Messages in this thread | | | Date | Sat, 4 Mar 2006 08:15:10 +0100 | From | Ingo Molnar <> | Subject | Re: [RFC][PATCHSET] Time: Generic Timeofday Subsystem (v B20) |
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* john stultz <johnstul@us.ibm.com> wrote:
> Summary: > This patchset provides a generic timekeeping subsystem that is > independent of the timer interrupt. This allows for robust and correct > behavior in cases of late or lost ticks, avoids interpolation errors, > reduces duplication in arch specific code, and allows or assists > future changes such as high-res timers, dynamic ticks, or realtime > preemption. Additionally, it provides finer nanosecond resolution > values to the clock_gettime functions. > > Why do we need this?
i'd like to add the following to the list of reasons as well: the current -hrt patch-queue (high resolution timers, which enables true microsecond-level resolution for POSIX timers and nanosleep()), which is working pretty well in the -rt tree and implements an important feature for Linux, is based on the generic timekeeping subsystem as well.
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