As far as I know, pcpu has never worked for limiting beyond a single core. I
submitted a patch for kern/kern_racct.c that should fix it:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=189870
Please update the bug if it does or doesn't resolve the issue. Maybe that will
prompt a committer to apply it to stable.
- .Dustin
>
> Anyone can advise me please?
> Thanks!
> From: John Dison via freebsd-stable <freebsd-stable at freebsd.org>
> To: "stable at freebsd.org" <stable at freebsd.org>
> Sent: Tuesday, September 15, 2015 1:00 PM
> Subject: Question about "pcpu" rctl
>
> Hello and have a nice day!
>
> I try to limit cpu usage for multi-threaded process on a multi-core machine.
> I use the following command:
> # rctl -a user:myusernm:pcpu:deny=200/user
> And I expect (please correct me if I am wrong) that all processes running
> with uid=myusernm will consume 200% of CPU in total.
> But after that I see that multi-threaded process continues to consume all
> available cores on my machine.
> rctl command reports:# rctluser:myusernm:pcpu:deny=200
> What am I doing wrong?
>
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