->parent); + else + cpuacct_root = ca; return &ca->css; @@ -9269,6 +9300,16 @@ static int cpuacct_stats_show(struct cgroup *cgrp, struct cftype *cft, return 0; } +static int cpuacct_cpufreq_show(struct cgroup *cgrp, struct cftype *cft, + struct cgroup_map_cb *cb) +{ + struct cpuacct *ca = cgroup_ca(cgrp); + if (ca->cpufreq_fn && ca->cpufreq_fn->show) + ca->cpufreq_fn->show(ca->cpuacct_data, cb); + + return 0; +} + static struct cftype files[] = { { .name = "usage", @@ -9283,6 +9324,10 @@ static struct cftype files[] = { .name = "stat", .read_map = cpuacct_stats_show, }, + { + .name = "cpufreq", + .read_map = cpuacct_cpufreq_show, + }, }; static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp) @@ -9312,6 +9357,10 @@ static void cpuacct_charge(struct task_struct *tsk, u64 cputime) for (; ca; ca = ca->parent) { u64 *cpuusage = per_cpu_ptr(ca->cpuusage, cpu); *cpuusage += cputime; + + /* Call back into platform code to account for CPU speeds */ + if (ca->cpufreq_fn && ca->cpufreq_fn->charge) + ca->cpufreq_fn->charge(ca->cpuacct_data, cputime, cpu); } rcu_read_unlock(); |