Willy Tarreau c5052bad8a MINOR: sched: add TASK_F_WANTS_TIME to make the scheduler update the call date ...

Currently tasks being profiled have th_ctx->sched_call_date set to the
current nanosecond in monotonic time. But there's no other way to have
this, despite the scheduler being capable of it. Let's just declare a
new task flag, TASK_F_WANTS_TIME, that makes the scheduler take the time
just before calling the handler. This way, a task that needs nanosecond
resolution on the call date will be able to be called with an up-to-date
date without having to abuse now_mono_time() if not needed. In addition,
if CLOCK_MONOTONIC is not supported (now_mono_time() always returns 0),
the date is set to the most recently known now_ns, which is guaranteed
to be atomic and is only updated once per poll loop.

This date can be more conveniently retrieved using task_mono_time().

This can be useful, e.g. for pacing. The code was slightly adjusted so
as to merge the common parts between the profiling case and this one.

2024-11-19 20:13:41 +01:00

..

haproxy

MINOR: sched: add TASK_F_WANTS_TIME to make the scheduler update the call date

2024-11-19 20:13:41 +01:00

import

BUILD: import/mt_list: support building with TCC

2024-11-05 15:43:17 +01:00

make

BUILD: makefile: support USE_xxx=0 as well

2024-04-11 11:06:19 +02:00