Re: How to know when memory pages are swapped?
Re: How to know when memory pages are swapped?
- Subject: Re: How to know when memory pages are swapped?
- From: Stéphane Letz <email@hidden>
- Date: Wed, 4 May 2005 22:15:44 +0200
Le 4 mai 05, à 22:06, Godfrey van der Linden a écrit :
No. We have been asked for this functionality quite a number of times
but there really is no good way for the kernel to notify and heat up
code in a client app when it chooses to page out some data.
I have to ask, what are you trying to achieve? There is usually
someway of achieving a very similar effect.
Cheers
Godfrey
On 05/04/2005, at 12:12 , Stéphane Letz wrote:
Hi,
In there any way for an application to be "notified" when one of the
memory pages it uses is swapped on the disk? Is there a way to
install an handler for "page-out" event?
I need to avoid page to be swapped because they are accessed in a
real-time audio thread. I finally found that mlock/munlock functions
are available for user space code. Is this correct?
from the #include <Kernel/sys/mman.h>
__BEGIN_DECLS
#ifdef _P1003_1B_VISIBLE
int mlockall __P((int));
int munlockall __P((void));
#endif /* _P1003_1B_VISIBLE */
int mlock __P((const void *, size_t));
#ifndef _MMAP_DECLARED
#define _MMAP_DECLARED
void * mmap __P((void *, size_t, int, int, int, off_t));
#endif
What is this _P1003_1B_VISIBLE defined for actually? is this for kernel
code only?
Thanks
Regards
Stephane Letz
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