6.
Insert the CPU board CRU with at least module 0 processor installed. When you add the
CPU board CRU and turn on system power, the cooling fans should turn on and stay on and
the DF command output should look something like the following:
CRU IDs
-------
0001-Mem Extender 0002-Power Converter 0003-Power Supply 0
0004-Power Supply 1 0005-Diagnostic Panel 0006 Front Panel
0007-Disk Management 0008-Disk backplane 0010-Processor Board
0012-Power Pod 0 0013-Power Pod 1 0032-CPU 0 PIROM
0033-CPU 1 PIROM 0036-Processor 0 RAM 0037-Processor 1 RAM
0128-DIMM0A 0136-DIMM0B 0144-DIMM0C
0152-DIMM0D 0160-DIMM1A 0168-DIMM1B
0176-DIMM1C 0184-DIMM1D 0000-Motherboard
At this point, if the installed CRUs are all functional, the system should initiate POST on all
processors. It is recommended to observe the system console output using “Live Logs” to
ensure that POST is initiated and completes without error.
If POST does not start after a few seconds, suspect some sort of CPU board or processor
problem. Typical problems will show up in the SEL or FWP. If the IMPI event logs do not
point to a root cause, escalate to bring in expert assistance.
CPU/Memory/SBA
All of the CPU, Memory controller, and System Bus Adapter (SBA or I/O rope controller) functions
reside on the Processor card CRU; memory DIMMs reside on memory extender CRUs; and the
Local Bus Adapter (LBAs or PCI-X bus controller chips) reside on the common I/O Backplane
FRU along with core and customer Host Bus Adapter (HBA device controller) I/O cards. This
section discusses the roles of logical CPUs, physical memory ranks, and the rope interfaces in
the SBA logic of the zx2 chip.
Troubleshooting the CPU
Each server supports from one to four IPF processor modules. Each processor module contains
two individual CPU cores. This results in up to eight physical CPUs installed in rx6600 servers.
Furthermore, unlike previous IPF processor modules, each physical CPU core contains logic to
support two physical threads. This results in up to eight physical threads, or the equivalent of 16
logical CPUs in rx6600 servers when four processor modules are installed and enabled.
NOTE:
The operating system kernel attaches one or more software processes to each available
thread. In multiple processor servers, having more threads means all software processes are
launched and executed faster.
IPF Processor Load Order
For a minimally loaded server, one IPF processor module must be installed in CPU socket 0 on
the Processor board CRU, and its threads must be enabled by user actions. Additional processor
modules of the same revision are installed in CPU sockets 1-3 in rx6600 servers.
Processor Module Behaviors
All enabled CPUs and their threads almost immediately become functional after system power
is applied. Each thread is in a race to fetch their instructions from their CPU’s instruction and
data caches to complete early self test and rendezvous.
CPU/Memory/SBA
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