On Sat, 2006-07-29 at 17:43 -0400, Neil Horman wrote: > Sure, an mmaped jiffy counter would certainly be usefull. I think the only > thing left to be determined in this thread is if adding mmap to the rtc driver > has any merit regardless of any potential users (iow, would current users of > /dev/rtc find it helpful to have the rtc driver provide an mmap interface.) A jiffy counter is sufficient for the X server; all I need is some indication that time has passed with a resolution of 10 to 20 ms. I check this after each X request is processed as that is the scheduling granularity. An X request can range in time from .1us to 100 seconds, so I really want to just check after each request rather than attempt some heuristic. -- [email protected]
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