Figured out my problem. I was using the CPU clock, and that has ~6ms granularity when used with the timer, I'm guessing it doesn't fire until the task is preempted and the CPU time tallied up.
On Tue, Jul 16, 2019 at 13:38 Ben Noordhuis <i...@bnoordhuis.nl> wrote: > On Tue, Jul 16, 2019 at 2:29 PM Jaka Jančar <j...@kubje.org> wrote: > > > > On the motivation: I have user-provided (synchronous, relatively simple) > snippets of code that run 1k+ times/second on a server and must execute > very predictably and fast or they can affect the rest of the system/users. > > > > I'm using timer_create() with SIGEV_THREAD indeed (so not really > managing my own thread). Perhaps SIGEV_THREAD_ID would be faster, because > there is no scheduling/switching between two threads involved, but I was > under the impression that functions need to be async-signal-safe for that > as well, just as for SIGEV_SIGNAL. Can you explain why you think that is > not the case? > > With SIGEV_THREAD_ID you can just block the signal with > pthread_sigmask() and then wait race-free for delivery with > sigwaitinfo(). > > Having said that, unless there are other reasons to use timer_create() > or signals, it's probably easier to suspend with nanosleep() or > clock_nanosleep(). > > -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to a topic in the > Google Groups "v8-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/v8-users/UcipYq1pJJE/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > v8-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-users/CAHQurc_7CwTdkvzTVCmHFP6xRa2%2B3E-xoftcbXCq6hbyz3GKvQ%40mail.gmail.com > . > For more options, visit https://groups.google.com/d/optout. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CAMUPXmpKaPGGSh35%3DJVnBcgTdq0GyRhAX7roO5SH4mHA9sK7Jw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
