VM HiperSocket Channel Activity Report

The VM HiperSockets Channel Activity report provides information about HiperSocket channels.
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Only channels for which "busy" conditions occur are included. HiperSockets is a program that has the ability not only to directly communicate with a program running within the same logical partition (LP), but also to communicate across any logical partition within the same CPC.
Intended use
The report is designed to help analyze HiperSocket channels by path ID. For each ID, HiperSocket activity per second 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.
HIPERSOCKET ACTIVITY/SEC:
TOTAL FOR SYSTEM:
TRANSFERRED T_MSGS
The number of messages sent per second for the whole system.
TRANSFERRED T_DUNITS
The number of data units per second for the whole system.
FAILED T_NOBUFF
The number of sends per second that failed due to unavailable receive buffers, for the whole system.
OWN PARTITION:
TRANSFERRED L_MSGS
The number of messages sent per second by programs in the own partition.
TRANSFERRED L_DUNITS
The number of data units per second for the own partition.
FAILED L_NOBUFF
The number of sends per second that failed due to unavailable receive buffers, for the own partition.
FAILED L_OTHER
The number of sends per second that failed due to other problems, for the own partition.
An example of this report is shown in the VM HiperSocket Channel Activity Report figure.
Inquiry ID
  • VMXLS3
Data Source (File/Timespan):
VMXCPM01 - DETAIL
Data elements used
CHANNEL
- Physical Channel Address
CPMTYPE
- VM Channel Path Type
CPMCMG
- VM Channel Measurement Group
CPMPSTMS
- VM HiperSockets Message Sent Rate - CPC
CPMPSTUB
- VM HiperSockets Receive Failed Rate - CPC
CPMPSPMS
- VM HiperSockets Message Sent Rate - LPAR
CPMPSPUB
- VM HiperSockets Receive Failed Rate - LPAR
CPMPSPUS
- VM HiperSockets Message Failed Rate - LPAR
CPMHDUST
- VM HiperSockets Data Units Sent - CPC
CPMHDUSL
- VM HiperSockets Data Units Sent - LPAR
Calculations
Average total data units sent per second for the CPC:
T_DUNITS ROUND(CPMHDUST/CPMCPINT);
Average data units sent per second for the LPAR:
L_DUNITS ROUND(CPMHDUSL/CPMCPINT);
Usage considerations
None

VM HiperSocket Channel Activity Report Sample

+----------------------------------------------------------------------------------------------------------------------------------+ | C H A N N E L P A T H L O A D A N A L Y S I S R E P O R T | | Page nnn| | z/VM System ID SYSC Start 20JULyy:23:59:45.92 | | Release V5R4 End 21JULyy:00:59:45.92 | | CPMF: Extended Mode CSSID: 0 | |--------------------------------------------------------------------------------------------------------------------------------- | | <----------------------- HiperSocket Activity/Sec --------------------> | | <-- Total for System --> <----------- Own Partition ------------> | |Channel <--Transferred--> Failed <--Transferred--> <----- Failed -----> | |ID Shrd T_Msgs T_DUnits T_NoBuff L_Msgs L_DUnits L_NoBuff L_Other | |FB NO 0.63 15033 1.94 0.59 15033 1.94 1.94 | |FE NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | |FF NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | +----------------------------------------------------------------------------------------------------------------------------------+ | C H A N N E L P A T H L O A D A N A L Y S I S R E P O R T | | Page nnn| | z/VM System ID SYSC Start 21JUL10:00:59:45.92 | | Release V5R4 End 21JUL10:01:59:45.92 | | CPMF: Extended Mode CSSID: 0 | |--------------------------------------------------------------------------------------------------------------------------------- | | <----------------------- HiperSocket Activity/Sec --------------------> | | <-- Total for System --> <----------- Own Partition ------------> | |Channel <--Transferred--> Failed <--Transferred--> <----- Failed -----> | |ID Shrd T_Msgs T_DUnits T_NoBuff L_Msgs L_DUnits L_NoBuff L_Other | |FB NO 0.63 15033 1.94 0.59 15033 1.94 1.94 | |FE NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | |FF NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | +----------------------------------------------------------------------------------------------------------------------------------+ | C H A N N E L P A T H L O A D A N A L Y S I S R E P O R T | | Page nnn| | z/VM System ID SYSC Start 21JUL10:01:59:45.92 | | Release V5R4 End 21JUL10:02:59:45.92 | | CPMF: Extended Mode CSSID: 0 | |--------------------------------------------------------------------------------------------------------------------------------- | | <----------------------- HiperSocket Activity/Sec --------------------> | | <-- Total for System --> <----------- Own Partition ------------> | |Channel <--Transferred--> Failed <--Transferred--> <----- Failed -----> | |ID Shrd T_Msgs T_DUnits T_NoBuff L_Msgs L_DUnits L_NoBuff L_Other | |FB NO 0.63 15033 1.94 0.59 15033 1.94 1.94 | |FE NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | |FF NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | +----------------------------------------------------------------------------------------------------------------------------------+ | C H A N N E L P A T H L O A D A N A L Y S I S R E P O R T | | Page nnn| | z/VM System ID SYSC Start 21JUL10:02:59:45.92 | | Release V5R4 End 21JUL10:03:59:45.92 | | CPMF: Extended Mode CSSID: 0 | |--------------------------------------------------------------------------------------------------------------------------------- | | <----------------------- HiperSocket Activity/Sec --------------------> | | <-- Total for System --> <----------- Own Partition ------------> | |Channel <--Transferred--> Failed <--Transferred--> <----- Failed -----> | |ID Shrd T_Msgs T_DUnits T_NoBuff L_Msgs L_DUnits L_NoBuff L_Other | |FB NO 0.63 15033 1.94 0.59 15033 1.94 1.94 | |FE NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 | |FF NO 0.00 ------ 0.00 0.00 0.00 0.00 0.00 |