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/* sched_trace.h -- record scheduler events to a byte stream for offline analysis.
*/
#ifndef _LINUX_SCHED_TRACE_H_
#define _LINUX_SCHED_TRACE_H_
/* all times in nanoseconds */
struct st_trace_header {
u8 type; /* Of what type is this record? */
u8 cpu; /* On which CPU was it recorded? */
u16 pid; /* PID of the task. */
u32 job; /* The job sequence number. */
};
#define ST_NAME_LEN 16
struct st_name_data {
char cmd[ST_NAME_LEN];/* The name of the executable of this process. */
};
struct st_param_data { /* regular params */
u32 wcet;
u32 period;
u32 phase;
u8 partition;
u8 __unused[3];
};
struct st_release_data { /* A job is was/is going to be released. */
u64 release; /* What's the release time? */
u64 deadline; /* By when must it finish? */
};
struct st_assigned_data { /* A job was asigned to a CPU. */
u64 when;
u8 target; /* Where should it execute? */
u8 __unused[3];
};
struct st_switch_to_data { /* A process was switched to on a given CPU. */
u64 when; /* When did this occur? */
u32 exec_time; /* Time the current job has executed. */
};
struct st_switch_away_data { /* A process was switched away from on a given CPU. */
u64 when;
u64 exec_time;
};
struct st_completion_data { /* A job completed. */
u64 when;
u8 forced:1; /* Set to 1 if job overran and kernel advanced to the
* next task automatically; set to 0 otherwise.
*/
u8 __uflags:7;
u8 __unused[3];
};
struct st_block_data { /* A task blocks. */
u64 when;
u64 __unused;
};
struct st_resume_data { /* A task resumes. */
u64 when;
u64 __unused;
};
struct st_sys_release_data {
u64 when;
u64 release;
};
#define DATA(x) struct st_ ## x ## _data x;
typedef enum {
ST_NAME = 1, /* Start at one, so that we can spot
* uninitialized records. */
ST_PARAM,
ST_RELEASE,
ST_ASSIGNED,
ST_SWITCH_TO,
ST_SWITCH_AWAY,
ST_COMPLETION,
ST_BLOCK,
ST_RESUME,
ST_SYS_RELEASE,
} st_event_record_type_t;
struct st_event_record {
struct st_trace_header hdr;
union {
u64 raw[2];
DATA(name);
DATA(param);
DATA(release);
DATA(assigned);
DATA(switch_to);
DATA(switch_away);
DATA(completion);
DATA(block);
DATA(resume);
DATA(sys_release);
} data;
};
#undef DATA
#ifdef __KERNEL__
#include <linux/sched.h>
#include <litmus/feather_trace.h>
#ifdef CONFIG_SCHED_TASK_TRACE
#define SCHED_TRACE(id, callback, task) \
ft_event1(id, callback, task)
#define SCHED_TRACE2(id, callback, task, xtra) \
ft_event2(id, callback, task, xtra)
/* provide prototypes; needed on sparc64 */
#ifndef NO_TASK_TRACE_DECLS
feather_callback void do_sched_trace_task_name(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_param(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_release(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_switch_to(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_switch_away(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_completion(unsigned long id,
struct task_struct* task,
unsigned long forced);
feather_callback void do_sched_trace_task_block(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_task_resume(unsigned long id,
struct task_struct* task);
feather_callback void do_sched_trace_sys_release(unsigned long id,
lt_t* start);
#endif
#else
#define SCHED_TRACE(id, callback, task) /* no tracing */
#define SCHED_TRACE2(id, callback, task, xtra) /* no tracing */
#endif
#define SCHED_TRACE_BASE_ID 500
#define sched_trace_task_name(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 1, do_sched_trace_task_name, t)
#define sched_trace_task_param(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 2, do_sched_trace_task_param, t)
#define sched_trace_task_release(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 3, do_sched_trace_task_release, t)
#define sched_trace_task_switch_to(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 4, do_sched_trace_task_switch_to, t)
#define sched_trace_task_switch_away(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 5, do_sched_trace_task_switch_away, t)
#define sched_trace_task_completion(t, forced) \
SCHED_TRACE2(SCHED_TRACE_BASE_ID + 6, do_sched_trace_task_completion, t, \
forced)
#define sched_trace_task_block(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 7, do_sched_trace_task_block, t)
#define sched_trace_task_resume(t) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 8, do_sched_trace_task_resume, t)
#define sched_trace_sys_release(when) \
SCHED_TRACE(SCHED_TRACE_BASE_ID + 9, do_sched_trace_sys_release, when)
#define sched_trace_quantum_boundary() /* NOT IMPLEMENTED */
#ifdef CONFIG_SCHED_DEBUG_TRACE
void sched_trace_log_message(const char* fmt, ...);
void dump_trace_buffer(int max);
#else
#define sched_trace_log_message(fmt, ...)
#endif
#endif /* __KERNEL__ */
#endif
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