diff options
| author | Connor O'Brien <connoro@google.com> | 2018-01-31 18:11:57 -0800 |
|---|---|---|
| committer | Connor O'Brien <connoro@google.com> | 2018-03-06 20:37:28 +0000 |
| commit | fba21f6831a2c5507adb5f4d9e35f02e207ad18b (patch) | |
| tree | 06b256364987c67a6e20a083ad0e327b01c06c79 /include | |
| parent | d63fdf61a4dc9ba1ac84bc975f79cdc59296777e (diff) | |
ANDROID: cpufreq: track per-task time in state
Add time in state data to task structs, and create
/proc/<pid>/time_in_state files to show how long each individual task
has run at each frequency.
Create a CONFIG_CPU_FREQ_TIMES option to enable/disable this tracking.
Signed-off-by: Connor O'Brien <connoro@google.com>
Bug: 72339335
Test: Read /proc/<pid>/time_in_state
Change-Id: Ia6456754f4cb1e83b2bc35efa8fbe9f8696febc8
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpufreq_times.h | 34 | ||||
| -rw-r--r-- | include/linux/sched.h | 4 |
2 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/cpufreq_times.h b/include/linux/cpufreq_times.h new file mode 100644 index 000000000000..87f3ff4bc60a --- /dev/null +++ b/include/linux/cpufreq_times.h @@ -0,0 +1,34 @@ +/* drivers/cpufreq/cpufreq_times.c + * + * Copyright (C) 2018 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef _LINUX_CPUFREQ_TIMES_H +#define _LINUX_CPUFREQ_TIMES_H + +#include <linux/cpufreq.h> + +#ifdef CONFIG_CPU_FREQ_TIMES +void cpufreq_task_times_init(struct task_struct *p); +void cpufreq_task_times_exit(struct task_struct *p); +int proc_time_in_state_show(struct seq_file *m, struct pid_namespace *ns, + struct pid *pid, struct task_struct *p); +void cpufreq_acct_update_power(struct task_struct *p, cputime_t cputime); +void cpufreq_times_create_policy(struct cpufreq_policy *policy); +void cpufreq_times_record_transition(struct cpufreq_freqs *freq); +#else +static inline void cpufreq_times_create_policy(struct cpufreq_policy *policy) {} +static inline void cpufreq_times_record_transition( + struct cpufreq_freqs *freq) {} +#endif /* CONFIG_CPU_FREQ_TIMES */ +#endif /* _LINUX_CPUFREQ_TIMES_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 8377ac73a034..24ea3398ae15 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1702,6 +1702,10 @@ struct task_struct { cputime_t utime, stime, utimescaled, stimescaled; cputime_t gtime; +#ifdef CONFIG_CPU_FREQ_TIMES + u64 *time_in_state; + unsigned int max_state; +#endif struct prev_cputime prev_cputime; #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN seqlock_t vtime_seqlock; |