3. REPORTS › 3.2 MICF Inquiries › 3.2.1 VM MICF Inquiry Descriptions › 3.2.1.2 VM Performance Analysis Inquiries › 3.2.1.2.9 VM FICON Channel Path Load Analysis
3.2.1.2.9 VM FICON Channel Path Load Analysis
The VM FICON Channel Path Load Analysis report provides
information about FICON channels. Only channels for which
"busy" conditions occur are included. Channel paths provide
the interface that allows for control units and I/O devices
to be physically connected to the I/O subsystem.
INTENDED USE:
The report is designed to help analyze FICONS channels by
path ID. For each ID, percent channel utilization for the
partition and total for the system can be analyzed to help
detect bottlenecks in the I/O subsystem caused by excessive
path utilization.
FORMAT:
A tabular listing that contains one line of information
for each active channel configured during the reporting
period. Report is ordered by channel path ID. In addition
to the channel path ID, the following columns are shown on
the report:
CHPID - Hexadecimal number of the channel path
identifier.
SHRD - Indicator for the channel which can be either
YES for channels shared with other logical
partitions, or NO for channels dedicated to this
logical partition.
FICON CHANNEL UTILIZATION %: The following fields
show the relative utilization of resources compared
to the maximum value, in percent.
TOTAL FOR SYSTEM:
BUS CYCLE T_BCY - The bus cycles utilization for the
whole system.
WORK UNITS T_WUN - The work units utilization for the
whole system.
DATA UNITS WRITE T_DUW - The data units write
utilization for the whole system.
DATA UNITS READ T_DUR - The data units read
utilization for the whole system.
OWN PARTITION:
WORK UNITS L_WUN - The work units utilization for the
own logical partition.
DATA UNITS WRITE L_DUW - The data units write
utilization for the own logical partition.
DATA UNIT READ L_DUR - The data units read
utilization for the own logical partition.
TOTAL DATA TRANSFER RATE (BYTES/S):
WRITES/S - The total number of bytes written per
second for the whole system.
READ/S - The total number of bytes read per second
for the whole system.
An example of this report is shown in Figure 3-23.
INQUIRY ID:
VMXLS2
DATA SOURCE (File/Timespan):
VMXCPM01 - DETAIL
DATA ELEMENTS USED:
CHANNEL - Physical Channel Address
CPMTYPE - VM Channel Path Type
CPMCMG - VM Channel Measurement Group
CPMCMMQ - VM Channel Model Group Qualifier
CPMPCPSY - VM Percent Channel Busy - CPC
CPMCBCCT - VM Total Bus Cycles Count
CPMSHRCT - VM Channel Path Shared
CPMCPINT - VM Channel Path Interval Time
CPMCWUT - VM FICON Channel Work Unit Count - CPC
CPMTDUW - VM FICON Write Data Unit Count - CPC
CPMTDUR - VM FICON Read Data Unit Count - CPC
CPMCWUL - VM FICON Channel Work Unit Count - LPAR
CPMLDUW - VM FICON Write Data Unit Count - LPAR
CPMLDUR - VM FICON Read Data Unit Count - LPAR
CPMMXIBC - VM Max FICON Internal Bus Cycles Per Second
CPMMXUNP - VM Max FICON Channel Work Units Per Second
CPMMXUNW - VM Max FICON Write Data Units Per Second
CPMMXUNR - VM Max FICON Read Data Units Per Second
CPMDUS - VM FICON Data Unit Size
CALCULATIONS:
Percent average total internal bus cycle utilization:
T_BCY=(CPMCBCCT*100)/CPMMXIBC/CPMCPINT;
Percent average total channel work units utilization:
T_WUN=(CPMCWUT*100)/CPMMXUNP/CPMCPINT;
Percent average total data unit writes utilization:
T_DUW=(CPMTDUW*100)/CPMMXUNW/CPMCPINT;
Percent average total data unit reads utilization:
T_DUR=(CPMTDUR*100)/CPMMXUNR/CPMCPINT;
Percent average logical channel work unit utilization
for the partition:
L_WUN=(CPMCWUL*100)/CPMMXUNP/CPMCPINT;
Percent average logical channel data unit writes
utilization for the partition:
L_DUW=(CPMLDUW*100)/CPMMXUNW/CPMCPINT;
Percent average logical channel data unit reads
utillization for the partition:
L_DUR=(CPMLDUR*100)/CPMMXUNR/CPMCPINT;
Average total bytes written per second:
WRITES=ROUND((CPMTDUW*CPMDUS)/CPMCPINT);
Average total bytes read per second:
READS=ROUND((CPMTDUR*CPMDUS)/CPMCPINT);
USAGE CONSIDERATIONS:
None
| F I C O N C H A N N E L L O A D A N A L Y S I S R E P O R T
| Page 001 |
| z/VM System ID SYSA Start 20JULyy:23:52:45.92 |
| Release V5R4 End 20JULyy:23:59:45.92 |
| CPMF: Extended Mode CSSID: 0 |
|--------------------------------------------------------------------------------------------------------------------|
| <------------------ FICON Channel Utilization % -----------------> |
| <--------- Total for System ---------> <---- Own Partition -----> <--- Total Data ---> |
|Channel Bus Work <- Data Units -> Work <- Data Units -> <-- Transfer Rate --> |
|Path Cycle Units Write Read Units Write Read <---- (Bytes/s) ----> |
|ID Shared T_Bcy T_WUn T_DUW T_DUR L_WUn L_DUW L_DUR Writes/s Reads/s |
|0A YES 0 0 0 0 0 0 0 725 7085 |
|0B YES 0 0 0 0 0 0 0 436 0 |
|0C YES 0 0 0 0 0 0 0 284 0 |
|0D YES 0 0 0 0 0 0 0 0 0 |
|00 YES 0 0 0 0 0 0 0 0 1877 |
|01 YES 0 0 0 0 0 0 0 52744 11940 |
|02 YES 0 0 0 0 0 0 0 7957 10867 |
|03 YES 0 0 0 0 0 0 0 0 1877 |
|04 YES 0 0 0 0 0 0 0 0 1877 |
|05 YES 0 0 0 0 0 0 0 0 0 |
|06 YES 0 0 0 0 0 0 0 0 269 |
|07 YES 0 0 0 0 0 0 0 0 0 |
|08 YES 0 0 0 0 0 0 0 0 269 |
|09 YES 0 0 0 0 0 0 0 0 1877 |
|10 YES 0 0 0 0 0 0 0 0 1877 |
|11 YES 0 0 0 0 0 0 0 0 1877 |
|12 YES 0 0 0 0 0 0 0 0 1877 |
|13 YES 0 1 0 0 0 0 0 100670 283112 |
|14 YES 0 2 0 0 0 0 0 0 1876 |
|15 YES 0 0 0 0 0 0 0 0 0 |
|16 YES 0 0 0 0 0 0 0 0 0 |
|17 YES 0 0 0 0 0 0 0 10 7245 |
|18 YES 0 0 0 0 0 0 0 0 0 |
|2A YES 0 0 0 0 0 0 0 0 0 |
|2B YES 5 23 2 14 1 0 0 3323764 28138817 |
|2C YES 0 0 0 0 0 0 0 0 0 |
|2D YES 1 7 1 1 1 0 0 1522803 2455957 |
|2E YES 0 0 0 0 0 0 0 0 27 |
|20 YES 1 12 1 1 0 0 0 1441894 1462888 |
|21 YES 1 7 1 0 0 0 0 2481329 524871 |
|22 YES 1 7 1 0 0 0 0 2523201 498375 |
|
|
Figure 3-23. VM FICON Channel Path Load Analysis
