Amaury Denoyelle 22bd92a87f MINOR: mux-quic: use sched call time for pacing ... QUIC pacing was recently implemented to limit burst and improve overall bandwidth. This is used only for MUX STREAM emission. Pacing requires nanosecond resolution. As such, it used now_cpu_time() which relies on clock_gettime() syscall. The usage of clock_gettime() has several drawbacks : * it is a syscall and thus requires a context-switch which may hurt performance * it is not be available on all systems * timestamp is retrieved multiple times during a single task execution, thus yielding different values which may tamper pacing calculation Improve this by using task_mono_time() instead. This returns task call time from the scheduler thread context. It requires the flag TASK_F_WANTS_TIME on QUIC MUX tasklet to force the scheduler to update call time with now_mono_time(). This solves every limitations listed above : * syscall invokation is only performed once before tasklet execution, thus reducing context-switch impact * on non compatible system, a millisecond timer is used as a fallback which should ensure that pacing works decently for them * timer value is now guaranteed to be fixed duing task execution		2024-11-25 11:21:45 +01:00
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haproxy	MINOR: mux-quic: use sched call time for pacing	2024-11-25 11:21:45 +01:00
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make	BUILD: makefile: make ERR apply to build options as well	2024-11-20 14:58:35 +01:00