Detail VMX Channel Busy Report
Detail VMX Channel Busy Report produces a tabular listing of channel activity by CHPID for the duration of the period specified in the run- time execution parameters.
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The percent busy and the percent of system values represent an average for the period covered by report.
Intended use
Allows analysis of CHPIDs that are being heavily used. Such a report might be used to detect channels that are being over-utilized or under-utilized, and to detect the proportionate share of all channel activity being handled by a given channel.
Format
A tabular report in ascending order of CHPID, where each column represents a different measurement associated with a given CHPID.
An example of this report is shown in the
Detail VMX Channel Busy Report
figure.Inquiry ID
- Tabular Report: VMXTX2
Data Source (File/Timespan):
VMXCHC01 - DETAIL
Data elements used
- CHCHPID
- - Channel Path ID
- VMXHFSAM
- - High Frequency Sample Count
- CHCPCBSY
- - Percent CHPID Busy
Calculations
SYSBUSY, the percentage of all channel activity handled by a given channel, is obtained by adding up the summarized percent channel busy values for all CHPIDs, and placing this value in a temporary element named BUSYTOT. The percentage workload held by each channel path is then computed as follows:
SYSBUSY = CHCPCBSY / BUSYTOT*100;
Usage considerations
The Channel Path Contention Data File (VMXCHC) is created from the 0/09 monitor records. With the introduction of z990 processor, the 0/09 no longer contains valid channel path information. It is recommended that the 0/18 or 0/20 monitor records be used for valid channel path information.
See report VMXLS1 (VM Channel Path Load Analysis).
Detail VMX Channel Busy Report Sample
Detail VMX Channel Busy Report (Channel Path Order) 1 Product Manufacturing Corporation INQUIRY: VMXTX2 RUN DATE: 1FEByy -------------------------------------------- SYSID=VM YEAR=yy MONTH=12 DAY=21 ------------------------------------------------- Channel Sample Percent Percent Path ID Count Busy of System 00 864 0.00 % 0.00 % 01 864 0.00 % 0.00 % 02 864 0.00 % 0.00 % 03 864 6.13 % 8.93 % 04 864 0.00 % 0.00 % 05 864 0.00 % 0.00 % 06 864 0.00 % 0.00 % 07 864 2.77 % 4.04 % 08 864 0.46 % 0.67 % 09 864 0.81 % 1.18 % 0A 864 4.74 % 6.91 % 0B 864 2.66 % 3.87 % 0C 864 2.89 % 4.21 % 0D 864 3.47 % 5.05 % 0E 864 3.81 % 5.56 % 0F 864 3.00 % 4.38 % 10 864 0.92 % 1.34 % 11 864 0.00 % 0.00 % 12 864 0.00 % 0.00 % 13 864 0.00 % 0.00 % 14 864 0.00 % 0.00 % 15 864 0.00 % 0.00 % 16 864 0.00 % 0.00 % 17 864 0.00 % 0.00 % 18 864 0.00 % 0.00 % 19 864 0.00 % 0.00 % 1A 864 0.00 % 0.00 % 1B 864 1.85 % 2.69 % 1C 864 0.00 % 0.00 % 1D 864 0.00 % 0.00 % 1E 864 0.00 % 0.00 % 1F 864 7.29 % 10.62 % 20 864 1.73 % 2.52 % 21 864 2.77 % 4.04 % 22 864 3.00 % 4.38 %