Hi Dmitry. is this improvemnt (intruction reduce and memory read reduce) preserved under "strong" compiler optimization (-O2, -O3) ? is it something that the compiler can not automatically optimize ? anyhow, the patch seems impressive...
On Monday, December 03, 2012 11:35:52 AM Dmitry Stogov wrote: > The new proposed patch: http://pastebin.com/pj5fQTfN > > Now both execute_data->Ts and execute_data->CVs are removed and > corresponding temporary and compiled variables accessed using > "execute_data" as the base pointer. Temporary variables allocate directly > before the "execute_data" in reverse order and compiled variables right > after. So they can be accessed without any additional computations. The > patch reduces the number of executed instructions and number of memory > reads (about 8% less). > > I'm going to commit the patch on Tuesday. > > Thanks. Dmitry. > > On Mon, Dec 3, 2012 at 9:47 AM, Dmitry Stogov <dmi...@zend.com> wrote: > > Hi Rasmus, > > > > I'm glad the patch is not a big problem for APC. > > BTW: I decided not to commit the patch as is, and implement the similar > > optimization for CVs first. > > Otherwise I may need to change the way TMP_VAR accessed twice. > > I'll probably send the patch for review later today. > > > > Thanks. Dmitry. > > > > On Fri, Nov 30, 2012 at 11:48 PM, Rasmus Lerdorf <ras...@lerdorf.com>wrote: > >> On 11/30/2012 09:15 AM, Dmitry Stogov wrote: > >> > Hi, > >> > > >> > The NEWS and UPGRADING explains the details. > >> > > >> > http://pastebin.com/VC71Y8LV > >> > > >> > The patch is big, but actually quite simple. > >> > I'm going to commit it on Monday or Tuesday (if no objections). > >> > > >> > I'm going to look into the similar optimization for CVs, but it's > >> > going > >> > >> to > >> > >> > be a bit more difficult. > >> > >> Looks good to me. I'll commit this change to APC when you commit it: > >> > >> Index: apc_zend.c > >> =================================================================== > >> --- apc_zend.c (revision 328577) > >> +++ apc_zend.c (working copy) > >> @@ -48,7 +48,11 @@ > >> > >> static opcode_handler_t *apc_original_opcode_handlers; > >> static opcode_handler_t apc_opcode_handlers[APC_OPCODE_HANDLER_COUNT]; > >> > >> +#if PHP_MAJOR_VERSION >= 6 || PHP_MAJOR_VERSION == 5 && > >> PHP_MINOR_VERSION >= 5 > >> +#define APC_EX_T(offset) (*EX_TMP_VAR(execute_data, > >> offset)) > >> +#else > >> > >> #define APC_EX_T(offset) (*(temp_variable > >> > >> *)((char*)execute_data->Ts + offset)) > >> +#endif > >> > >> And there are a couple of extensions that are going to need similar > >> changes because of this. pecl/optimizer, pecl/inclued, pecl/xhprof, > >> pecl/operator and xdebug from a quick check. > >> > >> -Rasmus -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
