Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### HFYBK

Prolog

Control Block Contents
HFYBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### HFYBK Prolog

     NAME       : HCPHFYBK
     DESCRIPTION: Monitor System Domain Hi-Frequency Sample Data
     DSECT      : HFYBK
     FUNCTION   : Control block for system-domain high-frequency
                  sample data. Data collected here are later
                  transferred to the system-domain monitor record, MRSYTCPC.
     LOCATED BY : MNDHF_SYS_DATA
     CREATED BY : HCPMOYIN
     DELETED BY : HCPMOYTM
     REFERENCES : none
     SERIALIZED : MNDHFYLK lockword of HCPMND (Monitor data area)
     NOTES      : none.

#### HFYBK Control Block Content

#### HFYBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      HFYBK          Monitor System Domain
                                            Hi-Frequency Sample Data
    0000    0 Signed       4 HFYCOUNT       Number of samples taken
    0004    4 Signed       4 HFYCACTV (256) The Number of times each channel
                                            path was active. Each index
                                            number of this array corresponds
                                            to its channel path number, 0 to
                                            255.
    0404 1028 Signed       4 HFYCHSIM (51)  The number of times a total
                                            number of channel paths were
                                            simultaneously active. For index
                                            numbers, 0 to 49, each index
                                            number corresponds to the total
                                            number of channel paths that were
                                            active. For index number 50, this
                                            is the number of times that 50 or
                                            more channel paths were
                                            simultaneously active.
              000004D0       HFY$END        *
              0000009A       HFYSIZE        (HFY$END-HFYBK+7)/8 HFYBK size in
                                            doublewords

#### HFYBK Storage Layout

    *** HFYBK - Monitor System Domain Hi-Frequency Sample Data
    *
    *     +---------------------------+---------------------------+
    *   0 |         HFYCOUNT          |                           |
    *     +---------------------------+                           |
    *   8 |                                                       |
    *     =                       HFYCACTV                        =
    *     |                           +---------------------------+
    *     |                           |                           |
    *     +---------------------------+                           |
    * 408 |                                                       |
    *     =                       HFYCHSIM                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 4D0
    *
    *** HFYBK - Monitor System Domain Hi-Frequency Sample Data

#### HFYBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    HFY$END        0404 000004D0
    HFYCACTV       0004
    HFYCHSIM       0404
    HFYCOUNT       0000
    HFYSIZE        0404 0000009A

This information is based on z/VM V5R2.0. Last updated on 12 Apr 2006 at 16:58:26 EDT.
Copyright IBM Corporation, 1990, 2005