Is it possible to see memory over 3GB on 32-bit FreeBSD?
I know that 32-bot Linux can see something like 3.6GB. Is this possible on FreeBSD? I see this message in system log: real memory = 6442450944 (6144 MB) avail memory = 3123482624 (2978 MB) Yuri ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Is it possible to see memory over 3GB on 32-bit FreeBSD?
In response to Yuri y...@rawbw.com: I know that 32-bot Linux can see something like 3.6GB. Is this possible on FreeBSD? I see this message in system log: real memory = 6442450944 (6144 MB) avail memory = 3123482624 (2978 MB) Most systems usually see about 3.5G ... don't know why FreeBSD would see less than that. amd64 is the way to go. If you _must_ stick with i386, you can try PAE in your kernel, but I don't know if that's even supported any more. -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Is it possible to see memory over 3GB on 32-bit FreeBSD?
On Wed, Feb 17, 2010 at 03:02:17PM -0500, Bill Moran wrote: In response to Yuri y...@rawbw.com: I know that 32-bot Linux can see something like 3.6GB. Is this possible on FreeBSD? I see this message in system log: real memory = 6442450944 (6144 MB) avail memory = 3123482624 (2978 MB) Most systems usually see about 3.5G ... don't know why FreeBSD would see less than that. It very much depends on what hardware you have in the system. Just about every expansion card or I/O device will reserve some of the address space for its own use. Some devices will need a lot of space - a graphics card with 256MB of RAM on it will use (at least) 256MB of the address space for example. amd64 is the way to go. If you _must_ stick with i386, you can try PAE in your kernel, but I don't know if that's even supported any more. -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org -- Insert your favourite quote here. Erik Trulsson ertr1...@student.uu.se ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Is it possible to see memory over 3GB on 32-bit FreeBSD?
Erik Trulsson wrote: It very much depends on what hardware you have in the system. Just about every expansion card or I/O device will reserve some of the address space for its own use. Some devices will need a lot of space - a graphics card with 256MB of RAM on it will use (at least) 256MB of the address space for example. This doesn't seem like a good idea that video memory is always mapped to system memory. What if one day graphics card gets 4GB RAM? Then we won't even be able to have 32-bit OS working with such card and in 64-bit OS 4GB of memory would be grossly wasted. Yuri ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Is it possible to see memory over 3GB on 32-bit FreeBSD?
Hi-- On Feb 17, 2010, at 3:59 PM, Yuri wrote: Erik Trulsson wrote: It very much depends on what hardware you have in the system. Just about every expansion card or I/O device will reserve some of the address space for its own use. Some devices will need a lot of space - a graphics card with 256MB of RAM on it will use (at least) 256MB of the address space for example. This doesn't seem like a good idea that video memory is always mapped to system memory. What if one day graphics card gets 4GB RAM? Then we won't even be able to have 32-bit OS working with such card and in 64-bit OS 4GB of memory would be grossly wasted. At one point, there was a considerable advantage to have video card memory fully mapped into untranslated address space so that various things could read or write as they pleased (cf VESA linear framebuffer); generally they gained speed advantages from this. With AGP's GART, the amount of memory available for textures, bump-maps, etc, could reside in video card memory, local RAM, or a combination. Modern video cards do not have keep their entire memory space mapped into address space; for example, a nVidia 275 card with 1792 MB of RAM doesn't seem to want more than 256MB of address space under 32-bit Windows platforms. Regards, -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
