1. OpenBSD/sgi SMP
Implementation for Origin 350
syuu@openbsd.org

2. SGI Octane SMP
Theo de raadt Origin 350 ;-)

4. CPU Inter-processor
Interrupt

5. CPU Inter-processor
Interrupt

6. …
Origin 350
→ SGI Onyx 350
HPC

7. NUMALink

8. If a particular node is missing, it leaves a gap in the address map and any attempte
access to the missing address space returns an address error.
Node 4
Node 3
Base Address 12G
Increasing
addresses Node 2
Base Address 8G
Node 1
Base Address 4G
(missing)
Base Address 0
Figure 2-2 Cac Space Addressing
Calias memory space for all nodes is only accessible by the local processor, at physic
address 0 up to Calias size.

9. Processor 0 Processor 1
Processor Memory Processor Memory
address address address address
0x2_FFFF 0x2_FFFF
to to
0x2_0000 0x2_0000
Addr = 0x2_0000 Addr = 0x2_0000
0x1_FFFF 0x0_FFFF
to to
Swapped
Addr = 0x1_0000 0x1_0000 Addr = 0x1_0000 0x0_0000 address
0x0_FFFF 0x1_FFFF spaces
to to
0x0_0000 0x1_0000
Addr = 0x0_0000 Addr = 0x0_0000
Figure 2-8 Processor 0/1 Address Mapping in Ualias
ExceptionVector …

10. • Router chip: located on each Router board in CrayLink Interconnect.
• Crossbow chip: located on the midplane as part of the XIO interconnect
• Bridge, LINC, and IOC3 chips: located on XIO boards linked to the I/O interface
IO Figure 3-1 shows interconnections between these ASICs and the communication
protocols that run on the interconnections from the Hub ASIC.
XIO PCI Serial
PCI
XBOW IOC3
Low Adapter
Processors -Le XIO tocol Ethernet
vel
Pro
HUB
CrayLink Interconnect
l Cra
Memory w- leve Pro yLink
Lo toc Router
ol
To Other HUB
Figure 3-1 ASIC Protocols
IO IO

11. +------------+ +------------+ +------------+ +------------+
| lboard | +-->| lboard | +-->| rboard | +-->| lboard |
+------------+ | +------------+ | +------------+ | +------------+
| board info | | | board info | | |errinfo,bptr| | | board info |
+------------+ | +------------+ | +------------+ | +------------+
| offset |--+ | offset |--+ | offset |--+ |offset=NULL |
+------------+ +------------+ +------------+ +------------+
+------------+
| board info |
+------------+ +--------------------------------+
| compt 1 |------>| type, rev, diaginfo, size ... | (CPU)
+------------+ +--------------------------------+
| compt 2 |--+
+------------+ | +--------------------------------+
| ... | +--->| type, rev, diaginfo, size ... | (MEM_BANK)
+------------+ +--------------------------------+
| errinfo |--+
+------------+ | +--------------------------------+
+--->|r/l brd errinfo,compt err flags |
+--------------------------------+
CPU

12. CPUID CPUID
CPU
CPU
IPI
MP-safe