Thread: [Hyperic-hq-discuss] How to get XEON CPU model number (e.g. 5530) from SIGAR API

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Hello,

Is it possible to get the XEON CPU model number (e.g. 5530) from SIGAR API?

If this is not possible, is there a way to extend SIGAR to get this kind of information?

Thanks,
Jean

Hi Jean,

It should be in the CpuInfo.getModel string:

java -jar lib/sigar.jar cpuinfo
Vendor.........Intel
Model..........Core(TM) i5 CPU         750  @ 2.67GHz

The downside of course would be parsing out the model number.  There are a few open source programs out there that use the cpuid instruction to get more fine grained detail.  But the ones I've seen are command-line exe's rather than libraries.  How about if you have a look around at some of those, let us know what you find and perhaps we could see about integrating into the Sigar API.

Thanks,
-Doug

Hello Dough, 

I will so research aboutthe programs you mentioned.

In the mean time these are some information.

Thanks,
Jean

Example #1 
Red Hat Linux - Intel Nehalem X5570 
java -jar sigar.jar cpuinfo
Vendor.........Intel
Model..........Xeon
Mhz............2933
Total CPUs.....16
Physical CPUs..1 -> WRONG it is 2 Physical CPU
Cores per CPU..16 -> WRONG is it 8 per CPU, 4 CORES with Hyperthreading.
Cache size....8192

Note: This is a 2 * CPU , so Physical CPU is wrong

cat /proc/cpuinfo
vendor_id       : GenuineIntel
cpu family      : 6
model           : 26
model name      : Intel(R) Xeon(R) CPU           X5570  @ 2.93GHz

Example #2 - Linux/Intel - Xeon X5460 
java -jar sigar.jar
sigar> cpuinfo
Vendor.........Intel
Model..........Xeon
Mhz............3158
Total CPUs.....8
Physical CPUs..2 -> OK
Cores per CPU..4 -> OK
Cache size....6144

cat /proc/cpuinfo
vendor_id       : GenuineIntel
cpu family      : 6
model           : 23
model name      : Intel(R) Xeon(R) CPU           X5460  @ 3.16GHz

Example #3- Solaris/Intel  X5460 

java -jar sigar.jar cpuinfo
Vendor.........Intel
Model..........x86
Mhz............3159
Total CPUs.....8
Physical CPUs..2 -> OK
Cores per CPU..4 -> OK

prtconf -v
                name='brand-string' type=string items=1
                    value='Intel(r) Xeon(r) CPU           X5460  @ 3.16GHz'

With respect to your observations about the sigar api, these are actually
due to modifications to cpuid in the nehalem processor, these
are documented in:

http://www.intel.com/assets/pdf/appnote/241618.pdf

This requires sigar_cpu_core_count to be modified along the lines
of sigar->lcpu = (id.ebx & 0x7E000000) >> 25

Thread: [Hyperic-hq-discuss] How to get XEON CPU model number (e.g. 5530) from SIGAR API

hyperic-hq-discuss