5.76 TODDRAG (TOD clock drag factor)

5.76.1 Function

TODDRAG specifies the TOD clock drag factor. This parameter can be used to slow down or speed up
the TOD clock by a factor of factor. A significant slowdown can improve the performance of some
operating systems which consume significant amounts of CPU time processing timer interrupts. A drag
factor of 2.0 slows down the clock by 50%, a drag factor of 0.5 doubles the speed of the clock, a drag
factor of 1.01 slows down the clock by 1% and 0.99 speeds up the clock by 1%.

5.76.2 Syntax

Descriptive

factor

Diagram

Êʬ¬¬ T ¬¬¬§¬¬¬ ¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ

factor ¬

5.76.3 Parameter

factor

The factor by which the TOD clock will be slowed down or sped up. The default fac-
tor is 1.000000.

5.76.4 Examples

Example 1:

Slow down the TOD clock by 50%.

TODDRAG 2

Example 2:

Double the speed of the TOD clock.

TODDRAG 0.5

5.77 TODPRIO (Timer thread process priority)

5.77.1 Function

With this parameter you can specify the priority of the TOD clock and the timer threads. See section

Caution: TODPRIO should be given a dispatching priority equal to or higher than any other thread within
Hercules (CPUPRIO, DEVPRIO, HERCPRIO, SRVPRIO).

5.77.2 Syntax

Descriptive

- nn

Diagram

- ¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ

nn

5.77.3 Parameter

15

Specifies a TOD clock process prority of -20. This is the default

nn

This value specifies the priority of the TOD clock and the timer thread. For details
on the priority values see section

5.77.4 Examples

Example 1:

Set the priority of the TOD clock and the timer threads to -20.

TODPRIO -20