Hudratronium commented on issue #6680:
URL: https://github.com/apache/cloudstack/issues/6680#issuecomment-1234492354
@shwstppr
Will try to give as much inforamtion as possible:
lscpu
~~~
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 48 bits physical, 48 bits virtual
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s) per core: 2
Core(s) per socket: 24
Socket(s): 1
NUMA node(s): 1
Vendor ID: AuthenticAMD
CPU family: 25
Model: 1
Model name: AMD EPYC 7413 24-Core Processor
Stepping: 1
Frequency boost: enabled
CPU MHz: 2892.925
CPU max MHz: 2650.0000
CPU min MHz: 1500.0000
BogoMIPS: 5289.83
Virtualization: AMD-V
~~~
virsh nodeinfo
~~~
CPU model: x86_64
CPU(s): 48
CPU frequency: 1494 MHz
CPU socket(s): 1
Core(s) per socket: 24
Thread(s) per core: 2
NUMA cell(s): 1
Memory size: 263476088 KiB
~~~
virsh sysinfo
~~~
<sysinfo type='smbios'>
<processor>
<entry name='socket_destination'>CPU1</entry>
<entry name='type'>Central Processor</entry>
<entry name='family'>Zen</entry>
<entry name='manufacturer'>AMD</entry>
<entry name='signature'>Family 25, Model 1, Stepping 1</entry>
<entry name='version'>AMD EPYC 7413 24-Core Processor</entry>
<entry name='external_clock'>2000 MHz</entry>
<entry name='max_speed'>3900 MHz</entry>
<entry name='status'>Populated, Enabled</entry>
<entry name='serial_number'>Not Specified</entry>
<entry name='part_number'>Not Specified</entry>
</processor>
</sysinfo>
~~~
virsh capabilities
~~~
<capabilities>
<host>
<cpu>
<arch>x86_64</arch>
<model>EPYC-Rome</model>
<vendor>AMD</vendor>
<microcode version='167776605'/>
<counter name='tsc' frequency='2645030000'/>
<topology sockets='1' cores='24' threads='2'/>
<pages unit='KiB' size='4'/>
<pages unit='KiB' size='2048'/>
<pages unit='KiB' size='1048576'/>
</cpu>
</host>
</capabilities>
~~~
The problem in this case might be, that the availeable output seems to
connected to the used module for the cpu. As mentioned above lscpu using the
`intel_pstate` module will give different sets of results. Currently, as i am
using a standard Ubuntu Server 20.04.5, the out-of-the-box used module is
`acpi-cpufreq`. Which supports the `CPU max MHz`. On the horizon, when the
kernel version 5.17 will be used, out-of-the-box we shall see the module
`amd_pstat`...
I don't know how important the "out-of-the-box" CPU discovery is for the
cloudstack agent. Guess there would be a little script needed to check the
loaded module and then "query" the intended value... How ever - depending on
how important this is.
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