On 17/09/13 2:12 PM, Nick Holland wrote:
On 09/17/2013 01:41 PM, Andy wrote:
On Tue 17 Sep 2013 18:09:15 BST, Michael Chen wrote:
I'm considering bidding on this 48-core box:
http://www.ebay.com/itm/Supermicro-A-Server-1042G-TF-1U-H8QG6-4-CPUS-48-cores-2-2Ghz-128GB-RAM-/151119828428?pt=COMP_EN_Servershash=item232f7195cc
Does anyone have experience with it and can I use all the cores?
Thanks!
We use loads of Supermicro from Transtec and they work great.
This is second hand though..
never used one of those machines, but I did play with a mighty machine
recently. 1.5TB RAM, 4x8 HT'd cores (that's 64 sorta-cores...).
Unfortunately, it seemed that only 512G of RAM was usable, more than that caused
it to panic early in the boot process. So, I used boot(8) to restrict memory
that the kernel saw.
CVSROOT:/cvs
Module name:src
Changes by: a...@cvs.openbsd.org2004/07/19 09:09:06
Modified files:
sys/arch/amd64/amd64: cpu.c machdep.c mptramp.S pmap.c
sys/arch/amd64/include: pmap.h
Log message:
Implement __HAVE_PMAP_DIRECT on amd64 using large pages. At this moment
it's limited to 512GB (one L4 page table entry) physical memory. Only
used carefully at this moment, but more improvements are in the pipeline.
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