JVM CPU History (JVMCPU)

Use the JVM CPU History hyperlink to access the JVMCPU view, which displays CPU information for all of the JVMs that have run on your system. NGL collects this information when a JVM stops.

Note

You can filter the JVMCPU view by job name. If the current target is a JVM, that job name is the default filter.

The following figure shows a sample JVMCPU view:

>W1 =JVMCPU============Q141JMP1=*========26MAR2018==07:46:47====MVJE=====D==400
+ Logged JVM CPU Data          Retrieval Filters
Job      Record   Start I JVM        CPU      Total CP Offload Normaliz SUPon
Name     Time     Time E Type       Time     CPU      CPU Time Offload CPU T
Q141JMP1 07:45:02 07:21 I IMSJMP       3.8575   0.2392   1.5086   3.6183   0.0
Q141JMP1 07:30:02 07:21 I IMSJMP       3.3592   0.2250   1.3068   3.1342   0.0
Q141JMP1 16:23:42 11:06 E IMSJMP      24.3584   2.6785   9.0392 21.6799   0.1
Q141JMP1 16:15:16 11:06 I IMSJMP      20.9330   2.3572   7.7450 18.5758   0.0
Q141JMP1 16:00:17 11:06 I IMSJMP      20.8499   2.3452   7.7153 18.5047   0.0
Q141JMP1 15:45:15 11:06 I IMSJMP      20.7710   2.3320   7.6879 18.4390   0.0
Q141JMP1 15:30:16 11:06 I IMSJMP      20.6968   2.3214   7.6614 18.3754   0.0
Q141JMP1 15:15:17 11:06 I IMSJMP      20.6106   2.3078   7.6311 18.3028   0.0
Q141JMP1 15:00:15 11:06 I IMSJMP       6.0366   0.5196   2.3003   5.5170   0.0

The data values are the totals for the run. By default, the view displays job end records including:

Job name
JVM type
Time and date range

The following hyperlink is provided on the view:

Hyperlink from	To access
Job Name	All JVM Detail view (JVMCPUD), showing a form of the individual record from the JVMCPU and JVMCPUI views

The following table describes the data fields:

Field	Description
Start Date Start Time	Date and time when the JVMs process started, as reported by USS The time has been converted from the POSIX epoch to MVI format for display. The element name for this field is STARTTM.
IE	Record type, as follows: I – Interval record E – End of JVM record Note: This field contains the minimum of any row of data with the same job name and process ID. The element name for this field is RECTYPE.
JVM Type	Type of JVM that is running in this address space
CPU Time	Total CPU time used by the task running the JVM, displayed in seconds This value includes time running on the central processor (CP) and the normalized time running on support processors. The element name for this field is CPUTIME.
Total CP CPU	Total time spent running on a general processor, displayed in seconds The element name for this field is TIMEONCP.
Offload CPU Time	Total time spent running on a support processor, displayed in seconds The element name for this field is TIMESUP.
Normaliz Offload	Total time spent running on a support processor as if it were running on a general processor This value indicates (in seconds) how long running on a CP would have taken if the support processor had not been available. The element name for this field is TIMESUPN.
Sup on CP CPU Time	Total time spent running on a general processor when it could be running on a support processor and there was no support processor available This value is displayed in seconds. The element name for this field is SUPTONCP.
Other CPU TCBTTIME	Number of CPU seconds that were gathered using TCBTTIME because TIMEUSED was not available The element name for this field is TIMEUNSP.
Process ID	Process ID (PID) that is assigned to the JVM by UNIX Systems Services This identifier is unique for each JVM running, even when multiple JVMs run in the same address space.
Record Date Record Time	Times when the CPU data is collected The time value is in MVI time format, based on the Jan 1, 1980 epoch. You can change the format by using the DATE option of the MVPARMS command. The element name for this field is DATETIME.
Thread ID	USS Thread ID of the JVM The data in this field is represented by hexadecimal numbers. The element name for this field is THREADID.
ASID	ID of the address space where the JVM is running The data in this field is represented by hexadecimal numbers. The element name for this field is ASID.
Current TCB	TCB where the JVM is running The data in this field is represented by hexadecimal numbers. The element name for this field is TCBADDR.
Total TCB	Number of TCBs identified for this JVM The element name for this field is TCBTOTC.
Reported TCB	Number of the JVM TCBs that sent CPU data to the product upon task completion The element name for this field is TCBREPC.
Report Discrepa	One of the following descrepancies, depending on whether the value is positive or negative: If this value is positive, most likely a task was started after the gather request was made. If this value is negative, most likely the CPU information was gathered and the task ended before the report was made. In either nonzero case, the CPU for this interval might be skewed. The element name for this field is TCBNREP.

This section contains the following topic:

JVM CPU History (JVMCPU)

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