topic Re: HP-UX 11i problem when using less than 10ms time sleep. in Operating System - Linux

HP-UX 11i problem when using less than 10ms time sleep.

김자명 — Mon, 29 Jan 2007 03:13:25 GMT

HP-UX has a problem when application uses a
function like usleep or nanosleep or sigalarm
to sleep less than 10ms.
It doesn't work in HP-UX 11i neither PA-RISC nor Itaninum2 CPU.

Is there any ohter method to use sleep less than 10ms.

Please help me.

Best Regards..

Re: HP-UX 11i problem when using less than 10ms time sleep.

Peter Godron — Mon, 29 Jan 2007 03:32:24 GMT

Hi,
and welcome to the forums!

I assume you have seen the comments in:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=13589
and another answer
"I used
system "perl -e 'select(undef,undef,undef,$wait);'" in a TCL script and now it runs perfectly! "

Please also read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33 on how to reward any useful answers given to your questions.

Re: HP-UX 11i problem when using less than 10ms time sleep.

James R. Ferguson — Mon, 29 Jan 2007 07:45:32 GMT

Hi:

You don't provide any specific details of your code or your expectations.

I'm going to assume the you are running 11.23 since you say that very short sleeps don't work on either PA-RISC or Itanium.

The ITRC Patch Database shows at least seven patches for 11.23 and high resolution timers, including patches to enable times with resolutions less than 10ms. A search for the keywords "usleep or nanosleep" yielded:

PHCO_34599
PHKL_34356
PHKL_34357
PHKL_34358
PHKL_34361
PHKL_35429
PHKL_35709

Regards!

...JRF...

Re: HP-UX 11i problem when using less than 10ms time sleep.

John Fjeldberg — Tue, 16 Oct 2007 00:56:39 GMT

Hi,
I see that HP has provided patched for 11.23, but I am wondering if anyone knows if this is a problem on 11.11 (PA/800)as well? I don't seem to be able to get under 20 ms in my tests.

Regards,
JHF