On Friday, 07/23/2010 at 10:51 EDT, Ed Long <rdhm...@prodigy.net> wrote: > Hi everyone. > Back in April on the VM user group someone asked this very question. Here is > what they said: > *****BEGIN EXCERPT > Yes. Do CP DEDICATE USER <userid> CPU <cpuaddr>. Or add DEDICATE to the CPU > directory statement. > *****END EXCERPT > We will test whether this command forces the zLinux workload onto the IFL.
That isn't going to work, Ed. You can only dedicate *primary* CPUs, not secondaries. In a z/VM mode LPAR, the primary CPU type is CP. You need to use the SET VCONFIG and DEFINE CPU statements as previously discussed in this thread. The only time you can DEDICATE an IFL is when you are running in a LINUX mode LPAR with IFLs. See Usage Note #1 in the help for the CP DEDICATE command. Further, read that other post carefully. DEDICATE is how give an *entire* logical CPU to a *single* virtual machine, making it ineligible to be shared among all virtual machines. If the guest is idle, so will be the dedicated CPU. I view a dedicated CPU as the modern z/VM equivalent of the medieval flail: o It's use seems obvious to the casual observer, o The effect on the intended target is significant and easily observed, o In a crowded room there will be significant collateral damage, o In inexperienced hands, there is a good chance that the wielder will be injured. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
