On Mon, Jul 29, 2019 at 11:57 PM Valdis Klētnieks <valdis.kletnieks@xxxxxx> wrote: > > On Mon, 29 Jul 2019 22:48:57 +0530, Muni Sekhar said: > > Let us assume that multiple processes are waiting on wait_event()\ > > wait_event_interruptible()\ wait_event_interruptible_timeout(), which > > process gets woken up on calling wake_up()?? > > > > I presume wake_up() picks one process, but is there any algorithm to > > pick which process? > > Hint: If you have more than one process waiting, and they do the same thing > (think multiple copies of the same kthread), it probably doesn't matter. > > If they do different things and which one gets picked matters for correctness, > you're doing it wrong and probably need some locking. > > If they do different things and the results will be correct no matter which > order they're picked, but you want one to go first for latency/througput > considerations, you have a scheduling/priority issue and probably need to fix > it using the vast plethora of knobs and tools available for that purpose. What are those tools? Can you give some more details on how to fix latency/throughput issues using those tools.. > -- Thanks, Sekhar _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
