On Fri, Apr 20, 2018 at 08:22:04AM +0200, Willy Tarreau wrote: > On Fri, Apr 20, 2018 at 09:11:47AM +0300, Slawa Olhovchenkov wrote: > > > Try 1.8.8, it contains the kqueue fix. > > > > Work (kqueue), nice! > > Excellent, thanks for your feedback!
Thank for fix! > > Average load same as for multiprocess, but load of distinct CPU from > > 0.06 to 0.39. Is this normal or expected? > > It can depend on your workload. There is *always* a small overhead > incured by thread synchronization that doesn't exist between processes, > but the ability to share certain elements can sometimes be beneficial > as well (eg: shared cache in CPU). Hmm, may be I am nor clean. In process mode all 8 CPU have load 0.18. In thread mode summary average load still about 0.18, but distinct CPU load now different: 0: 0.13 1: 0.15 2: 0.07 3: 0.40 4: 0.23 5: 0.33 6: 0.16 7: 0.15 Average (0.20) is about same as 0.18 (rised by more users now) > If you run at high connection rates (tens of connections per second) on > 8+ threads, the cost of locking starts to be quite visible. That's where > we know that threads scale less than processes (and what we're improving > in 1.9). But the as long as you have some idle time, threads are much more > convenient to use (single stats, checks, tables etc) and should be preferred. connection rate 1900/s session rate 1900/s request rate 5200/s
