How do I see zIIP statistics for the SSI region?

Document ID : KB000052444
Last Modified Date : 14/02/2018
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Description:

When the proper parameters are coded in the SSIPARM, five zIIP message types are written to the SSI log.

Here are explanations of the five types of records:

Message ID ...+ NF0710

Message Text

CPU: ~P1 API: ~P2 PKTS: ~P3 EVT: ~P4 SMF: ~P5 UUID: ~P6 TRC: ~P7

Message Explanation

This message is issued to the NMSSI log if the Packet Analyzer minute minder is activated. The message appears once every minute and provides statistics for the last minute.

The fields are as follows:

CPU: P1 is the CPU time used in seconds.
API: P2 is the number of database API requests received.
PKTS: P3 is the number of TCP/IP packets received.
EVT: P4 is the number of events received.
SMF: P5 is the number of SMF events received.
UUID: P6 is the number of update-userid requests received.
TRC: P7 is the number of TCP/IP packets truncated because of segmentation constraints.

Message ID ...+ NF0711

Message Text

DDB-U: ~1% SDB-U: ~2% TDB-U: ~3%

Message Explanation

This message is issued to the NMSSI log if the Packet Analyzer minute minder is activated. The message is produced once every minute and provides statistics for the last minute.

The fields are as follows:

DDB-U: 1% The percentage-used for the dynamic database
SDB-U: 2% The percentage-used for the synchronous database
TDB-U: 3% The percentage-used for the trace database

Message ID ...+ NF0712

Message Text

D/C: NQ: ~1 DQ: ~2 LS: ~3 AW: ~4 TW: ~5 ST: ~6 (%): ~7

Message Explanation

This message is issued to the NMSSI log if the Packet Analyzer minute minder is activated. The message is produced once every minute and provides statistics for the last minute.

The statistics in this message relate to the decoupler, used to buffer TCP/IP packets and other events for processing.

The fields are as follows:

NQ: 1 The number of records enqueued to the decoupler
DQ: 2 The number of records dequeued from the decoupler
LS: 3 The number of records lost to buffer shortages
AW: 4 The number of actual waits for data
AT: 5 The number of timed waits for data
ST: 6 The number of decoupler segments touched
(%): 7 The percentage of decoupler segments touched, of the entire amount of decoupler segments

Message ID ...+ NF0713

Message Text

S/T CPU: ~1 TASK: ~2 (~3%) SRB: ~4 (~5%) M-SW: ~6

Message Explanation

This message is issued to the NMSSI log if the Packet Analyzer minute minder is activated. The message is produced once every minute and provides statistics for the last minute.

This specific message is produced only if the Packet Analyzer execution mode is ZIIP. The statistics in this message show the CPU time used by the Packet Analyzer, with a breakup between the time spent in Task mode and the time spent in SRB mode (which may be expended on a zIIP).

The fields are as follows:

CPU: 1 The total CPU time used by the Packet Analyzer
TASK: 2 (3%) The CPU time and percentage of the total spent in Task mode
SRB: 4 (5%) The CPU time and percentage of the total spent in SRB mode
M-SW: 6 The number of mode switches between Task and SRB mode

Message ID ...+ NF0714

Message Text

PHTM: ~1 ZONC: ~2 ZNCT: ~3 %-ZIIP: ~4

Message Explanation

This message is issued to the NMSSI log if the Packet Analyzer minute minder is activated. The message is produced once every minute and provides statistics for the last minute.

This specific message is produced only if the Packet Analyzer execution mode is zIIP. The statistics in this message show the CPU time used as derived from operating system-maintained fields. These values can be used to determine whether zIIP-eligible processing is actually being performed on a zIIP.

The fields are as follows:

PHTM: 1 The total pre-emptable-SRB CPU time expended in the last minute
ZONC: 2 CPU time that, while zIIP-eligible, was expended on a normal CP
ZNCT: 3 Enclave CPU time executed on a zIIP
%-ZIIP: 4 The percentage of zIIP-eligible CPU time actually executed On a zIIP.

Solution:

For the SSI region, you will need to code paexmode=ziip and pdebug=+80 in the SSIPARM.