[cfarm-users] Nice on GCC202?

Jeffrey Walton noloader at gmail.com
Fri Mar 9 00:44:59 CET 2018


On Thu, Mar 8, 2018 at 6:19 PM, Baptiste Jonglez
<baptiste at bitsofnetworks.org> wrote:
> Hi,
>
> On 08-03-18, Jeffrey Walton via cfarm-users wrote:
>> Hi Everyone,
>>
>> GCC202 is a Sparc64 machine. It has 16 cpus and each cpu has 16 cores
>> for a total of 256 virtual cpu's.
>
> Where did you see those 256 "virtual cpu's"?  According to htop,
> /proc/cpuinfo and https://cfarm.tetaneutral.net/machines/list/ it only has
> 16 "threads".

/sys/devices/system/cpu

> As far as I can remember, it's a virtual machine with only 2 CPU cores of
> the physical machine, each core having 8 "threads", although it seems to
> be quite different from Intel Hyperthreading.  Linux does not understand
> such subtleties and just sees each "thread" as a separate CPU.

/proc/cpuinfo shows 16 cpu's.

Related, do you know where the CPU freq is tucked away on Sparc64? It
is not in the places I usually look, like /proc/cpuinfo and
/sys/devices/system/cpu.

Jeff


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