On Thu, Oct 13, 2022 at 6:29 PM Yosry Ahmed <yosryahmed@xxxxxxxxxx> wrote: > > On Thu, Oct 13, 2022 at 5:03 PM Yosry Ahmed <yosryahmed@xxxxxxxxxx> wrote: > > > > On Wed, Oct 12, 2022 at 8:07 PM John Stultz <jstultz@xxxxxxxxxx> wrote: > > > > > > On Wed, Oct 12, 2022 at 8:02 PM John Stultz <jstultz@xxxxxxxxxx> wrote: > > > > On Mon, Sep 26, 2022 at 2:18 PM Yosry Ahmed <yosryahmed@xxxxxxxxxx> wrote: > > > > So I think it reasonable to say its bounded by approximately 2 * > > > > NSEC_PER_SEC/HZ +/- 11%. > > > > > > Sorry, this should be 2*NSEC_PER_SEC/HZ * 0.11 > > > > Thanks so much for the detailed response :) > > > > IIUC this error bound is in ns. So on a 2 GHz cpu the bound is 0.11 ns > > (essentially 0)? I feel like I miscalculated, this error bound is too > > good to be true. > > Never mind, I thought HZ is the cpu speed for some reason. It's the > number of jiffies per second, right? Correct. > So if HZ is 1000, the error bound is actually ~2 ms, which is very > large considering that the unit is ns. Uh, for HZ=1000, I think it's closer to 220us, but yes, for HZ=100 2.2ms. thanks -john
