#45942 [Opn->Csd]: D_FILE_OFFSET_BITS=64 causes PHP to run at half speed
ID: 45942
User updated by: jhuckaby at gmail dot com
Reported By: jhuckaby at gmail dot com
-Status: Open
+Status: Closed
Bug Type: Performance problem
Operating System: Fedora Core 6
PHP Version: 5.2.6
New Comment:
This can be solved by using AC_SYS_LARGEFILE and a more modern
operating
system (tested with Mac OS X 10.5 and Fedora 9). Apparently Fedora
Core
6 is too old to support the flag. I am closing this bug.
Previous Comments:
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[2008-08-29 21:30:35] jhuckaby at gmail dot com
I should have also noted, this same error happens with 5.2.4 stable,
5.2.6 stable, and the CVS daily snapshot build for Aug 29, 2008.
------------------------------------------------------------------------
[2008-08-29 21:27:01] jhuckaby at gmail dot com
Wait, I spoke too soon! Please don't close the bug yet. As soon as I
removed the "--disable-all --disable-cgi" ./configure command-line
options, I got this build error from the "make" step:
/home/jhuckaby/dev/3rdparty/source/apache-1.3/php-
5.2.7/ext/posix/posix.c: In function 'zif_posix_uname':
/home/jhuckaby/dev/3rdparty/source/apache-1.3/php-
5.2.7/ext/posix/posix.c:471: error: 'struct utsname' has no member
named 'domainname'
make: *** [ext/posix/posix.lo] Error 1
I didn't add any new command-line options, I simply removed the "--
disable-all --disable-cgi".
./configure --with-apache=../apache_1.3.39 --prefix=/ipix/php --with-
config-file-path=/ipix/php/lib --disable-all --disable-cgi
Any ideas?
Should I file this under a separate bug?
------------------------------------------------------------------------
[2008-08-29 20:28:04] jhuckaby at gmail dot com
Okay, I followed your instructions. I added AC_SYS_LARGEFILE to
configure.in, then ran ./buildconf --force. Then I followed with
./configure..., make, and make install. I found the following output
from ./configure of interest:
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... unknown
checking for _LARGE_FILES value needed for large files... unknown
Anyway, it compiled clean and installed. And it seems to work
correctly, writing >2GB large files without error AND the interpreter
speed is fast! Thanks!
[root@dev-ops php-5.2.6]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 310
[root@dev-ops php-5.2.6]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 311
[root@dev-ops php-5.2.6]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 312
[root@dev-ops php-5.2.6]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 306
[root@dev-ops php-5.2.6]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 311
I guess we can close this bug!
------------------------------------------------------------------------
[2008-08-29 19:03:20] crrodriguez at suse dot de
You dont pass D_FILE_OFFSET_BITS=64 directly, but add
AC_SYS_LARGEFILE
to configure.in then run ./buildconf --force and rebuild PHP.
BTW.. it is known that large file support may not work currenlty with
PHP.
------------------------------------------------------------------------
[2008-08-28 21:20:42] jhuckaby at gmail dot com
Good idea.
CFLAGS="-D_FILE_OFFSET_BITS=64" ./configure --disable-all --disable-
cgi --with-apache=../apache_1.3.39 --prefix=/ipix/php --with-config-
file-path=/ipix/php/lib
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 157
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 157
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 156
./configure --disable-all --disable-cgi --with-apache=../apache_1.3.39
--prefix=/ipix/php --with-config-file-path=/ipix/php/lib
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 285
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 293
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 289
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 298
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 287
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 293
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 286
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 289
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 298
[root@dev-ops buildscripts]# /ipix/php/bin/php ~/benchmark.php
CPU Benchmark: 285
Still almost twice as fast when I remove the D_FILE_OFFSET_BITS flag.
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