Dear all,
Does any ever try FreeBSD 7.1-stable on box that has more than 16 CPU?
I got a HP ProLiant DL 785 G5 with 32 core (Quad-Core AMD Opteron(tm)
Processor 8356 (2300.10-MHz K8-class CPU) and 256G memory.
When I boot this machine, it could detect 32 core, but only 16 core
could be uesd!?
What should I do to get FreeBSD 7.1-stable work with 32 core?
Or, FreeBSD 7.1 only support 16 Core Max ?
Best Regards!
James Chang
Quoting James Chang, who wrote on Thu, Feb 12, 2009 at 09:54:00PM +0800 ..> Dear all, > > Does any ever try FreeBSD 7.1-stable on box that has more than 16 CPU? > > I got a HP ProLiant DL 785 G5 with 32 core (Quad-Core AMD Opteron(tm) > Processor 8356 (2300.10-MHz K8-class CPU) and 256G memory. > When I boot this machine, it could detect 32 core, but only 16 core > could be uesd!? > > What should I do to get FreeBSD 7.1-stable work with 32 core?Buy the project a box like that? Or kidding aside: this is not the most common hardware, it might be that you are the first one to try ;-) Wilko> Or, FreeBSD 7.1 only support 16 Core Max ? > > > Best Regards! > > > James Chang > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"--- End of quoted text ---
On Thu, 12 Feb 2009, James Chang wrote:> Does any ever try FreeBSD 7.1-stable on box that has more than 16 CPU? > > I got a HP ProLiant DL 785 G5 with 32 core (Quad-Core AMD Opteron(tm) > Processor 8356 (2300.10-MHz K8-class CPU) and 256G memory. When I boot this > machine, it could detect 32 core, but only 16 core could be uesd!? > > What should I do to get FreeBSD 7.1-stable work with 32 core? Or, FreeBSD > 7.1 only support 16 Core Max ?I can't speak to the specific hardware you have, but one known limitation in several versions of FreeBSD is that the MAXCPU constant for i386 and amd64 is 16. You can redefine it in src/sys/${arch}/include/param.h and recompile your kernel to see the full 32 cores. You may need to recompile some userspace tools in order for them to properly report statistics for all CPUs, so a full rebuild of world wouldn't hurt. Robert N M Watson Computer Laboratory University of Cambridge