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Message-ID: <20070129222833.GB17330@elf.ucw.cz> Date: Mon, 29 Jan 2007 23:28:33 +0100 From: Pavel Machek <pavel@....cz> To: Alessandro Di Marco <dmr@....it> Cc: Vojtech Pavlik <vojtech@...e.cz>, linux-kernel@...r.kernel.org Subject: Re: [ANNOUNCE] System Inactivity Monitor v1.0 Hi! > The /proc/bus/input/devices has an extensible structure. You can just > add an "A:" line (for Activity) instead of adding a new proc file. > > I know, but IMO there is too much stuff to parse in there. Activity counters > are frequently accessed by daemons, and four or five concurrent daemons are the > norm in a typical X11 linux box... Syscalls are fast enough, and the file is _very_ easy (=> fast) to parse. > Also, the activity counters should IMO coincide with the event times > passed through /dev/input/event, and should not be jiffies based. > Ideally, both should be based on clock_gettime(CLOCK_MONOTONIC). > > In evdev.c do_gettimeofday() is used. Anyway I just need of a monotonic > counter, so get_jiffies_64() wouldn't be better? It isn't affected by wrapping > issues and it is probably faster than do_gtod(). Just use same time source rest of inputs already do... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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