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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-11 13:21:10 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-11 15:45:52 +0100 |
| commit | 5c92d12411dfe5f0f3d1b1c1e2f756245e6f7249 (patch) | |
| tree | 498b78f995d917aa513cf15ada480327224c0277 /include/linux/perf_counter.h | |
| parent | 621a01eac89b5e2f81a4cf576568b31f40a02724 (diff) | |
| download | lwn-5c92d12411dfe5f0f3d1b1c1e2f756245e6f7249.tar.gz lwn-5c92d12411dfe5f0f3d1b1c1e2f756245e6f7249.zip | |
perf counters: implement PERF_COUNT_CPU_CLOCK
Impact: add new perf-counter type
The 'CPU clock' counter counts the amount of CPU clock time that is
elapsing, in nanoseconds. (regardless of how much of it the task is
spending on a CPU executing)
This counter type is a Linux kernel based abstraction, it is available
even if the hardware does not support native hardware performance counters.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 27385641ecb6..9a1713a1be27 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -131,7 +131,7 @@ struct perf_counter { struct list_head list_entry; struct list_head sibling_list; struct perf_counter *group_leader; - struct hw_perf_counter_ops *hw_ops; + const struct hw_perf_counter_ops *hw_ops; int active; #if BITS_PER_LONG == 64 @@ -197,7 +197,7 @@ struct perf_cpu_context { extern int perf_max_counters; #ifdef CONFIG_PERF_COUNTERS -extern struct hw_perf_counter_ops * +extern const struct hw_perf_counter_ops * hw_perf_counter_init(struct perf_counter *counter); extern void perf_counter_task_sched_in(struct task_struct *task, int cpu); @@ -208,6 +208,9 @@ extern void perf_counter_notify(struct pt_regs *regs); extern void perf_counter_print_debug(void); extern void hw_perf_restore_ctrl(u64 ctrl); extern u64 hw_perf_disable_all(void); +extern void atomic64_counter_set(struct perf_counter *counter, u64 val64); +extern u64 atomic64_counter_read(struct perf_counter *counter); + #else static inline void perf_counter_task_sched_in(struct task_struct *task, int cpu) { } @@ -219,7 +222,7 @@ static inline void perf_counter_init_task(struct task_struct *task) { } static inline void perf_counter_notify(struct pt_regs *regs) { } static inline void perf_counter_print_debug(void) { } static inline void hw_perf_restore_ctrl(u64 ctrl) { } -static inline u64 hw_perf_disable_all(void) { return 0; } +static inline u64 hw_perf_disable_all(void) { return 0; } #endif #endif /* _LINUX_PERF_COUNTER_H */ |