projects / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 2cb7cef9 BS |
1 | From: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> |
| 2 | Subject: export get_cpu_idle_time_us() | |
| 3 | ||
| 4 | export get_cpu_idle_time_us() for it to be used in ondemand governor. | |
| 5 | Last update time can be current time when the CPU is currently non-idle, | |
| 6 | accounting for the busy time since last idle. | |
| 7 | ||
| 8 | Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | |
| 9 | Signed-off-by: Thomas Renninger <trenn@suse.de> | |
| 10 | ||
| 11 | --- | |
| 12 | include/linux/tick.h | 2 +- | |
| 13 | kernel/time/tick-sched.c | 11 ++++++++++- | |
| 14 | 2 files changed, 11 insertions(+), 2 deletions(-) | |
| 15 | ||
| 16 | Index: cpufreq.git/kernel/time/tick-sched.c | |
| 17 | =================================================================== | |
| 18 | --- cpufreq.git.orig/kernel/time/tick-sched.c 2008-07-31 10:04:55.000000000 -0700 | |
| 19 | +++ cpufreq.git/kernel/time/tick-sched.c 2008-07-31 14:52:18.000000000 -0700 | |
| 20 | @@ -20,6 +20,7 @@ | |
| 21 | #include <linux/profile.h> | |
| 22 | #include <linux/sched.h> | |
| 23 | #include <linux/tick.h> | |
| 24 | +#include <linux/module.h> | |
| 25 | ||
| 26 | #include <asm/irq_regs.h> | |
| 27 | ||
| 28 | @@ -184,9 +185,17 @@ u64 get_cpu_idle_time_us(int cpu, u64 *l | |
| 29 | { | |
| 30 | struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); | |
| 31 | ||
| 32 | - *last_update_time = ktime_to_us(ts->idle_lastupdate); | |
| 33 | + if (!tick_nohz_enabled) | |
| 34 | + return -1; | |
| 35 | + | |
| 36 | + if (ts->idle_active) | |
| 37 | + *last_update_time = ktime_to_us(ts->idle_lastupdate); | |
| 38 | + else | |
| 39 | + *last_update_time = ktime_to_us(ktime_get()); | |
| 40 | + | |
| 41 | return ktime_to_us(ts->idle_sleeptime); | |
| 42 | } | |
| 43 | +EXPORT_SYMBOL_GPL(get_cpu_idle_time_us); | |
| 44 | ||
| 45 | /** | |
| 46 | * tick_nohz_stop_sched_tick - stop the idle tick from the idle task | |
| 47 | Index: cpufreq.git/include/linux/tick.h | |
| 48 | =================================================================== | |
| 49 | --- cpufreq.git.orig/include/linux/tick.h 2008-07-31 10:04:54.000000000 -0700 | |
| 50 | +++ cpufreq.git/include/linux/tick.h 2008-07-31 14:52:18.000000000 -0700 | |
| 51 | @@ -123,7 +123,7 @@ static inline ktime_t tick_nohz_get_slee | |
| 52 | return len; | |
| 53 | } | |
| 54 | static inline void tick_nohz_stop_idle(int cpu) { } | |
| 55 | -static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return 0; } | |
| 56 | +static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } | |
| 57 | # endif /* !NO_HZ */ | |
| 58 | ||
| 59 | #endif | |
| 60 | ||
| 61 | -- |