On 2017/05/03 09:09:37 +0900, Akira Yokosawa wrote:
> Hi Paul,
>
> While reviewing your recent update in "Hunting Heisenbugs" section,
> I found the analogy with particle physics didn't sit well with me.
>
> "Heisenbug" is defined as:
>
>> attempts to track down the heisenbug causes it to radically change
>> its symptoms or even disappear completely.
>
> "Anti-heisenbug" is introduced as:
>
>> Fortunately, particle physics is up to the task: Why not create
>> an anti-heisenbug to annihilate the heisenbug?
>
> At this point, "anti-heisenbug" seems to mean a patch that fixes
> the heisenbug.
>
> The use of anti-something in particle physics does not go along
> with this usage.
>
> For example, antiproton is an antiparticle of proton.
> antiproton has mostly the same property as proton,
> with the exception of electric charge and magnetic moment.
> Also, an antiproton and an antielectron (positron) can compose
> an antihydrogen atom. Well, I'm sure you know all about this.
>
> So, if you employ this line of reasoning, an anti-heisenbug should
> also be a bug with something opposite in nature.
>
> If a heisenbug is a bug which vanishes when it is being tracked down,
> an anti-heisenbug would be a bug which only emerges when it (or
> something else) is being tracked down.
>
> However, it is not obvious you can create an anti-heisenbug for
> a particular heisenbug so that when the two are combined, the symptoms
> of both bugs to "annihilate".
>
> So I'm wondering "What was Paul's intention in using the word 'annihilate'?".
>
> In Section "Add Delay", anti-heisenbug is used as:
>
>> Once you spot a bug involving a race condition, it is frequently
>> possible to create an anti-heisenbug by adding delay in this manner.
>
> This "anti-heisenbug" is not a bug, rather, it is a means to increase
> the possibility of a given heisenbug to appear.
>
Oops, I sent this prematurely.
But you might be able to see my point here.
This is not an important question, so please give it a look when you have
done with whatever issue you are working on.
Thanks, Akira
--
To unsubscribe from this list: send the line "unsubscribe perfbook" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
