Question about "pcpu" rctl

[John Dison]

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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