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Posted to users@httpd.apache.org by Eric Covener <co...@gmail.com> on 2009/02/11 17:34:11 UTC
Re: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby..
thread safe?
On Wed, Feb 11, 2009 at 11:08 AM, howard chen <ho...@gmail.com> wrote:
> But I just wonder, isn't all mod_php/mod_python/mod_perl/mod_ruby are
> relying on the same set of popular 3rd party libraries? e.g. zlib,
> libxml, expat, iconv....so the above statement is also true in
> mod_python/mod_perl/mod_ruby?
>
> So it turn out that Threaded MPM is only suitable for serving static pages?
Bizarre conclusion. Other interpreters are likely more
thread-aware/thread-exploitative when not embedded in Apache, so
they'd be less likely to casually link with non-threadsafe libraries.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby..
thread safe?
Posted by "William A. Rowe, Jr." <wr...@rowe-clan.net>.
howard chen wrote:
> On Thu, Feb 12, 2009 at 12:34 AM, Eric Covener <co...@gmail.com> wrote:
>
>> Bizarre conclusion. Other interpreters are likely more
>> thread-aware/thread-exploitative when not embedded in Apache, so
>> they'd be less likely to casually link with non-threadsafe libraries.
>>
>
> Why? Since if mod_php has thread safety problem with Apache2 worker
> MPM, mod_python/mod_ruby should also have these problem, isn't?
>
> Othwsie, it is the PHP team over worry about the problem?
Agreed. This is the standard PHP team FUD that they don't grok threading
and don't have the capacity to determine which libraries are thread safe
(and under what conditions).
It's 2009, so I don't expect this to change before PHP ceases to be
relevant.
FWIW, in most applications it's thread safety is just fine. But this
can't be said if Apache ever becomes free-threaded, as opposed to just
threaded on a dedicated worker - too many cases where TLS is used in
the various libs that rely on a task not jumping threads. There's also
little guarantee that multiple PHP interpreters can exist on a thread,
e.g. if the filter + handler are both used.
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Re: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby..
thread safe?
Posted by Eric Covener <co...@gmail.com>.
On Thu, Feb 12, 2009 at 10:02 AM, howard chen <ho...@gmail.com> wrote:
> On Thu, Feb 12, 2009 at 12:34 AM, Eric Covener <co...@gmail.com> wrote:
>
>> Bizarre conclusion. Other interpreters are likely more
>> thread-aware/thread-exploitative when not embedded in Apache, so
>> they'd be less likely to casually link with non-threadsafe libraries.
>>
>
> Why? Since if mod_php has thread safety problem with Apache2 worker
> MPM, mod_python/mod_ruby should also have these problem, isn't?
They're different code with different build systems. I don't think
it immediately follows that they'd all have thread-safety problems.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby.. thread safe?
Posted by Matus UHLAR - fantomas <uh...@fantomas.sk>.
> On Thu, Feb 12, 2009 at 12:34 AM, Eric Covener <co...@gmail.com> wrote:
> > Bizarre conclusion. Other interpreters are likely more
> > thread-aware/thread-exploitative when not embedded in Apache, so
> > they'd be less likely to casually link with non-threadsafe libraries.
On 12.02.09 23:02, howard chen wrote:
> Why? Since if mod_php has thread safety problem with Apache2 worker
> MPM, mod_python/mod_ruby should also have these problem, isn't?
Only if they use the same non-thread-safe libraries.
such codes can have internal ways for avoiding such problems but I doubt any
does, it's pita to code such thing.
--
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
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Re: [users@httpd] Threaded MPM + mod_php/mod_python/mod_perl/mod_ruby..
thread safe?
Posted by howard chen <ho...@gmail.com>.
On Thu, Feb 12, 2009 at 12:34 AM, Eric Covener <co...@gmail.com> wrote:
> Bizarre conclusion. Other interpreters are likely more
> thread-aware/thread-exploitative when not embedded in Apache, so
> they'd be less likely to casually link with non-threadsafe libraries.
>
Why? Since if mod_php has thread safety problem with Apache2 worker
MPM, mod_python/mod_ruby should also have these problem, isn't?
Othwsie, it is the PHP team over worry about the problem?
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