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. Thanks, Ming
