----- On Aug 27, 2021, at 7:23 PM, Sean Christopherson sea...@google.com wrote:
> On Fri, Aug 27, 2021, Mathieu Desnoyers wrote: [...] >> Does it reproduce if we randomize the delay to have it picked randomly from >> 0us >> to 100us (with 1us step) ? It would remove a lot of the needs for >> arch-specific >> magic delay value. > > My less-than-scientific testing shows that it can reproduce at delays up to > ~500us, > but above ~10us the reproducibility starts to drop. The bug still reproduces > reliably, it just takes more iterations, and obviously the test runs a bit > slower. > > Any objection to using a 1-10us delay, e.g. a simple usleep((i % 10) + 1)? Works for me, thanks! Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
