The future of "frozen" types as the number of CPU cores increases

[mk]

sjdevnull at yahoo.com wrote:
> On Feb 20, 9:58 pm, John Nagle <na... at animats.com> wrote:
>> sjdevn... at yahoo.com wrote:
>>> On Feb 18, 2:58 pm, John Nagle <na... at animats.com> wrote:
>>>>     Multiple processes are not the answer.  That means loading multiple
>>>> copies of the same code into different areas of memory.  The cache
>>>> miss rate goes up accordingly.
>>> A decent OS will use copy-on-write with forked processes, which should
>>> carry through to the cache for the code.
>>     That doesn't help much if you're using the subprocess module.  The
>> C code of the interpreter is shared, but all the code generated from
>> Python is not.

> Of course.  Multithreading also fails miserably if the threads all try
> to call exec() or the equivalent.

> It works fine if you use os.fork().

What about just using subprocess module to run system commands in worker 
threads? Is this likely to have problems?

Regards,
mk