VM Channel Path Activity Report

The VM Channel Path Activity report provides information about channel path usage.
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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 each channel path by path ID. For each ID, the type of path and the percent path usage is reported. If a path is offline, this is reported in place of the percent usage. The report can help detect bottlenecks in the I/O subsystem caused by excessive path utilization.
For systems using HiperSockets, detailed traffic information is provided in a separate section, at the end of the report.
Format
A tabular listing that contains one line of information for each active channel configured during the reporting period. In addition to the channel path ID, the following columns are shown on the report:
CHANNEL PATH ID
Hexadecimal number of the channel path identifier.
TYPE
Type of channel path.
SHR Y/N
An indication of whether a channel path is defined as shared between one or more logical partitions. YES indicates the channel path is shared.
UTILIZATION(%) PART
The channel path utilization percentage for the individual partition.
UTILIZATION(%) TOTAL
The channel path utilization percentage for the CPC.
UTILIZATION(%) BUS
Percentage of bus cycles, the bus has been found busy for this channel in relation to the theoretical limit.
READ (M/B SEC) PART
Transfer data rates from the control unit to the channel for this partition.
READ (M/B SEC) TOTAL
Transfer data rates from the control unit to the channel for the CPC.
WRITE (M/B SEC) PART
Transfer data rates from the channel to the control unit for this partition.
WRITE (M/B SEC) TOTAL
Transfer data rates from the channel to the control unit for the CPC.
FICON OPERATIONS RATE
FICON operations rate.
FICON OPERATIONS ACTIVE
Active FICON operations rate
FICON OPERATIONS DEFER
Deferred FICON operations rate.
ZHPF OPERATIONS RATE
zHPF operations rate.
ZHPF OPERATIONS ACTIVE
Active zHPF operations rate.
ZHPF OPERATIONS DEFER
Deferred Zhpf operations rate.
An example of this report is shown in the VM Channel Path Activity Report figure.
Inquiry ID
  • VMXLPA
Data Source (File/Timespan):
VMXCPM01 - DAYS
Data elements used
CHANNEL
- Physical Channel Address
CPMTYPE
- VM Channel Path Type
CPMCMG
- VM Channel Measurement Group
CPMECPMF
- VM Ext Channel Data Supported
CPMCPMF
- VM Channel Data Enabled
CPMSHRCT
- VM Channel Path Shared
CPMPCPBY
- VM Percent Channel Busy - LPAR
CPMPCPSY
- VM Percent Channel Busy - CPC
CPMPCBUS
- VM Percent Bus Busy
CPMPSPR
- VM FICON Read MB/Sec - LPAR
CPMPSTR
- VM FICON Read MB/Sec - CPC
CPMPSPW
- VM FICON Write MB/Sec - LPAR
CPMPSTW
- VM FICON Write MB/Sec - CPC
CPMPSHPW
- VM HiperSockets Write MB/Sec - LPAR
CPMPSPMS
- VM HiperSockets Message Sent Rate - LPAR
CPMPSHTW
- VM HiperSockets Write MB/Sec - CPC
CPMPSTMS
- VM HiperSockets Message Sent Rate - CPC
CPMHPMSZ
- VM HiperSockets Avg Message Size - LPAR
CPMHTMSZ
- VM HiperSockets Avg Message Size - CPC
CPMPSPUS
- VM HiperSockets Message Failed Rate - LPAR
CPMPSTUB
- VM HiperSockets Receive Failed Rate - CP
CPMPSPUB
- VM HiperSockets Receive Failed Rate - LPAR
Calculations
None
Usage considerations
None

VM Channel Path Activity Report Sample

C H A N N E L P A T H A C T I V I T Y R E P O R T Page nnn| z/VM System ID SYSA Start 20JULyy:23:59:45.92 Interval 1:00:00.00 Release V5R4 End 21JULyy:00:59:45.92 CPMF: Extended Mode CSSID: 0 --------------------------------------------------------------------------------------------------------------------------------- DETAILS FOR ALL CHANNELS --------------------------------------------------------------------------------------------------------------------------------- Channel Path Utilization(%) Read(MB/Sec) Write(MB/Sec) Ficon Operations zHPF Operations ID Type SHR Part Total Bus Part Total Part Total Rate Active Defer Rate Active Defer 05 FCS Y 32.54 32.54 8.76 35.81 35.81 34.24 34.24 894.03 6.11 0.00 4.76 1.64 0.00 06 FCS Y 32.62 32.62 8.80 35.66 35.66 34.76 34.76 894.98 6.08 0.00 4.74 1.63 0.00 07 FCS Y 32.66 32.66 8.79 35.62 35.62 34.67 34.67 893.64 6.23 0.00 4.84 1.66 0.00 08 FCS Y 32.72 32.72 8.80 35.69 35.69 34.69 34.69 893.89 6.27 0.00 4.83 1.61 0.00 0B FCS Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 | 0C FCS Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 | 10 OSX Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 11 OSX Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12 OSX Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 13 OSX Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 15 FCPTP 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 17 FCPTP 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 19 FCS Y 0.00 0.30 0.00 0.00 0.00 0.00 0.00 44.03 1.25 0.00 0.00 0.00 0.00 1A FC Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1B FC Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1D CFP Y 0.00 0.00 1E CFP Y 0.00 0.00 24 FCS Y 0.00 1.11 0.02 0.00 0.01 0.00 0.18 155.45 1.02 0.00 0.00 0.00 0.00 25 FCS Y 0.00 1.09 0.02 0.00 0.01 0.00 0.18 155.49 1.02 0.00 0.00 0.00 0.00 2C OSE Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 30 OSA/3270 Y 0.00 0.00 0.99 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3D OSD Y 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 FB IQD Y See Hipersocket Section of Report FC IQD Y See Hipersocket Section of Report FD IQD Y See Hipersocket Section of Report FE IQD Y See Hipersocket Section of Report --------------------------------------------------------------------------------------------------------------------------------- DETAILS FOR HIPERSOCKETS --------------------------------------------------------------------------------------------------------------------------------- Channel Path Write(B/Sec) Message Rate Message Size Send Fail Receive Fail ID Type SHR Part Total Part Total Part Total Part Part Total FB IQD Y 0 N/A 0 0 ------- ------- 0.00 0.00 0.00 FC IQD Y 0 N/A 0 0 ------- ------- 0.00 0.00 0.00 FD IQD Y 0 N/A 0 0 ------- ------- 0.00 0.00 0.00 FE IQD Y 0 N/A 0 0 ------- ------- 0.00 0.00 0.00