Tonight I wanted to do some benchmarks with PHP 4.3.11, PHP 5.0.4, and
the three (CALL, GOTO, SWITCH) executors of PHP 5.1 with both GCC 3.4.4
and GCC 4.0.1 to get a feeling for the improvements in the VM for
PHP 5.1.
Both the CALL and SWITCH executors segfault for me on my Linux system
when running the ZendEngine2/bench.php script.
Below is the backtrace for the GOTO executor:
(gdb) r Zend/bench.php
Starting program: /usr/local/src/php/php-5.1/sapi/cli/php Zend/bench.php
simple 0.294
simplecall 0.778
simpleucall 1.147
simpleudcall 1.379
mandel 1.223
mandel2 1.494
Program received signal SIGSEGV, Segmentation fault.
execute (op_array=0x826ffe0) at zend_vm_execute.h:3834
3834 memset(EX(CVs), 0, sizeof(zval**) * op_array->last_var);
(gdb) bt
#0 execute (op_array=0x826ffe0) at zend_vm_execute.h:3834
#1 0x0816d534 in execute (op_array=0x812dcc0) at zend_vm_execute.h:3989
.
.
.
#871 0x0816d534 in execute (op_array=0x8285194) at zend_vm_execute.h:3989
#872 0x0812fa34 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
at /usr/local/src/php/php-5.1/Zend/zend.c:1077
#873 0x080ecb4d in php_execute_script (primary_file=0xbffff7a0)
at /usr/local/src/php/php-5.1/main/main.c:1670
#874 0x081d3b4a in main (argc=2, argv=0xbffff874)
at /usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036
Below is the backtrace for the SWITCH executor:
(gdb) r Zend/bench.php
Starting program: /usr/local/src/php/php-5.1/sapi/cli/php Zend/bench.php
simple 0.316
simplecall 0.779
simpleucall 1.170
simpleudcall 1.389
mandel 1.384
mandel2 1.630
Program received signal SIGSEGV, Segmentation fault.
execute (op_array=0x8273fe0) at zend_vm_execute.h:53
53 memset(EX(CVs), 0, sizeof(zval**) * op_array->last_var);
(gdb) bt
#0 execute (op_array=0x8273fe0) at zend_vm_execute.h:53
#1 0x0816f7b8 in execute (op_array=0x812dcc0) at zend_vm_execute.h:211
.
.
.
#875 0x0816f7b8 in execute (op_array=0x8289194) at zend_vm_execute.h:211
#876 0x0812fa34 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
at /usr/local/src/php/php-5.1/Zend/zend.c:1077
#877 0x080ecb4d in php_execute_script (primary_file=0xbffff7a0) at
/usr/local/src/php/php-5.1/main/main.c:1670
#878 0x081d464a in main (argc=2, argv=0xbffff874) at
/usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036
--
Sebastian Bergmann http://www.sebastian-bergmann.de/
GnuPG Key: 0xB85B5D69 / 27A7 2B14 09E4 98CD 6277 0E5B 6867 C514 B85B 5D69
