QIO Assist Performance APAR (SIGA Reduction)
APAR Identifier ...... PQ81580 Last Changed ........ 03/12/17
QIO ASSIST PERFORMANCE APAR (SIGA REDUCTION)
Symptom ...... NF NEWFUNCTION Status ........... CLOSED UR1
Severity ................... 4 Date Closed ......... 03/12/12
Component .......... 5735FAL00 Duplicate of ........
Reported Release ......... 440 Fixed Release ............ 999
Component Name TCP/IP V2 FOR V Special Notice HIPER
Current Target Date .. Flags
SCP ................... FUNCTIONLOSS
Platform ............
Status Detail: SHIPMENT - Packaged solution is available for
shipment.
PE PTF List:
PTF List:
Release 440 : UQ83180 available 03/12/17 (1000 )
Parent APAR:
Child APAR list:
ERROR DESCRIPTION:
new function
LOCAL FIX:
PROBLEM SUMMARY:
****************************************************************
* USERS AFFECTED: All z/VM TCPIP customers using OSD Device *
* and Link Statements for OSA Express devices. *
* This APAR has no benefit for customers *
* using HiperSocket devices. *
****************************************************************
* PROBLEM DESCRIPTION: *
****************************************************************
* RECOMMENDATION: APPLY PTF *
****************************************************************
This APAR provides a performance enhancement made to z/VM 4.4.0
TCPIP Stack's OSD device driver.
PROBLEM CONCLUSION:
TEMPORARY FIX:
COMMENTS:
This APAR provides a performance enhancement made to z/VM's
TCP/IP Stack device support for OSA Express.
When running on a z990 machine it is also advisable to install
the CP enhancements provided by VM63385 to realize a further
benefit. However, VM63385 is not required to apply this APAR.
This APAR optimizes the way z/VM TCPIP's Stack transfers
datagrams via a QDIO output queue. With this function
applied, the stack will reduce the number of times it
needs to signal the QDIO adapter when sending outbound
datagrams.
MODULES/MACROS: FPQDIO TCPIP
SRLS: NONE
RTN CODES:
CIRCUMVENTION:
MESSAGE TO SUBMITTER:
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