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To: "'Dmitry Stogov'" <dmitry@zend.com>,
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	"'Xinchen Hui'" <xinchen.h@zend.com>
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Date: Wed, 26 Oct 2016 15:47:07 +0200
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Subject: RE: [PHP-DEV] JIT for PHP project
From: anatol.php@belski.net ("Anatol Belski")

Hi Dmitry,

Thanks for the info. Probably I'm just too curious :) Please count on me
once it becomes relevant to hand out some part.

Regards

Anatol

> -----Original Message-----
> From: Dmitry Stogov [mailto:dmitry@zend.com]
> Sent: Wednesday, October 26, 2016 1:31 PM
> To: Anatol Belski <anatol.php@belski.net>; 'PHP internals list'
> <internals@lists.php.net>
> Cc: Zeev Suraski <zeev@zend.com>; Xinchen Hui <xinchen.h@zend.com>
> Subject: Re: [PHP-DEV] JIT for PHP project
> 
> Hi Anatol,
> 
> 
> The project is in the very early development stage.
> 
> Now, JIT passes almost all PHPT tests, makes 3 times speed-up on bench.php
> and no significant difference on real-life apps (+/-5% depended on
opcache.jit
> setting.
> 
> We are hardly working, implementing new ideas...
> 
> 
> I think it's too early to port this to Windows. Once, we think, we are
ready, I'll
> ask your help.
> 
> I suppose we won't need ELF->COFF porting, because we construct ELF
objects
> just to debug JITed code in GDB and read PHP ELF object for simple symbol
> resolution in disassembler (most probably, both won't work on Windows
> anyway).
> 
> zend_jit_x86.dasc will have to be adopted to support Windows calling
> convention, of course.
> 
> 
> Thanks. Dmitry.
> 
> 
> 
> 
> 
> ________________________________
> From: Anatol Belski <anatol.php@belski.net>
> Sent: Wednesday, October 26, 2016 1:49:49 PM
> To: Dmitry Stogov; 'PHP internals list'
> Cc: Zeev Suraski; Xinchen Hui
> Subject: RE: [PHP-DEV] JIT for PHP project
> 
> Hi Dmitry,
> 
> > -----Original Message-----
> > From: Dmitry Stogov [mailto:dmitry@zend.com]
> > Sent: Thursday, September 1, 2016 1:57 PM
> > To: PHP internals list <internals@lists.php.net>
> > Cc: Zeev Suraski <zeev@zend.com>; Xinchen Hui <xinchen.h@zend.com>
> > Subject: [PHP-DEV] JIT for PHP project
> >
> > Hi @internals,
> >
> > I'm glad to say that we have started a new JIT for PHP project and
> > hope to deliver some useful results for the next PHP version (probably
8.0).
> > We are very early in the process and for now there isn't any real
> performance
> > improvement yet.  So far we spent just 2 weeks mainly working on JIT
> > infrastructure for x86/x86_64 Linux (machine code generation,
> disassembling,
> > debugging, profiling, etc), and we especially made the JIT
> > code-generator
> as
> > minimal and simple as possible. The current state, is going to be used
> > as
> a
> > starting point for research of different JIT approaches and their
> usability for PHP.
> >
> > The code is available at:
> > https://github.com/zendtech/php-src/tree/jit-
> > dynasm/ext/opcache/jit
> >
> > The sources may be built and tested as regular PHP (no any special
> external
> > dependencies required).
> > JIT itself is implemented as a part of Opcache.
> > You may try it in action:
> >
> > sapi/cli/php -d opcache.jit_buffer_size=32M Zend/bench.php
> > sapi/cli/php -d opcache.jit_buffer_size=32M -d opcache.jit_debug=1
> > Zend/bench.php 2>&1 | less
> >
> > As I mentioned we didn't try to achieve any real performance
> > improvement
> yet,
> > although we do currently see 20% speedup on bench.php, but a bit of a
> > slowdown on real-life apps.
> >
> > Wish us luck :)
> >
> I just wanted to ask about the status. After starting to do some basic
work
>
https://github.com/zendtech/php-src/compare/jit-dynasm...weltling:jit-dynasm
> I've stumbled upon a couple of things
> 
> - in zend_elf.c, the current binary that loads php is being read in, I
guess this part
> needs to be ported to parse the Windows COFF format
> - with DynASM, seems zend_jit_x86.dasc will need to be extended for some
> compatibility, please correct if I'm wrong
> 
> Regarding these, maybe you've one or another tip for me? Is this still
relevant?
> Or I jump into it too early?
> 
> Thanks
> 
> anatol
> 
>