Re: [PATCH] kernel/time: Feedback reply for hr_sleep syscall, a fine-grained sleep service

Marco! On Wed, Apr 07 2021 at 11:32, Marco Faltelli wrote: > Current sleep services (nanosleep) provide sleep periods very far from > the expectations when scheuling microsecond-scale timers. On our > testbed, using rdtscp() before and after a nanosleep() syscall to > measure the effective elapse

[PATCH] kernel/time: Feedback reply for hr_sleep syscall, a fine-grained sleep service

Current sleep services (nanosleep) provide sleep periods very far from the expectations when scheuling microsecond-scale timers. On our testbed, using rdtscp() before and after a nanosleep() syscall to measure the effective elapsed time with a 1us timer, we got ~59us. Even with larger timeout pe