+tech-kern > On Aug 26, 2025, at 4:29 PM, John Klos <[email protected]> wrote: > > Hi, > > I've noticed this behavior happening sometimes in the past, where processes > and their children sometimes don't use both CPUs in a dual processor > AlphaServer DS25. Both processors could be used by running multiple different > things, usually. > > On 10.1_STABLE from mid June 2025, it seems there is no occasional stuff on > both CPUs. Running two totally separate sets of tasks, I see: > > load averages: 5.99, 5.94, 5.89; up 66+08:59:48 23:19: > 78 processes: 6 runnable, 54 sleeping, 17 stopped, 1 on CPU > CPU: 0.0% user, 47.0% nice, 3.0% system, 0.1% interrupt, 49.8% idle > Memory: 5276M Act, 3033M Inact, 14M Wired, 184M Exec, 7003M File, 941M Fr > Swap: 24G Total, 16M Used, 24G Free / Pools: 2774M Used / Network: 20K In > > PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMA > 446 root 23 4 111M 92M RUN/0 0:23 16.27% 16.26% cc1pl > 1325 root 23 4 122M 97M RUN/0 0:22 14.90% 14.89% cc1pl > 2260 root 23 4 137M 120M RUN/0 1:37 14.84% 14.84% cc1pl > 9123 root 24 4 170M 153M RUN/0 0:12 15.10% 14.79% cc1pl > 28331 root 23 4 148M 129M RUN/0 0:08 15.12% 14.16% cc1pl > 21158 root 24 4 118M 96M RUN/0 0:05 15.17% 12.11% cc1pl > 0 root 124 0 0K 1693M syncer/0 71.1H 0.00% 0.00% [syst > 2386 john 85 0 12M 6096K kqueue/1 89:14 0.00% 0.00% tmux > > > I can force everything to the other CPU with cpuctl offline 0. I can force > them back. I can move everything to processor 1, then psrset -u one of the > processes, and it will run on processor 0 to completion, but I have no idea > why processes won't run on both processors automatically. > > Anyone? > > Thanks, > John
-- thorpej
