Re: Concurrency via isolated process/thread

[Ihor Radchenko]

Po Lu <luangruo@yahoo.com> writes:

>> I understood that figure and the associated section differently.
>> Do you have some kind of reference showing the performance of
>> READ_ONCE/WRITE_ONCE?
>
> The figure is titled ``Figure 5.1: Atomic Increment Scalability on
> x86''.  The surrounding text and source code listings make the
> comparison taking place unambiguous.

Sure, but the whole chapter design shows that READ_ONCE/WRITE_ONCE is
not the best design. They go deep and complex just to avoid using it too
much.

That said, the chapter is dealing with increments specifically and
frequent writes.

In Elisp, we will deal with frequent writes into symbol objects, but
probably not into conses and other non-vectorlike objects.

>> If we need less interlocks, it will certainly make things easier, but I
>> do not want to run into hard-to-debug bugs caused by data races.
>
> And you won't, if you run your program on a machine Emacs currently
> supports.

Ok. I will take your word for granted.

-- 
Ihor Radchenko // yantar92,
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