On Fri, Apr 16, 2021 at 1:47 AM Thomas Gleixner <t...@linutronix.de> wrote: > Enable tracing and enable the following tracepoints: > [...]
Sorry for the delay. I had to learn a bit about how to use the tracing infrastructure. I don't know if I can post here, but to my untrained eye, one big difference between the old (fast) code and the new (slow) code is that the new code calls tick_program_event() much more. It looks like that makes most of the difference. With the old code, hrtimer_start_range_ns almost never calls tick_program_event at all, but the new code seems to call it twice on every timer update.
