So this was done by "mis" design for some reason. You can save your company
quite a bit of
money by removing all the CPU/dedicate statements from your directory and
starting to use
2 IFLs instead of 1. You really should get a performance monitor, any decent
one would
have completely clarified this for you. Or pay for 2 more IFLs if you'd rather.
Ayer, Paul W wrote:
I am told (I'll have to get a copy of the vm profiles too)that for now
CPU 01 is the only CPU def in each of the Linux guest profiles. And
there is a dedicate statement too. So this leaves CPU 00 for VM.
so this was done by design for some reason.
I'm thinking that this is a waste also. Just wanted to see if there was
some reason I had not heard of for this.
We really have four IFL's on that system with only two turned on right
now, but I'm starting to look at ramping things up some.
Thanks for the info,
Paul
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
RPN01
Sent: Thursday, March 06, 2008 4:13 PM
To: LINUX-390@vm.marist.edu
Subject: Re: vm profile question
Z/VM's overhead is so little; I'd see no point in reserving an entire
engine
for it, unless you have a large CMS workload running beside your Linux
guests. Even then, both the CMS guests and the Linux guests could
benefit
from the use of both CPUs when the load of one or the other exceeds a
single
CPU. I see no compelling benefit from such a segregation.
My question is, how has this segregation been implemented? This isn't
the
way the system runs by default, and would likely run better for everyone
without the limitation.
--
Robert P. Nix Mayo Foundation .~.
RO-OE-5-55 200 First Street SW /V\
507-284-0844 Rochester, MN 55905 /( )\
----- ^^-^^
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
On 3/6/08 3:00 PM, "Ayer, Paul W" <[EMAIL PROTECTED]> wrote:
We have two IFL's defined to one of our systems.
Today via the profiles we have it set so that CPU 00 is used by only
VM,
and the Linux guests use only CPU 01 (really IFL's)
Does anyone else do this ... reserve a whole IFL for just VM?
Thanks,
Paul
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begin:vcard
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tel;work:650-964-8867
note:If you can't measure it, I'm just not interested
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