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CLEANUP: task: rename ->call_date to ->wake_date

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This field is misnamed because its real and important content is the
date the task was woken up, not the date it was called. It temporarily
holds the call date during execution but this remains confusing. In
fact before the latency measurements were possible it was indeed a call
date. Thus is will now be called wake_date.

This change is necessary because a subsequent fix will require the
introduction of the real call date in the thread ctx.
This commit is contained in:
Willy Tarreau 2022-09-07 14:49:50 +02:00
parent 768c2c5678
commit 04e50b3d32
5 changed files with 27 additions and 27 deletions
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4
include/haproxy/task-t.h
View File

@ -112,7 +112,7 @@ struct task {
int expire; /* next expiration date for this task, in ticks */
short nice; /* task prio from -1024 to +1024 */
short tid; /* TID where it's allowed to run, <0 if anywhere */
uint64_t call_date; /* date of the last task wakeup or call */
uint64_t wake_date; /* date of the last task wakeup */
uint64_t lat_time; /* total latency time experienced */
uint64_t cpu_time; /* total CPU time consumed */
};
@ -126,7 +126,7 @@ struct tasklet {
* list starts and this works because both are exclusive. Never ever
* reorder these fields without taking this into account!
*/
uint32_t call_date; /* date of the last tasklet wakeup or call */
uint32_t wake_date; /* date of the last tasklet wakeup */
int tid; /* TID of the tasklet owner, <0 if local */
};

10
include/haproxy/task.h
View File

@ -361,7 +361,7 @@ static inline void _tasklet_wakeup_on(struct tasklet *tl, int thr, const char *f
tl->debug.caller_line[tl->debug.caller_idx] = line;
#endif
if (_HA_ATOMIC_LOAD(&th_ctx->flags) & TH_FL_TASK_PROFILING)
tl->call_date = now_mono_time();
tl->wake_date = now_mono_time();
__tasklet_wakeup_on(tl, thr);
}
@ -414,7 +414,7 @@ static inline void _task_instant_wakeup(struct task *t, unsigned int f, const ch
t->debug.caller_line[t->debug.caller_idx] = line;
#endif
if (_HA_ATOMIC_LOAD(&th_ctx->flags) & TH_FL_TASK_PROFILING)
t->call_date = now_mono_time();
t->wake_date = now_mono_time();
__tasklet_wakeup_on((struct tasklet *)t, thr);
}
@ -448,7 +448,7 @@ static inline struct list *_tasklet_wakeup_after(struct list *head, struct taskl
tl->debug.caller_line[tl->debug.caller_idx] = line;
#endif
if (th_ctx->flags & TH_FL_TASK_PROFILING)
tl->call_date = now_mono_time();
tl->wake_date = now_mono_time();
return __tasklet_wakeup_after(head, tl);
}
@ -497,7 +497,7 @@ static inline struct task *task_init(struct task *t, int tid)
t->tid = tid;
t->nice = 0;
t->calls = 0;
t->call_date = 0;
t->wake_date = 0;
t->cpu_time = 0;
t->lat_time = 0;
t->expire = TICK_ETERNITY;
@ -517,7 +517,7 @@ static inline void tasklet_init(struct tasklet *t)
t->state = TASK_F_TASKLET;
t->process = NULL;
t->tid = -1;
t->call_date = 0;
t->wake_date = 0;
#ifdef DEBUG_TASK
t->debug.caller_idx = 0;
#endif

16
src/activity.c
View File

@ -855,8 +855,8 @@ static int cli_io_handler_show_tasks(struct appctx *appctx)
while (rqnode) {
t = eb32_entry(rqnode, struct task, rq);
entry = sched_activity_entry(tmp_activity, t->process);
if (t->call_date) {
lat = now_ns - t->call_date;
if (t->wake_date) {
lat = now_ns - t->wake_date;
if ((int64_t)lat > 0)
entry->lat_time += lat;
}
@ -872,8 +872,8 @@ static int cli_io_handler_show_tasks(struct appctx *appctx)
while (rqnode) {
t = eb32_entry(rqnode, struct task, rq);
entry = sched_activity_entry(tmp_activity, t->process);
if (t->call_date) {
lat = now_ns - t->call_date;
if (t->wake_date) {
lat = now_ns - t->wake_date;
if ((int64_t)lat > 0)
entry->lat_time += lat;
}
@ -885,8 +885,8 @@ static int cli_io_handler_show_tasks(struct appctx *appctx)
list_for_each_entry(tl, mt_list_to_list(&ha_thread_ctx[thr].shared_tasklet_list), list) {
t = (const struct task *)tl;
entry = sched_activity_entry(tmp_activity, t->process);
if (!TASK_IS_TASKLET(t) && t->call_date) {
lat = now_ns - t->call_date;
if (!TASK_IS_TASKLET(t) && t->wake_date) {
lat = now_ns - t->wake_date;
if ((int64_t)lat > 0)
entry->lat_time += lat;
}
@ -898,8 +898,8 @@ static int cli_io_handler_show_tasks(struct appctx *appctx)
list_for_each_entry(tl, &ha_thread_ctx[thr].tasklets[queue], list) {
t = (const struct task *)tl;
entry = sched_activity_entry(tmp_activity, t->process);
if (!TASK_IS_TASKLET(t) && t->call_date) {
lat = now_ns - t->call_date;
if (!TASK_IS_TASKLET(t) && t->wake_date) {
lat = now_ns - t->wake_date;
if ((int64_t)lat > 0)
entry->lat_time += lat;
}

4
src/debug.c
View File

@ -256,8 +256,8 @@ void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx)
"%p (task) calls=%u last=%llu%s\n",
task,
task->calls,
task->call_date ? (unsigned long long)(now_mono_time() - task->call_date) : 0,
task->call_date ? " ns ago" : "");
task->wake_date ? (unsigned long long)(now_mono_time() - task->wake_date) : 0,
task->wake_date ? " ns ago" : "");
chunk_appendf(buf, "%s fct=%p(", pfx, task->process);
resolve_sym_name(buf, NULL, task->process);

20
src/task.c
View File

@ -233,7 +233,7 @@ void __task_wakeup(struct task *t)
}
if (_HA_ATOMIC_LOAD(&th_ctx->flags) & TH_FL_TASK_PROFILING)
t->call_date = now_mono_time();
t->wake_date = now_mono_time();
eb32_insert(root, &t->rq);
@ -573,9 +573,9 @@ unsigned int run_tasks_from_lists(unsigned int budgets[])
profile_entry = sched_activity_entry(sched_activity, t->process);
before = now_mono_time();
if (((struct tasklet *)t)->call_date) {
HA_ATOMIC_ADD(&profile_entry->lat_time, (uint32_t)(before - ((struct tasklet *)t)->call_date));
((struct tasklet *)t)->call_date = 0;
if (((struct tasklet *)t)->wake_date) {
HA_ATOMIC_ADD(&profile_entry->lat_time, (uint32_t)(before - ((struct tasklet *)t)->wake_date));
((struct tasklet *)t)->wake_date = 0;
}
}
@ -627,12 +627,12 @@ unsigned int run_tasks_from_lists(unsigned int budgets[])
/* OK then this is a regular task */
_HA_ATOMIC_DEC(&ha_thread_ctx[tid].tasks_in_list);
if (unlikely(t->call_date)) {
if (unlikely(t->wake_date)) {
uint64_t now_ns = now_mono_time();
uint64_t lat = now_ns - t->call_date;
uint64_t lat = now_ns - t->wake_date;
t->lat_time += lat;
t->call_date = now_ns;
t->wake_date = now_ns;
profile_entry = sched_activity_entry(sched_activity, t->process);
HA_ATOMIC_ADD(&profile_entry->lat_time, lat);
HA_ATOMIC_INC(&profile_entry->calls);
@ -665,11 +665,11 @@ unsigned int run_tasks_from_lists(unsigned int budgets[])
* immediately, else we defer it into wait queue
*/
if (t != NULL) {
if (unlikely(t->call_date)) {
uint64_t cpu = now_mono_time() - t->call_date;
if (unlikely(t->wake_date)) {
uint64_t cpu = now_mono_time() - t->wake_date;
t->cpu_time += cpu;
t->call_date = 0;
t->wake_date = 0;
HA_ATOMIC_ADD(&profile_entry->cpu_time, cpu);
}