Re: parallell execution

That's exactly what ticks are for. Stig discussed them on php-dev lately. Zeev On 31 Aug 2000, Manuel Lemos wrote: > 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: http://phpclasses.UpperDesign.com/?user=mlemos@acm.org > -- > E-mail: mlemos@acm.org > URL: http://www.mlemos.e-na.net/ > PGP key: http://www.mlemos.e-na.net/ManuelLemos.pgp > -- > > > -- Zeev Suraski <zeev@zend.com> http://www.zend.com/