Re: 4 of 8 cores always idle on Ryzen 7 4750U Pro

Stuart Henderson <stu@spacehopper.org> writes:

> On 2020/11/07 23:24, Ashton Fagg wrote (on bugs@):
>>
>> I'm running a Ryzen 4750U (8 cores, 16 with SMT). Obviously SMT
>> being disabled means only 8 of them show up in htop and the
>> like. However, I've noticed that 4 of my cores are always
>> idle. They never, ever leave 0% usage no matter what I do -
>> running stress tests, running make with -j8, doesn't matter,
>> only 4 cores ever have usage >0.
>
> Does this help?

Hi Stuart,

Apologies for the belated reply.

I just tested this on my Ryzen machine and can confirm that it does fix
the issue with only half of the active cores being shown - screenshots
attached. Tested with `stress -c 8` as in my original report.

Thanks,

Ash