Messages in this thread | | | Date | Thu, 19 Dec 2019 10:20:26 +0100 | From | Peter Zijlstra <> | Subject | Re: [RFC PATCH 1/3] sched/core: add API for exporting runqueue clock |
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On Thu, Dec 19, 2019 at 09:29:14AM +0800, Ming Lei wrote: > On Wed, Dec 18, 2019 at 10:51:01AM +0100, Peter Zijlstra wrote: > > On Wed, Dec 18, 2019 at 03:19:40PM +0800, Ming Lei wrote: > > > Scheduler runqueue maintains its own software clock that is periodically > > > synchronised with hardware. Export this clock so that it can be used > > > by interrupt flood detection for saving the cost of reading from hardware. > > > > But you don't have much, if any, guarantees the thing gets updated. > > Any software clock won't be guaranteed to be updated in time, however, > they are still useful.
It still is broken, and I really don't want to expose this for whatever reason.
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