HHC00435I 0:0148 CKD file 'D:/MVS/DASD/MVSRES.CCKD': cyl 0 head 0 record 1 kl 4 dl 24 of 0

HHC01312I 0:0148 CHAN: stat 0C00, count 0000 ''

HHC01315I 0:0148 CHAN: ccw 08003AA0 00000000=>31003ABE 40000005 08003AA0 00000000 .... .........

HHC01315I 0:0148 CHAN: ccw 31003ABE 40000005=>00000000 04000000 00000000 00000000 ..............

.

.

.

Figure 320: T+ dev command

Example 2:

Turn off the CCW tracing for device 0148.

HHC00013I Herc command: 't-0148'

HHC02204I CCW trace for 0:0148 set to off

Figure 321: T- dev command

Example 3:

Turn on the CCW tracing for several devices.

HHC00013I Herc command: 't+0344'

HHC02204I CCW trace for 0:0344 set to on

HHC00013I Herc command: 't+0345'

HHC02204I CCW trace for 0:0345 set to on

Figure 322: T+ dev command (for several devices)

8.182 TIMERINT (Display or set timers update interval)

8.182.1 Function

The TIMERINT parameter displays or sets the internal timer update interval in microseconds. This para-
meter specifies how frequently Hercules's internal timers-update thread updates the TOD clock, CPU
Timer and other architectural related clock and timer values.

The default interval is 50 microseconds which attempts to strike a reasonable balance between clock
accuracy and overall host performance.

8.182.2 Syntax

Descriptive

]

Diagram

¬¬¬¬ ¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ




8.182.3 Parameter

interval

Specifies the timer update interval in microseconds. The minimum allowed value for
the interval is 1 microsecond and the maximum is 1'000'000 microseconds (one se-
cond.

CAUTION: While a lower TIMERINT value may help increase the accuracy of the
guest's TOD clock and CPU Timer values, it could also have severe negative im-
pact on the overall performance of the host operating system. This is especially
true when a low value is coupled with a high HERCPRIO and TODPRIO priority
setting.

Exercise extreme caution when choosing your desired TIMERINT in relationship to
your chosen HERCPRIO and TODPRIO priority settings.

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