On Thu, Mar 22, 2018 at 12:32:18PM -0400, Rik van Riel wrote: > On Wed, 2018-03-14 at 13:04 +0100, Peter Zijlstra wrote: > > > On x86 we don't have to use that time_check_counter thing, > > sched_clock() > > is really cheap, not sure if it makes sense on other platforms. > > Are you sure? I saw a 5-10% increase in CPU use, > for a constant query rate to a memcache style > workload, with v3 of this patch.
Well, I expected it to be really cheap, but if you have numbers saying otherwise, clearly I'll need to adjust expectations ;-)
