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Date: Tue, 28 Feb 2012 10:13:23 +0100
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To: "William A. Rowe Jr." <wrowe@rowe-clan.net>
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Subject: Re: [PHP-DEV] pecl, zts, non-zts, fastcgi and Apache
From: jpauli@php.net (jpauli)

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On Mon, Feb 27, 2012 at 10:12 PM, William A. Rowe Jr.
<wrowe@rowe-clan.net>wrote:

> On 2/27/2012 6:58 AM, jpauli wrote:
> > PHP through mod_php on Linux should compile without ZTS.
> >
> > configure script searches for apxs binary and tries to invoque "apxs -q
> > MPM" to figure out what MPM has been compiled in Apache for the TS flag
> to
> > be defined or not (thus, activating PHP ZTS, or not).
>
> Right...
>
> > Mainly on Linux, Apache should have been installed with prefork MPM ans
> > "apxs -q" should return that, then configure should not define
> > PHP_BUILD_THREAD_SAFE.
>
> No, 2.2 and 2.4 don't default to prefork, it's suboptimal, most linux
> distros have moved away from it...
>
> Sorry but 2.2 defaults to prefork.
The new 2.4 platform has introduced loadable MPM, like any other module ,
thus we cant detect through
apxs which MPM is used anymore. For this, we would need to play with httpd
-M



> > Recently we had a bug with the new Apache 2.4 API where apxs doesn't
> answer
> > about the MPM configuration anymore, leading to a ZTS build by default.
> > This bug has now been fixed, was https://bugs.php.net/bug.php?id=61172.
>
> Wrong fix.  Out of the box you don't know which mpm may be loaded, because
> the mpm is now loadable (although a full daemon stop/start is necessary).
> The only mod_php loadable under any circumstance is TS enabled.
>

Yes, but ZTS has a performance/memory penalty due to globals locks.
I would much prefer having a nonZTS PHP together with a non threaded MPM

Julien.P


> If you want php/linux single-child, fastcgi is the only rational approach.
>
> > I dont know anything about windows, sorry
>
> Always threaded.
>
>
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