ksleep command

Ramsunder S — Fri, 12 Jul 2002 11:30:34 GMT

Hi,
What is the ksleep command? How is it different from the sleep command?

Regards,
Ram.

Re: ksleep command

harry d brown jr — Fri, 12 Jul 2002 11:41:19 GMT

The sleep*() Routines
Unless a thread is running with real-time priority, it will exhaust its time slice and be put to sleep. sleep() causes the calling thread (not the
process) to suspend execution for the required time period. A sleeping thread gives up the processor until a wakeup() occurs on the channel on
which the thread is placed. True? During sleep() the thread enters the scheduling queue at priority (pri).
??? When pri <= PZERO, a signal cannot disturb the sleep
??? Ifpri > PZERO the signal request will be processed.
??? In the case of RTPRIO scheduling, a signal can be disturbed only if SSIGABL is set. Setting SSIGABL is dependent on the value of pri.
NOTE The sleep.h header file has parameter and sleep hash queue definitions for use by the sleep routines. The ksleep.h header file has
structure definitions for the channel queues to which the kernel thread is linked when asleep.

http://devresource.hp.com/STK/partner/proc_mgt.pdf

live free or die
harry

Re: ksleep command

Ramsunder S — Sat, 13 Jul 2002 05:43:39 GMT

Thanks Harry. The document is quite informative.
As I understand it, ksleep would be invoked by the kernel thread when a sleep is called by its corresponding process thread (assuming that we have the 1x1 model - Kernel Space Threads per the document in HP-UX 11 as well). Is that right?

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