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#ifndef _SYS_TRACE_H_
#define _SYS_TRACE_H_
#ifdef CONFIG_SCHED_OVERHEAD_TRACE
#include <litmus/feather_trace.h>
#include <litmus/feather_buffer.h>
/*********************** TIMESTAMPS ************************/
enum task_type_marker {
TSK_BE,
TSK_RT,
TSK_UNKNOWN
};
struct timestamp {
uint64_t timestamp:48;
uint64_t pid:16;
uint32_t seq_no;
uint8_t cpu;
uint8_t event;
uint8_t task_type:2;
uint8_t irq_flag:1;
uint8_t irq_count:5;
};
/* tracing callbacks */
feather_callback void save_timestamp(unsigned long event);
feather_callback void save_timestamp_def(unsigned long event, unsigned long type);
feather_callback void save_timestamp_task(unsigned long event, unsigned long t_ptr);
feather_callback void save_timestamp_cpu(unsigned long event, unsigned long cpu);
feather_callback void save_timestamp_time(unsigned long event, unsigned long time_ptr);
feather_callback void save_timestamp_irq(unsigned long event, unsigned long irq_count_ptr);
feather_callback void save_timestamp_hide_irq(unsigned long event);
#define TIMESTAMP(id) ft_event0(id, save_timestamp)
#define DTIMESTAMP(id, def) ft_event1(id, save_timestamp_def, (unsigned long) def)
#define TIMESTAMP_CUR(id) DTIMESTAMP(id, is_realtime(current) ? TSK_RT : TSK_BE)
#define TTIMESTAMP(id, task) \
ft_event1(id, save_timestamp_task, (unsigned long) task)
#define CTIMESTAMP(id, cpu) \
ft_event1(id, save_timestamp_cpu, (unsigned long) cpu)
#define TIMESTAMP_TIME(id, time_ptr) \
ft_event1(id, save_timestamp_time, (unsigned long) time_ptr)
#define TIMESTAMP_IRQ(id, irq_count_ptr) \
ft_event1(id, save_timestamp_irq, (unsigned long) irq_count_ptr)
#define TIMESTAMP_IN_IRQ(id) \
ft_event0(id, save_timestamp_hide_irq)
#else /* !CONFIG_SCHED_OVERHEAD_TRACE */
#define TIMESTAMP(id) /* no tracing */
#define DTIMESTAMP(id, def) /* no tracing */
#define TIMESTAMP_CUR(id) /* no tracing */
#define TTIMESTAMP(id, task) /* no tracing */
#define CTIMESTAMP(id, cpu) /* no tracing */
#define TIMESTAMP_TIME(id, time_ptr) /* no tracing */
#define TIMESTAMP_IRQ(id, irq_count_ptr) /* no tracing */
#define TIMESTAMP_IN_IRQ(id) /* no tracing */
#endif
/* Convention for timestamps
* =========================
*
* In order to process the trace files with a common tool, we use the following
* convention to measure execution times: The end time id of a code segment is
* always the next number after the start time event id.
*/
#define __TS_SYSCALL_IN_START(p) TIMESTAMP_TIME(10, p)
#define __TS_SYSCALL_IN_END(p) TIMESTAMP_IRQ(11, p)
#define TS_SYSCALL_OUT_START TIMESTAMP_CUR(20)
#define TS_SYSCALL_OUT_END TIMESTAMP_CUR(21)
#define TS_LOCK_START TIMESTAMP_CUR(30)
#define TS_LOCK_END TIMESTAMP_CUR(31)
#define TS_LOCK_SUSPEND TIMESTAMP_CUR(38)
#define TS_LOCK_RESUME TIMESTAMP_CUR(39)
#define TS_UNLOCK_START TIMESTAMP_CUR(40)
#define TS_UNLOCK_END TIMESTAMP_CUR(41)
#define TS_SCHED_START DTIMESTAMP(100, TSK_UNKNOWN) /* we only
* care
* about
* next */
#define TS_SCHED_END(t) TTIMESTAMP(101, t)
#define TS_SCHED2_START(t) TTIMESTAMP(102, t)
#define TS_SCHED2_END(t) TTIMESTAMP(103, t)
#define TS_CXS_START(t) TTIMESTAMP(104, t)
#define TS_CXS_END(t) TTIMESTAMP(105, t)
#define TS_RELEASE_START DTIMESTAMP(106, TSK_RT)
#define TS_RELEASE_END DTIMESTAMP(107, TSK_RT)
#define TS_TICK_START(t) TTIMESTAMP(110, t)
#define TS_TICK_END(t) TTIMESTAMP(111, t)
#define TS_PLUGIN_SCHED_START /* TIMESTAMP(120) */ /* currently unused */
#define TS_PLUGIN_SCHED_END /* TIMESTAMP(121) */
#define TS_PLUGIN_TICK_START /* TIMESTAMP(130) */
#define TS_PLUGIN_TICK_END /* TIMESTAMP(131) */
#define TS_ENTER_NP_START TIMESTAMP(140)
#define TS_ENTER_NP_END TIMESTAMP(141)
#define TS_EXIT_NP_START TIMESTAMP(150)
#define TS_EXIT_NP_END TIMESTAMP(151)
#define TS_SEND_RESCHED_START(c) CTIMESTAMP(190, c)
#define TS_SEND_RESCHED_END TIMESTAMP_IN_IRQ(191)
#endif /* !_SYS_TRACE_H_ */
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