Re: [PATCH v1 12/18] tests/vm: allow us to take advantage of MTTCG

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> On 6/22/20 7:31 AM, Alex Bennée wrote:
>>          if kvm_available(vmcls.arch):
>>              return multiprocessing.cpu_count() // 2
>> +        elif os.uname().machine == "x86_64" and \
>> +             vmcls.arch in ["aarch64", "x86_64", "i386"]:
>> +            # MTTCG is available on these arches and we can allow more cores.
>> +            # But only up to a reasonable limit. User can always override
>> +            # these limits with --jobs.
>> +            return min(multiprocessing.cpu_count() // 2, 8)
>>          else:
>
> And if multiprocessing.cpu_count() == 1?
> Seems like we should add max(count, 1) as well.

As it also affects KVM:

    def get_default_jobs():
        if multiprocessing.cpu_count > 1:
            if kvm_available(vmcls.arch):
                return multiprocessing.cpu_count() // 2
            elif os.uname().machine == "x86_64" and \
                 vmcls.arch in ["aarch64", "x86_64", "i386"]:
                # MTTCG is available on these arches and we can allow more cores.
                # But only up to a reasonable limit. User can always override
                # these limits with --jobs.
                return min(multiprocessing.cpu_count() // 2, 8)
        else:
            return 1


>
>
> r~


-- 
Alex Bennée