Partners & Affiliates

Re: [PHP-DEV] parallell execution From: Manuel Lemos (mlemos <email protected>)
Date: 08/31/00

Hello Andi,

On 30-Aug-00 15:00:44, you wrote:

>> > I heard that Perl has (will have?) a pool of interpreters read to run
>> > scripts in the Apache 2 multi-threaded environment. This means that for
>> > each Apache process there will be spare interpreters ready to run scripts
>> > threads.
>> >
>> > Anyway, I think that the lack of support to start new script
>> > processes/threads is one of the remaining things that PHP lacks and in
>> > some cases makes it an inferior solution when compared to Perl and Java
>> > servlets.
>>
>>I agree. Tcl has a beautifully clean C interface in that respect (at
>>least it did back in the 7.3 days when I last touched it :-).
>>
>>It doesn't sound like this is too far away for PHP. We already
>>support(?) multithreaded servers, so it's already possible to have
>>several scripting engines running in a single process. However, usually
>>when I assume things like this, Zeev or Andi can point out why this
>>makes hell break loose. :-)

>It is extremely hard to implement it and it would slow things down
>considerably because we would need to use lots and lots of mutexes in
>hundreds of places.
>We did however add ticks support which gives you some kind of ability to do
>background processing for slow things (i.e. opening sockets) so if it is
>used wisely it could be used quite nicely.

I'm not sure what you mean by ticks. Anyway, I was not necessarily
suggesting a true preemptive multi-tasking environment with fork() or
lightweight threads but rather something that at least would switch between
PHP execution environment contexts when one of them goes idle, for instance
while executing blocking operations like I/O operations (files, sockets,
whatever).

Regards,
Manuel Lemos

Web Programming Components using PHP Classes.
Look at: email protected>?subject=Re:%20[PHP-DEV]%20parallell%20execution&replyto=2055.278T2972T9915613mlemos <email protected>">mlemos <email protected>">http://phpclasses.UpperDesign.com/?user=mlemos <email protected> 

--
E-mail: mlemos <email protected>
URL: http://www.mlemos.e-na.net/
PGP key: http://www.mlemos.e-na.net/ManuelLemos.pgp
--

-- 
PHP Development Mailing List <http://www.php.net/>
To unsubscribe, e-mail: php-dev-unsubscribe <email protected>
For additional commands, e-mail: php-dev-help <email protected>
To contact the list administrators, e-mail: php-list-admin <email protected>