a089724958
Create trace2_initialize_clock() and call from main() to capture process start time in isolation and before other sub-systems are ready. Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
#ifndef TR2_TLS_H
|
|
#define TR2_TLS_H
|
|
|
|
#include "strbuf.h"
|
|
|
|
/*
|
|
* Arbitry limit for thread names for column alignment.
|
|
*/
|
|
#define TR2_MAX_THREAD_NAME (24)
|
|
|
|
struct tr2tls_thread_ctx {
|
|
struct strbuf thread_name;
|
|
uint64_t *array_us_start;
|
|
int alloc;
|
|
int nr_open_regions; /* plays role of "nr" in ALLOC_GROW */
|
|
int thread_id;
|
|
};
|
|
|
|
/*
|
|
* Create TLS data for the current thread. This gives us a place to
|
|
* put per-thread data, such as thread start time, function nesting
|
|
* and a per-thread label for our messages.
|
|
*
|
|
* We assume the first thread is "main". Other threads are given
|
|
* non-zero thread-ids to help distinguish messages from concurrent
|
|
* threads.
|
|
*
|
|
* Truncate the thread name if necessary to help with column alignment
|
|
* in printf-style messages.
|
|
*
|
|
* In this and all following functions the term "self" refers to the
|
|
* current thread.
|
|
*/
|
|
struct tr2tls_thread_ctx *tr2tls_create_self(const char *thread_name,
|
|
uint64_t us_thread_start);
|
|
|
|
/*
|
|
* Get our TLS data.
|
|
*/
|
|
struct tr2tls_thread_ctx *tr2tls_get_self(void);
|
|
|
|
/*
|
|
* return true if the current thread is the main thread.
|
|
*/
|
|
int tr2tls_is_main_thread(void);
|
|
|
|
/*
|
|
* Free our TLS data.
|
|
*/
|
|
void tr2tls_unset_self(void);
|
|
|
|
/*
|
|
* Begin a new nested region and remember the start time.
|
|
*/
|
|
void tr2tls_push_self(uint64_t us_now);
|
|
|
|
/*
|
|
* End the innermost nested region.
|
|
*/
|
|
void tr2tls_pop_self(void);
|
|
|
|
/*
|
|
* Pop any extra (above the first) open regions on the current
|
|
* thread and discard. During a thread-exit, we should only
|
|
* have region[0] that was pushed in trace2_thread_start() if
|
|
* the thread exits normally.
|
|
*/
|
|
void tr2tls_pop_unwind_self(void);
|
|
|
|
/*
|
|
* Compute the elapsed time since the innermost region in the
|
|
* current thread started and the given time (usually now).
|
|
*/
|
|
uint64_t tr2tls_region_elasped_self(uint64_t us);
|
|
|
|
/*
|
|
* Compute the elapsed time since the main thread started
|
|
* and the given time (usually now). This is assumed to
|
|
* be the absolute run time of the process.
|
|
*/
|
|
uint64_t tr2tls_absolute_elapsed(uint64_t us);
|
|
|
|
/*
|
|
* Initialize the tr2 TLS system.
|
|
*/
|
|
void tr2tls_init(void);
|
|
|
|
/*
|
|
* Free all tr2 TLS resources.
|
|
*/
|
|
void tr2tls_release(void);
|
|
|
|
/*
|
|
* Protected increment of an integer.
|
|
*/
|
|
int tr2tls_locked_increment(int *p);
|
|
|
|
/*
|
|
* Capture the process start time and do nothing else.
|
|
*/
|
|
void tr2tls_start_process_clock(void);
|
|
|
|
#endif /* TR2_TLS_H */
|