Since its first appearance, at the SMF manual (SA22-7630-18, Oct/2008, for z/OS-1.10), until the last version of the manual for the z/OS-1.13 (SA22-7630-26, Sep/2012), the description of the SMF record type "113" (CPUMF) has the following opening phrase:
"The system writes record type 113 to record hardware capacity, reporting, and statistics for IBM System z10™ or later machines."
Afterwards, for all the z/OS-2.1 versions (SA38-0667-xx), the opening phrase is now:
"The system writes record type 113 to record hardware capacity, reporting, and statistics for IBM System z10™ or later machines. With the Extended Monitor Facility released with the IBM z196, the SMF record can be utilized to capture software events."
I ran through all the MVS manuals, the z196 and zEC12 technical guides (redbooks), the CPUMF manuals/documentation and the IBM Web site for the expression "Extended Monitor Facility" without any results.
Does anybody has any idea what is "Extended Monitor Facility"? (only available at z196, or available begining with the z196)
Joined: 06 Jun 2008 Posts: 8417 Location: Dubuque, Iowa, USA
There is a reference to the System Commands manual in the manual you cited in your post. In that reference, I find
Setting up hardware event data collection
z/OS MVS System Commands
Hardware instrumentation services (HIS) is a function that collects hardware event data for IBM® System z10™ or later machines.
Before you start the HIS data collection, you may first need to authorize to the sampling facilities and counter set types you want to use through the support element (SE) console. For information about how to set up the authorization of the sampling facilities and counter sets, see Support Element Operations Guide for System z10 machine on the Resource Link home page.
Start of change In addition, with the enhanced-monitor facility hardware released with z196 machines, the HIS function expands into a z/OS software event data collector that will be used by IBM for improved problem analysis. The z/OS event counters are viewed as an additional hardware counter set, and there is no authorization required to use the hardware. End of change
You might want to look at "enhanced-monitor" or "enhanced monitor" -- when I Googled "enhanced-monitor" z196 I found
z/OS Software Counters from HIS
The Enhanced Monitor Facility (EMF) introduced on z196
turns a monitor class into a “software driven counting facility”
z/OS uses this to count specific software events. For example:
• Number of times a particular SVC is issued
• Number of times a task or SRB is dispatched
• Number of times a particular lock is obtained
Because of the use of Monitor Call to request counting, the overhead
is near zero when not activate.
Because of EMF, the overhead is very low even when counting is
software event active.
• HIS encapsulates these counts as the ZOS Counter Set
The HIS Profiler writes to the .CNT file and SMF Type 113 record,
when requested via CTRSET=(ZOS).
Currently, what each counter means is IBM internal only
Robert, thanks for your hint!
I was looking for "Extended Monitor Facility" (as mentioned in the SMF manual), but the correct name and/or the most used one (as mentioned in your posting) is "Enhanced Monitor Facility".