Rexx sleep command

Question

I want to make the CPU go from 0% utilization back to 100% every 10 seconds. Kind of like waves if that makes sense. I was wondering if anybody could help me since I have no clue how to do it.

Please see [ask] and take the [tour]. You're expected to make an effort and show some code. — isherwood, Aug 24 '22 at 13:19
Why? I mean, there's no legitimate use for this so perhaps this is the wrong question and the operating system, will actively prevent you from doing this. Tell us what you are trying to achieve. — Steve Ives, Oct 06 '22 at 12:11

score 0 · Answer 1 · answered Sep 19 '22 at 14:15

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You may try Address TSO "OPSWAIT 10" and some kind of busy loop.

answered Sep 19 '22 at 14:15

Polluks

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You've no chance of getting the CPU to hit 100% through REXX. also OPSWAIT is specific to Ops/MVS which may not be installed. – Steve Ives Oct 07 '22 at 14:08
@SteveIves Indeed, 100% load would be a bug in the scheduler. – Polluks Oct 08 '22 at 09:33

score 0 · Answer 2 · answered Jun 26 '23 at 17:13

OPSWAIT looks like an OPS/MVS command which the OP may not have.

Here is a general routine that you can model that uses the OMVS (aka USS) sleep function:

/* rexx */                                 
/* call USS sleep routine */               
parse arg sleep_sec .                      
say time()                                 
address 'SYSCALL' 'SLEEP ('sleep_sec')'    
say time()                                 
return 0

Rexx sleep command

2 Answers2