2010/6/6 Arjan van de Ven <arjan@xxxxxxxxxxxxx>: > On Sat, 5 Jun 2010 14:26:14 -0700 > Arve Hjønnevåg <arve@xxxxxxxxxxx> wrote: >> > the kernel has a set of infrastructure already to help here (range >> > timers, with which you can wakeup-limit untrusted userspace crap), >> > timer slack for legacy background timers, etc etc. >> >> Range timers allows the kernel to align different timers so they don't >> each bring the cpu out of idle individually. They do not eliminate >> timers or make individual timers fire less often. > > you're incorrect. > With range timers you can control the rate at which timers fire just > fine. I was wondering... Currently GLib user-space aligns itself to fire burst of work at second boundaries without the need for IPC. But if you want to align beyond one second you need multi-process alignment. Say, one application says: wake me up between 30s and 1m. And the other one says: wake me up between 10m and 20m. They could very well align at some point if there was a central process keeping track of all the timers. Does the kernel provide something to solve that problem already? -- Felipe Contreras -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
