Expand Configuration and Management Manual (G06.24+)

Subsystem Control Facility (SCF) Commands
Expand Configuration and Management Manual—523347-008
15-108
TRACE Command
PAGES pages
pages is an integer in the range 4 to 64. PAGES controls how much space, in
units of pages, is allocated in the extended data segment used for tracing. PAGES
may be specified only when the trace is being initiated. The default value is 64
pages.
RECSIZE size
size is an integer in the range 16 to 4050. It controls the length of the data in the
trace data records. The trace header is not included in RECSIZE. The default is
120 bytes. 8 bytes are used for the header, and 120 bytes are used for trace data.
A RECSIZE of 500 is recommended for $NCP traces. If PATHBLOCKBYTES or
PATHPACKETBYTES is enabled, a RECSIZE greater than the
PATHBLOCKBYTES or PATHPACKETBYTES is recommended for Expand traces
in order to avoid truncating the data records.
SELECT select-spec
select-spec is one of the parameter specification combinations described in
Table 15-8, Table 15-9, or Table 15-10. You can specify either the keyword or the
bit number.
The select-spec for $NCP is described in Table 15-8.
The select-spec for the LINE object is described in Table 15-9.
Table 15-8. $NCP Trace Records
Mask Trace Record
Keyword Bits Meaning Type (decimal)
L0 0 Packet sent by $NCP 0
0 Packet received by $NCP 1
L2 2 Layer 2 events 2
L4 4 Layer 4 events 4
4 System abort message 6
4 System connect message 6
ALL 0-31 Sets all trace record types