diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index dc6f357390e2..e794527e4925 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -96,15 +96,25 @@ static struct dbs_tuners { static inline cputime64_t get_cpu_idle_time(unsigned int cpu) { - cputime64_t retval; + cputime64_t idle_time; + cputime64_t cur_jiffies; + cputime64_t busy_time; - retval = cputime64_add(kstat_cpu(cpu).cpustat.idle, - kstat_cpu(cpu).cpustat.iowait); + cur_jiffies = jiffies64_to_cputime64(get_jiffies_64()); + busy_time = cputime64_add(kstat_cpu(cpu).cpustat.user, + kstat_cpu(cpu).cpustat.system); - if (dbs_tuners_ins.ignore_nice) - retval = cputime64_add(retval, kstat_cpu(cpu).cpustat.nice); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.irq); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.softirq); + busy_time = cputime64_add(busy_time, kstat_cpu(cpu).cpustat.steal); - return retval; + if (!dbs_tuners_ins.ignore_nice) { + busy_time = cputime64_add(busy_time, + kstat_cpu(cpu).cpustat.nice); + } + + idle_time = cputime64_sub(cur_jiffies, busy_time); + return idle_time; } /* @@ -339,7 +349,8 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info) cur_jiffies = jiffies64_to_cputime64(get_jiffies_64()); total_ticks = (unsigned int) cputime64_sub(cur_jiffies, this_dbs_info->prev_cpu_wall); - this_dbs_info->prev_cpu_wall = cur_jiffies; + this_dbs_info->prev_cpu_wall = get_jiffies_64(); + if (!total_ticks) return; /* |