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max CPUs and Cores per Cell in a SD

 
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Jdamian
Respected Contributor

max CPUs and Cores per Cell in a SD

Hi

How many CPUs and Cores can a single SD cell have? The SD is a PA-RISC SD.

My SD partition have 4 cells. Each one has 4 CPUs PA-RISC 8800 (i.e., 8 cores).

The CSTM displays in each cell there are CPU slots empty:

CPU Info for Cell#....: 0
Max CPUs.........: 8
CPU Clock Domain.: 0
IODC_HVERSION....: 0x8800
cpu -------------------------------------------------
num |00|01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|
cpu -------------------------------------------------
slot | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
-------------------------------------------------
state| c | c | c | c | s | s | s | s |
-------------------------------------------------
c - cpu is present and configured
d - cpu is present and deconfigured (CPU has failed)
s - cpu slot empty

Note that for each CPU slot there are 2 "CPU num" and there are 4 CPU slots empty

Can I add other 4 PA-8800 CPUs (8 Cores) to each cell?

I'm confused because my team mates say the maximum number of CPUs per cell is 4 and because parstatus reports the maximum is 8:

[Cell]
CPU Memory Use
OK/ (GB) Core On
Hardware Actual Deconf/ OK/ Cell Next Par
Location Usage Max Deconf Connected To Capable Boot Num
========== ============ ======= ========= =================== ======= ==== ===
cab0,cell0 Active Core 8/0/8 16.0/0.0 cab0,bay1,chassis3 yes yes 0
cab0,cell1 Active Base 8/0/8 16.0/0.0 - no yes 0
cab0,cell2 Active Base 8/0/8 16.0/0.0 - no yes 0
cab0,cell3 Active Base 8/0/8 16.0/0.0 - no yes 0





8 REPLIES 8
Sherif A. Louis
Valued Contributor
Solution

Re: max CPUs and Cores per Cell in a SD

PA8800 is a dual core processor
and yes the cstm shows a 8 CPUs for Cell #0 and physically the cell can only carry 4 Processor modules.
Torsten.
Acclaimed Contributor

Re: max CPUs and Cores per Cell in a SD

Each cell has space for 4 CPU modules, if they are dual-cores, you can have up to 8 cores on a single cell (Max CPUs.........: 8).

The cstm output is using the same table for all servers, this does not mean you have more free slots on a cell.

Hope this helps!
Regards
Torsten.

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Torsten.
Acclaimed Contributor

Re: max CPUs and Cores per Cell in a SD

Some (older) non-cell based servers can have more CPUs and slots, it would look like this (this is a N4000 server):

CPU Information:
Number of CPUs in the system = 8

CPU Map
cpu -----------------------------------------
slot | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
state|caM |ca |ca |ca |ca |ca |ca |ca |
-----------------------------------------
| 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
state| | | | | | | | |
-----------------------------------------

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

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Jdamian
Respected Contributor

Re: max CPUs and Cores per Cell in a SD

Then, CSTM cannot differentiate a SD cell from a non-partitionable main board and displays unaccurate info?
Torsten.
Acclaimed Contributor

Re: max CPUs and Cores per Cell in a SD

Everything is accurate, only the table is a bit too large.

Your system says

CPU Info for Cell#....: 0
Max CPUs.........: 8

Your cell 0 can have up to 8 cores (4 modules) and this is what you have.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

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No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!