Re: php and multithreading (additional arguments)

On Fri, Apr 2, 2010 at 9:30 AM, Lester Caine <lester@lsces.co.uk> wrote: > Jille Timmermans wrote: > >> Op 2-4-2010 7:16, Andi Gutmans schreef >> >>> I think that if we were ever to implement threading we would be best off >>> to enable spawning worker threads that have their own context with no >>> shared data (and therefore no requirement for locking). We could then >>> have a message passing API between the threads. >>> Advantages: >>> - Real multi-threading. >>> - Simple straightforward approach which doesn't require a comp. sci. >>> degree to use correctly. >>> - Very stable implementation. >>> >> That sounds like "I want threading; because it sounds cool!". What are >> the advantages of this above multi-process? >> The systemcall-overhead for message passing? >> > > Actually Andi's outline forms a nice simple base for something practical. > It simply builds on the 'background' threading required to run asynchronous > operations while not creating a unmanageable mess. But I still can't see any > need to go beyond perhaps asynchronous SQL queries. > > Or asynchronous exec, or asynchronous(or at least timout aware) gethostbyaddr, see: http://bugs.php.net/bug.php?id=51306 So any task, that require waiting on external resource could be executed in paralel. http://hu2.php.net/manual/en/mysqli.reap-async-query.php its a good thing, that you can async mysql execution with mysqlnd. Tyrael > It still requires that all the non-thread safe code is addressed first? > Even if that simply means disabling extensions that are not safe? > > > And why did nobody mention Aprils Fools yesterday; when the >> request-for-threading was sent ;) >> > Because it was after noon when it was sent ;) > > > -- > Lester Caine - G8HFL > ----------------------------- > Contact - http://lsces.co.uk/wiki/?page=contact > L.S.Caine Electronic Services - http://lsces.co.uk > EnquirySolve - http://enquirysolve.com/ > Model Engineers Digital Workshop - http://medw.co.uk// > Firebird - http://www.firebirdsql.org/index.php > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > >