RFE: Increase NR_CPUS to 4096

[Prarit Bhargava]

On 07/15/2013 01:33 PM, "Jóhann B. Guðmundsson" wrote:
> On 07/15/2013 05:21 PM, Prarit Bhargava wrote:
>> I've done some testing across various systems (both "large" and "small").
>> Increasing NR_CPUS seems to have a negligible effect.  I see about a 1.1M
>> increase in memory usage when switching between 128 cpus and 5120 cpus.  Since
>> most systems ship with 4G or more these days, I cannot see an issue with
>> consuming a small amount of memory like this.
>>
>> The current NR_CPUS in Fedora is 128 and the current NR_CPUS in RHEL7 is 5120.
>> I do not see any reason that those values have to be different anymore.
>>
>> Thoughts/concerns?
> 
> I guess the question here is anyone aware of anyone running Fedora with 128

Yes - me.  And I have HW that exceeds that number.

> cpu's or for that matter 5120.

Yes -- Russ, care to share some numbers?

P.