RE: zIIP processor (ENGINE type IP)

 

A DM=CPU should tell the story.

RESPONSE=SYSA                        

 IEE174I 17.41.47 DISPLAY M 535      

 PROCESSOR STATUS                    

 ID  CPU                  SERIAL    

 00  +                     0XXXXX2098

 01  +                     0XXXXX 2098

 02  +                     0XXXXX 2098

 03  +A                    0XXXXX 2098

 04  +I                    0XXXXX 2098

Serial number Xed out : - )

 

In this  case processor 3 is zAAP and 4 is zIIP.  

 

If the D M=CPU under Hercules doesn't show these as the correct
processor types the results would be as seen.

 

Dave

 

From: hercules-390@... [mailto:hercules-390@...]
On Behalf Of Dave Wade
Sent: Monday, June 22, 2009 3:33 PM
To: hercules-390@...
Subject: RE: [hercules-390] zIIP processor (ENGINE type IP)

 






>-----Original Message-----
>From: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
[mailto:hercules-390@...
<mailto:hercules-390%40yahoogroups.com> ] On
>Behalf Of David Kreiss
>Sent: 22 June 2009 23:23
>To: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
>Subject: RE: [hercules-390] zIIP processor (ENGINE type IP)
>
>This is a WLM thing. Time spent on a specialty processor is recorded
>in SMF type 30 in special fields for zIIP and zAAP. And the 4 hour
>rolling MSU for CP (reported in SCRT) is reduced by time spent on
>specialty processors since it time not running on a general processor.

I wonder if Hercules isn't reporting speciality processors properly if
this
is wrong...

>I didn't realize that you could specify specialty processors but of
>course that makes sense, the Hercules developers are on the ball...

The differences are pretty minor....

>Dave

From: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
[mailto:hercules-390@...
<mailto:hercules-390%40yahoogroups.com> ]
On Behalf Of Dave Wade
Sent: Monday, June 22, 2009 3:11 PM
To: hercules-390@... <mailto:hercules-390%40yahoogroups.com>

Subject: RE: [hercules-390] zIIP processor (ENGINE type IP)

>-----Original Message-----
>From: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
<mailto:hercules-390%40yahoogroups.com>
[mailto:hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
<mailto:hercules-390%40yahoogroups.com> ] On
>Behalf Of David Kreiss
>Sent: 22 June 2009 21:34
>To: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
<mailto:hercules-390%40yahoogroups.com>
>Subject: RE: [hercules-390] zIIP processor (ENGINE type IP)
>
>The amount of time a process [1] that can run on a zIIP or zAAP is
>called eligible time. If there are any zIIP or zAAP processors and the
>dispatcher can dispatch this eligible time on those processors than any
>time spent running work on those processors is not part of chargeable
>CPU time.

What decides what is charged? Is this an integrated part of zOS or
something
recorded in the HMC ...

> So not only is eligibility important but also the
>availability of the specialty [2] processors important. Another key
>factor is that specialty processors always run at full speed (won't
>matter on a Hercules emulation). So a CPU bound process on a regular
>processor can run faster (use less CPU time) on a specialty processor.
>
>I suspect Hercules doesn't have a way to define a processor of a zIIP
or
>zAAP type.
>

http://www.hercules-390.org/hercconf.html#ENGINES

>Dave
>
>
>1 -task mode is JAVA/XML work is zAAP eligible and enclave SRB work is
>zIIP eligible
>
>2 - zIIP or zAAP processor
>
>

From: hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
<mailto:hercules-390%40yahoogroups.com>
[mailto:hercules-390@...
<mailto:hercules-390%40yahoogroups.com>
<mailto:hercules-390%40yahoogroups.com> ]
On Behalf Of Fish
Sent: Monday, June 22, 2009 1:19 PM
To: Hercules-390
Subject: [hercules-390] zIIP processor (ENGINE type IP)

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I have a question about how cpu-types are implemented in Hercules.

I'm told that if a certain workload (or program or process or
whatever terminology you prefer) is run on a real box without any
zIIPs, the workload is "charged" the full amount (say 50 minutes).
When run on a real box with a zIIP however, it is "charged" only .2
minutes of processor time. They tell me this is because the bulk of
their workload is designed to run on the zIIP processor which is
"free" (or something like that; I'm not all that familiar with it).

When they run the same program on Hercules with a zIIP defined
however (e.g. ENGINES 7*CP,IP), they're being "charged" the full 50
minutes, and they'd like to know why.

Does anyone know what they're referring to and more importantly, can
anyone explain WHY this happens under Hercules? They would like the
"chargeable time" their program uses when run on Hercules with a zIIP
defined to be the same .2 minutes as when the same program is run on
a real box. How do they do that? What are they doing wrong? Or is
Hercules doing something wrong? If so, what?

Thanks in advance for any insight anyone can provide.

- --
"Fish" (David B. Trout) - fish@...
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