Siemens U3585-J-Z125-8-76 1 manual Special applications, 1 SM2 together with VM2000

Notes on SM2 operation Special applications (VM2000)

6.3 Special applications

6.3.1 SM2 together with VM2000

If monitoring is executed under VM2000 control within BS2000 systems, the following special considerations are applicable for the implementation of the SM2 program and for the interpretation of the monitored data:

–Generally speaking, SM2 is executable under any guest system and provides monitored data relevant to the respective local guest system.

–The sum TU + TPR + SIH + IDLE is relativized in every guest system to 100% in the ACTIVITY report, PERIODIC-TASK report, CPU report (NORMED column), and SM2R1 report 1.

The result of this relativation is the manual formation of the sums of the percentage load for all guest systems, not the total CPU utilization.

–In the SM2R1 report 2 and the CPU report (MEASURED column), the non-relativized values for TU, TPR, SIH and IDLE are shown, i.e. the real load values determined by the relevant guest systems.

Under VM2000/SR, the real CPUs are assigned exclusively to the guest system, i.e. the non-relativized values for TU, TRP, SIH, and IDLE correspond to the relativized values.

The time components of CPU utilization in the CPU report (MEASURED column) cannot be compared with the data in the VM2000 report (CPU MEAS). The data in the CPU report relate to the assigned CPUs of the VM, while the utilization values in the VM2000 report relate to the physically available CPUs.

–The values in SM2R1 reports 62 and 60 are also not relativized! In this case the real CPU times (TU + TPR) or the time equivalent of the CPU time will be listed for the local guest system and for each category.

–The CPU time given in the task statistics report is likewise the real CPU time consumed by a task in processor states TU + TPR.

–A summary of the overall CPU utilization, distribution of the CPU capacity among the individual guest systems, and the CPU time used by the individual guest systems is represented for the SM2 which is brought to execution on the privileged machine (VM1). (See also VM2000 report or SM2R1 report 98 and 99.)

–If SM2 is running on a normal guest system, only the values relevant to this guest system are identified in the VM2000 report or SM2R1 report 98.

The channel utilization is an exception, as the overall utilization is always output here.

–For information on the accuracy of the TU and TPR times, see “Notes on particular variables” on page 345.

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