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Status Delivered
Workspace z/OS
Categories BCP_XCF/XES
Created by Guest
Created on Nov 9, 2015

RELATED IDEAS

Round robin scheduling of SRBs to CF list connectors

z/OS will always process the list notifications on a given system in the same order. It steps through the queue of structures that have active connectors on the system, one at a time, looking for structures that have list notification users; and then it steps through the queue of connectors to the structure who have actually received a pending list notification signal, one at a time, scheduling off an asynchronous SRB routine to that connector's address space to process the notification and drive the connector's list transition exit as it goes. Since the order of this queue of connectors to a structure on a given system is always a function of the order in which they connected, one of the connectors always gets looked at (and assuming both notifications have already arrived, gets his SRB routine scheduled to run) first. The second connector in this queue, other things being equal, is at a disadvantage.

Our application is pulling work from list structures and the work is not evenly distributed due to the scheduling of the SRBs to the connectors in the same order. Changing the scheduling to a round robin approach will allow the work to be more evenly distributed.

Idea priority High
  • Guest
    Reply
    |     Feb 13, 2025
    Available with LISTNOTIFYDELAY function delivered in z/OS 2.3 and CFLEVEL=22.
  • Guest
    Reply
    |     Nov 10, 2015

    Creating a new RFE based on Community RFE #79517 in product z/OS.

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