[ale] Linux kernel

[Jon "maddog" Hall]

Hi,

It has been a LONNNNGGGG time since I did any kernel work on any operating
system, but I will point out that scheduling a PROCESS (which has
associated with it memory, etc.) and scheduling a THREAD (which is very
lightweight and is typically "only" an additional core) are two different
beasts.

Unless you have your process swapped in and your memory set to go it will
not make any difference how many cores you have in the CPU.   On the other
hand I have seen programs where ONE process could keep hundreds of cores
(threads) busy.

Just sayin'

md

On Wed, Nov 15, 2023 at 12:25 PM Niel Bornstein via Ale <ale at ale.org> wrote:

> One of my engineers pointed me to this Reddit thread.
>
>
> https://www.reddit.com/r/linux/comments/17uzzt3/comment/k978mr7/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
>
> On Wed, Nov 15, 2023 at 12:01 PM Boris Borisov via Ale <ale at ale.org>
> wrote:
>
>> If glanced over that this morning.
>>
>>
>> https://thehftguy.com/2023/11/14/the-linux-kernel-has-been-accidentally-hardcoded-to-a-maximum-of-8-cores-for-nearly-20-years/
>>
>> Don't shoot I'm just the messenger.
>>
>> That is why I'm asking if someone knows something.
>>
>> My daily driver is an old E8400 so I just really asked from curiosity.
>>
>> On Wed, Nov 15, 2023, 10:06 Jim Kinney via Ale <ale at ale.org> wrote:
>>
>>> ??? Got a cluster with 128 cores per node, 64 physical cores on both
>>> cpus, and they are all in use constantly. Got a specific kernel version or
>>> patch?
>>>
>>> On Wed, Nov 15, 2023, 9:13 AM Boris Borisov via Ale <ale at ale.org> wrote:
>>>
>>>> Read somewhere today that linux kernel has been accidentally locked to
>>>> 8 cores.
>>>>
>>>> Anyone to collaborate.
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