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: