Hello,
1.
Transparent Superpages was in FreeBSD for a few years.
I would like to know if there is any benchmark or real world performance
experience about this setting.
2.
I have seen somewhere that non-transparent superpages was being developed in
HEAD too.
Any insight on it? Please correct
I poked around in the stuff in /sys/i386/vm looking for the threshholds
of process memory size for promotion to 4 MB pages and for demotion back to
4 KB pages, but didn't see them. Can someone tell me what those threshholds
are? I'm assuming there must be a larger threshhold for promotion
A short while ago, I wrote:
I poked around in the stuff in /sys/i386/vm looking for the threshholds
That should have said, /sys/vm, not what I wrote. Sorry for any
confusion.
of process memory size for promotion to 4 MB pages and for demotion back to
4 KB pages, but didn't see
maybe not new news but i just found this:
http://www.h-online.com/open/FreeBSD-7-2-released-now-with-Superpages--/news/113204
It says about pages 4KB and 4MB and that it's done
automatically.
Two questions:
1) is it on all architectures including amd64? As amd64 supports 4KB, 2MB
and 1GB
On Thu, May 28, 2009 at 02:50:16PM +0200, Wojciech Puchar wrote:
maybe not new news but i just found this:
http://www.h-online.com/open/FreeBSD-7-2-released-now-with-Superpages--/news/113204
It says about pages 4KB and 4MB and that it's done
automatically.
Two questions:
1
On Thu, 28 May 2009 17:17:38 +0200
cpghost cpgh...@cordula.ws wrote:
The following excerpt from:
http://www.freebsd.org/releases/7.2R/relnotes-detailed.html
may be helpful:
[amd64, i386] The FreeBSD virtual memory subsystem now supports
fully transparent use of superpages
[amd64, i386] The FreeBSD virtual memory subsystem now supports
fully transparent use of superpages for application memory;
application memory pages are dynamically promoted to or demoted from
superpages without any modification to application code. This change
offers the benefit of large
