how to get the number of sockets

Tue Aug 18 12:58:53 UTC 2009

DMI type 7 looks like CPU cache information.  DMI type 4 is the actual
processor information, but from what you've indicated, it doesn't report
empty sockets.  

http://linux.die.net/man/8/dmidecode

On my machines, I get this as one of the type 7 entries.
        DMI type 7, 19 bytes.
        Cache Information
                Socket Designation: Processor 1 Internal L1 Cache
                Configuration: Enabled, Not Socketed, Level 1
                Operational Mode: Write Back
                Location: Internal
                Installed Size: 8 KB
                Maximum Size: 32 KB
                Supported SRAM Types:
                        Burst
                Installed SRAM Type: Burst
                Speed: Unknown
                Error Correction Type: Unknown
                System Type: Unknown
                Associativity: 4-way Set-associative

Maarten Broekman 

>  -----Original Message-----
>  From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>  bounces at redhat.com] On Behalf Of Marti, Rob
>  Sent: Tuesday, August 18, 2009 8:53 AM
>  To: General Red Hat Linux discussion list
>  Subject: RE: how to get the number of sockets
>  
>  Weird...
>  
>  Handle 0x0700, DMI type 7, 19 bytes
>  Cache Information
>          Socket Designation: Not Specified
>          Configuration: Enabled, Not Socketed, Level 1
>          Operational Mode: Write Back
>          Location: Internal
>          Installed Size: 32 kB
>          Maximum Size: 32 kB
>          Supported SRAM Types:
>                  Other
>          Installed SRAM Type: Other
>          Speed: Unknown
>          Error Correction Type: None
>          System Type: Data
>          Associativity: 8-way Set-associative
>  
>  Handle 0x0701, DMI type 7, 19 bytes
>  Cache Information
>          Socket Designation: Not Specified
>          Configuration: Enabled, Not Socketed, Level 2
>          Operational Mode: Varies With Memory Address
>          Location: Internal
>          Installed Size: 4096 kB
>          Maximum Size: 4096 kB
>          Supported SRAM Types:
>                  Other
>          Installed SRAM Type: Other
>          Speed: Unknown
>          Error Correction Type: Single-bit ECC
>          System Type: Unified
>          Associativity: <OUT OF SPEC>
>  
>  No idea which is referring to the empty socket and what the other one
>  is...
>  
>  Rob Marti
>  Systems Administrator
>  Sam Houston State University
>  936-294-3804 // rob at shsu.edu
>  
>  
>  -----Original Message-----
>  From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>  bounces at redhat.com] On Behalf Of Broekman, Maarten
>  Sent: Tuesday, August 18, 2009 7:47 AM
>  To: General Red Hat Linux discussion list
>  Subject: RE: how to get the number of sockets
>  
>  On the systems I have "Socket Designation" ends up only giving CPU
>  sockets.  A more contextual grep (or simply dumping it to more/less)
>  might give more information about what it thinks is a "socket".
>  
>  Maarten Broekman
>  
>  
>  >  -----Original Message-----
>  >  From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>  > bounces at redhat.com] On Behalf Of Marti, Rob
>  >  Sent: Tuesday, August 18, 2009 8:45 AM
>  >  To: General Red Hat Linux discussion list
>  >  Subject: RE: how to get the number of sockets
>  >
>  >  My desktop's motherboard only has 2 sockets, but your command
gives:
>  >
>  >  [root at ab1-4-160 ~]# dmidecode | grep "Socket Designation"
>  >          Socket Designation: CPU
>  >          Socket Designation: Not Specified
>  >          Socket Designation: Not Specified
>  >
>  >  Not really sure that's accurate enough :) (and yeah I only have 1
>  socket
>  >  filled... I feel like less of a man)
>  >
>  >  Rob Marti
>  >
>  >  -----Original Message-----
>  >  From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>  > bounces at redhat.com] On Behalf Of Broekman, Maarten
>  >  Sent: Tuesday, August 18, 2009 7:41 AM
>  >  To: General Red Hat Linux discussion list
>  >  Subject: RE: how to get the number of sockets
>  >
>  >  /usr/sbin/dmidecode will give you similar information as well.
>  >
>  >  # dmidecode | grep "Socket Designation"
>  >                  Socket Designation: Proc 1
>  >                  Socket Designation: Proc 2 ...
>  >
>  >
>  >  Maarten Broekman
>  >
>  >  >  -----Original Message-----
>  >  >  From: redhat-list-bounces at redhat.com [mailto:redhat-list-  >
>  > bounces at redhat.com] On Behalf Of Marti, Rob  >  Sent: Tuesday,
August
>  > 18, 2009 8:38 AM  >  To: General Red Hat Linux discussion list  >
>  > Subject: RE: how to get the number of sockets  >  >  Check
>  > manufacturers specs.  There isn't a software way to check
>  for
>  >  an
>  >  >  empty cpu - I'm guessing you meant empty because /proc/cpuinfo
>  tells
>  >  you
>  >  >  how mant slots are full.
>  >  >
>  >  >  grep physical /proc/cpuinfo | uniq -c
>  >  >        4 physical id     : 0
>  >  >        4 physical id     : 1
>  >  >
>  >  >  So 4 cores on each of 2 sockets.
>  >  >
>  >  >  Rob Marti
>  >  >  Systems Administrator
>  >  >  Sam Houston State University
>  >  >  936-294-3804 // rob at shsu.edu
>  >  >
>  >  >
>  >  >  -----Original Message-----
>  >  >  From: redhat-list-bounces at redhat.com [mailto:redhat-list-  >
>  > bounces at redhat.com] On Behalf Of ESGLinux  >  Sent: Tuesday, August
>  > 18, 2009 7:32 AM  >  To: General Red Hat Linux discussion list  >
>  > Subject: how to get the number of sockets  >  >  Hi all,  >  I was
>  > going to by a red hat license for a new server, an looking
>  the
>  >  >  note1 in this link:
>  >  >  https://www.redhat.com/apps/store/server/#note1
>  >  >
>  >  >  I have reallized that the important thing is the number of
>  sockets,
>  >  not
>  >  >  the number of cpus.
>  >  >
>  >  >  So my question is simple, how can I get the number of sockets a
>
>  > motherboard has, ?(without opening it. of coures)  >  >  I have
look
>  > at the /proc dir but I get only info about the cpus,
>  not
>  >  > about the sockets,
>  >  >
>  >  >  any suggestion,
>  >  >
>  >  >  Thanks in advance
>  >  >
>  >  >  ESG
>  >  >  --
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