Perform component tracing to trace buffers

The operator performs the tasks. Note that these tasks are for a specific component trace, rather than for a trace started by the system at initialization.

1. Start the component trace: The operator enters a TRACE operator command on the console with MVS™ master authority. The operator replies with the options that you specified.

In the following example, the TRACE CT command does not specify a parmlib member.

trace ct,on,comp=sysxcf
* 21 ITT006A ....
r 21,options=(serial,status),end

This next example requests the same trace using parmlib member CTWXCF03. When TRACE CT specifies a parmlib member, the system does not issue message ITT006A.

trace ct,on,comp=sysxcf,parm=ctwxcf03

2. Verify that the Trace Is Running: See Verifying component tracing.

3. Obtain the Dump Containing the component trace Records: The operator obtains the dump that contains the component trace records: an SVC dump, a stand-alone dump, or a dump requested by the component when a problem occurs or when the operator stops the tracing.

This example shows a DUMP operator command entered on the console with MVS master authority. The system issues message IEE094D in response to the DUMP command. If you requested, the operator enters dump options in the reply to IEE094D. SDATA options are needed to obtain the trace buffers An address space identifier (ASID) should be specified for the XCF address space; in the example, XCF is in address space 6.

dump  comm=(dump for xcf component trace)
* 32 IEE094D ...
r 32,sdata=(couple,sqa,lsqa),asid=6,end
 .
 .
 .
IEA911E ...

The system identifies the data set containing the dump in message IEA911E. If an installation exit moves the dump, the operator should look for a message identifying the data set containing the moved dump and tell you the name of the dump and the data set containing it.

If desired, the operator can request more than one dump while a component trace is running.

4. Stop the component trace: The operator enters a TRACE CT,OFF command on the console with MVS master authority. For some component traces, the command requests a dump, which contains the trace records.

The following example shows how to specify the TRACE CT,OFF command.

trace ct,off,comp=sysxcf