perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track...

[net-next-2.6.git] / include / linux / perf_event.h

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 23cd0057a6815cf84adf07ea62bf2f5657d6b079..7cd7b356447db128cee59fdff4bfd5b1281c55f8 100644 (file)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -485,6 +485,7 @@ struct perf_guest_info_callbacks {
 #include <linux/ftrace.h>
 #include <linux/cpu.h>
 #include <asm/atomic.h>
+#include <asm/local.h>
 
 #define PERF_MAX_STACK_DEPTH           255
 
@@ -547,6 +548,8 @@ struct hw_perf_event {
 
 struct perf_event;
 
+#define PERF_EVENT_TXN_STARTED 1
+
 /**
  * struct pmu - generic performance monitoring unit
  */
@@ -557,13 +560,22 @@ struct pmu {
        void (*stop)                    (struct perf_event *event);
        void (*read)                    (struct perf_event *event);
        void (*unthrottle)              (struct perf_event *event);
+
+       /*
+        * group events scheduling is treated as a transaction,
+        * add group events as a whole and perform one schedulability test.
+        * If test fails, roll back the whole group
+        */
+
+       void (*start_txn)       (const struct pmu *pmu);
+       void (*cancel_txn)      (const struct pmu *pmu);
+       int  (*commit_txn)      (const struct pmu *pmu);
 };
 
 /**
  * enum perf_event_active_state - the states of a event
  */
 enum perf_event_active_state {
-       PERF_EVENT_STATE_FREE           = -3,
        PERF_EVENT_STATE_ERROR          = -2,
        PERF_EVENT_STATE_OFF            = -1,
        PERF_EVENT_STATE_INACTIVE       =  0,
@@ -577,20 +589,18 @@ struct perf_mmap_data {
 #ifdef CONFIG_PERF_USE_VMALLOC
        struct work_struct              work;
 #endif
-       int                             data_order;
+       int                             data_order;     /* allocation order  */
        int                             nr_pages;       /* nr of data pages  */
        int                             writable;       /* are we writable   */
        int                             nr_locked;      /* nr pages mlocked  */
 
        atomic_t                        poll;           /* POLL_ for wakeups */
-       atomic_t                        events;         /* event_id limit       */
-
-       atomic_long_t                   head;           /* write position    */
-       atomic_long_t                   done_head;      /* completed head    */
 
-       atomic_t                        lock;           /* concurrent writes */
-       atomic_t                        wakeup;         /* needs a wakeup    */
-       atomic_t                        lost;           /* nr records lost   */
+       local_t                         head;           /* write position    */
+       local_t                         nest;           /* nested writers    */
+       local_t                         events;         /* event limit       */
+       local_t                         wakeup;         /* needs a wakeup    */
+       local_t                         lost;           /* nr records lost   */
 
        long                            watermark;      /* wakeup watermark  */
 
@@ -717,6 +727,7 @@ struct perf_event {
        perf_overflow_handler_t         overflow_handler;
 
 #ifdef CONFIG_EVENT_TRACING
+       struct ftrace_event_call        *tp_event;
        struct event_filter             *filter;
 #endif
 
@@ -794,9 +805,9 @@ struct perf_output_handle {
        struct perf_mmap_data           *data;
        unsigned long                   head;
        unsigned long                   offset;
+       unsigned long                   wakeup;
        int                             nmi;
        int                             sample;
-       int                             locked;
 };
 
 #ifdef CONFIG_PERF_EVENTS
@@ -823,9 +834,6 @@ extern void perf_disable(void);
 extern void perf_enable(void);
 extern int perf_event_task_disable(void);
 extern int perf_event_task_enable(void);
-extern int hw_perf_group_sched_in(struct perf_event *group_leader,
-              struct perf_cpu_context *cpuctx,
-              struct perf_event_context *ctx);
 extern void perf_event_update_userpage(struct perf_event *event);
 extern int perf_event_release_kernel(struct perf_event *event);
 extern struct perf_event *
@@ -985,8 +993,9 @@ static inline bool perf_paranoid_kernel(void)
 }
 
 extern void perf_event_init(void);
-extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
-                         int entry_size, struct pt_regs *regs);
+extern void perf_tp_event(u64 addr, u64 count, void *record,
+                         int entry_size, struct pt_regs *regs,
+                         struct hlist_head *head);
 extern void perf_bp_event(struct perf_event *event, void *data);
 
 #ifndef perf_misc_flags