Solaris

How can I tell how many cpu's are on a solaris 9 sunfire?

this will give you the details for all the processors

psrinfo -v

Another way to have a look at your hardware is the tool "prtdiag" with the "-v" command switch to display even more information about the server.

To have a server type specific prtdiag you can run :

/platform/`uname -i`/sbin/prtdiag -v

But normally a simple "prtdiag -v" should do the job :

Below is some sample output from some of my "play-around" servers :


# prtdiag -v
System Configuration: Sun Microsystems sun4u 5-slot Sun Enterprise E3500
System clock frequency: 100 MHz
Memory size: 2048Mb

========================= CPUs =========================

Run Ecache CPU CPU
Brd CPU Module MHz MB Impl. Mask
--- --- ------- ----- ------ ------ ----
7 14 0 400 8.0 US-II 10.0
7 15 1 400 8.0 US-II 10.0
9 18 0 400 8.0 US-II 10.0
9 19 1 400 8.0 US-II 10.0

# prtdiag -v
System Configuration: Sun Microsystems sun4u 8-slot Sun Enterprise E4500/E5500
System clock frequency: 100 MHz
Memory size: 3072Mb

========================= CPUs =========================

Run Ecache CPU CPU
Brd CPU Module MHz MB Impl. Mask
--- --- ------- ----- ------ ------ ----
0 0 0 400 8.0 US-II 10.0
0 1 1 400 8.0 US-II 10.0


Greets

Solaris 9 (possibly in a patch) added the -p option to psrinfo to distinguish between physical processors and cores. UltraSPARC IV and IV+ CPU's have two cores per processor - psrinfo and psrinfo -v will display each core as a processor, possibly leading to confusion. psrinfo -vp will help clear this up.

Things get really confusing when you have a T2000 or T1000 (Solaris 10 and later only...) with one CPU that has 8 cores with 4 cores per thread. psrinfo will tell you that this little 1U or 2U box has 32 processors. psrinfo -vp will help you figure out how many CPU sockets are in use and how the cores/threads (strands) map to the physical processor.

Rumor (http://www.theregister.co.uk/2006/04/13/sun_refresh/) has it that the next generation will confuse this a bit more as you need to look at multiple (2?, 4?, more?) sockets, each sporting 64 threads. Time to beef up the scrollback buffer of your terminal if you want to look at all the output of psrinfo -v.