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| author | Ingo Molnar <mingo@elte.hu> | 2008-05-12 21:20:41 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 20:30:55 +0200 |
| commit | bd3bff9e20f454b242d979ec2f9a4dca0d5fa06f (patch) | |
| tree | f9aa5959cb63a0c9d51185109264dd0b0f547765 /include/linux/sched.h | |
| parent | 75d3bce2fc0a80f435fe12f2c9ed2632c8ac29e4 (diff) | |
| download | lwn-bd3bff9e20f454b242d979ec2f9a4dca0d5fa06f.tar.gz lwn-bd3bff9e20f454b242d979ec2f9a4dca0d5fa06f.zip | |
sched: add latency tracer callbacks to the scheduler
add 3 lightweight callbacks to the tracer backend.
zero impact if tracing is turned off.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 5395a6176f4b..717cab8a0c83 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2117,6 +2117,32 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm) } #endif +#ifdef CONFIG_CONTEXT_SWITCH_TRACER +extern void +ftrace_ctx_switch(struct task_struct *prev, struct task_struct *next); +#else +static inline void +ftrace_ctx_switch(struct task_struct *prev, struct task_struct *next) +{ +} +#endif + +#ifdef CONFIG_SCHED_TRACER +extern void +ftrace_wake_up_task(struct task_struct *wakee, struct task_struct *curr); +extern void +ftrace_wake_up_new_task(struct task_struct *wakee, struct task_struct *curr); +#else +static inline void +ftrace_wake_up_task(struct task_struct *wakee, struct task_struct *curr) +{ +} +static inline void +ftrace_wake_up_new_task(struct task_struct *wakee, struct task_struct *curr) +{ +} +#endif + extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask); extern long sched_getaffinity(pid_t pid, cpumask_t *mask); |