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Graham Dumpleton
graham.dumpleton at gmail.com
Tue May 29 06:58:19 EDT 2007
What they have done wrong is that in: /usr/lib64/python2.4/config they should have a symlink to the libpython2.4.so in /usr/lib64. On Ubuntu they have this link and it compiles fine. Graham On 29/05/07, ÕÅ³É <czhang.web at gmail.com> wrote: > > On 2007-5-28, at ÏÂÎç6:03, Graham Dumpleton wrote: > > > On 28/05/07, ÕÅ³É <czhang.web at gmail.com> wrote: > >> Graham or other mod_python gurus on the m-list: > >> > >> I tried to verify our mod_python compilation/installation is indeed > >> correct after I read the comment <http://www.davidcramer.net/curse/ > >> 44/ > >> what-powers-curse.html#comment-9271>, especially this part: > >> [quote] > >> As a reference point for discussion a correctly compiled Python/ > >> mod_python should only result in an Apache mod_python.so loadable > >> module of at most about 400 kilobytes. > >> [/quote] > >> > >> Unfortunately, ours mod_python.so is 1.3M in size: > >> # ls -lh /usr/lib64/apache2/modules/mod_python.so > >> -rwxr-xr-x 1 root root 1.3M 2007-04-26 08:42 /usr/lib64/apache2/ > >> modules/mod_python.so > >> > >> Since our Linux box is running Gentoo 2006.1, we do have the shared > >> library for Python: > >> # ls -l /usr/lib/libpython2.4.so > >> lrwxrwxrwx 1 root root 19 2007-05-28 17:24 /usr/lib/libpython2.4.so - > >> > libpython2.4.so.1.0 > >> # ls -l /usr/lib/libpython2.4.so.1.0 > >> -r-xr-xr-x 1 root root 1073360 2007-05-28 17:24 /usr/lib/ > >> libpython2.4.so.1.0 > > > > What Python libraries are in: > > > > /usr/lib64/python2.4/config > > > > and: > > > > /usr/lib64 > > > > Ie., the 64 bit lib directories. > > > > It is going to look in the 'config' directory location above first and > > if there is only a static library there are not a shared library, it > > will probably use the static library. This is because the link line > > for library building according to your logs is: > > > > -L/usr/lib64/python2.4/config > > > > Graham > > # ls /usr/lib64/python2.4/config > config.c install-sh Makefile makesetup > Setup Setup.local > config.c.in libpython2.4.a Makefile.pre.in python.o Setup.config > > Indeed there is only a static library. > > # ls -ld /usr/lib > lrwxrwxrwx 1 root root 5 2006-04-03 16:20 /usr/lib -> lib64 > > The memory usage of mod_python with the static linked Python on our > box is (via top): > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 12243 aiyo 1 0 114m 51m 4428 S 0.0 2.0 22:05.23 /usr/ > sbin/apache2 -f /home/aiyo/apach > 12605 aiyo 1 0 106m 47m 3536 S 6.0 1.9 17:47.74 /usr/ > sbin/apache2 -f /home/aiyo/apach > 13192 aiyo 1 0 102m 44m 3536 S 5.0 1.8 7:38.23 /usr/ > sbin/apache2 -f /home/aiyo/apach > 12949 aiyo 1 0 103m 44m 3540 S 0.0 1.8 11:32.30 /usr/ > sbin/apache2 -f /home/aiyo/apach > 13297 aiyo 1 0 101m 43m 3536 S 0.0 1.7 5:12.81 /usr/ > sbin/apache2 -f /home/aiyo/apach > 27974 aiyo 31 0 96200 11m 6188 S 0.0 0.4 0:01.95 /usr/ > sbin/apache2 -f /home/aiyo/php/h > 28606 aiyo 1 0 95212 10m 6064 S 0.0 0.4 0:01.58 /usr/ > sbin/apache2 -f /home/aiyo/php/h > 28604 aiyo 1 0 95224 10m 5964 S 0.0 0.4 0:01.89 /usr/ > sbin/apache2 -f /home/aiyo/php/h > 12128 aiyo 1 0 95192 9856 5504 S 0.0 0.4 0:00.41 /usr/ > sbin/apache2 -f /home/aiyo/php/h > 27972 aiyo 17 0 93004 8264 4992 S 0.0 0.3 0:00.17 /usr/ > sbin/apache2 -f /home/aiyo/php/h > > The first five apache process is an apache instance running > mod_python, the next five apache process is another apache instance > running mod_php5. > > I just found out there is a program called 'python-config', whose > output is: > # python-config > -lpython2.4 -lm -L/usr/lib64/python2.4/config > > Seems to me that this is where the link parameters for Python come > from, but don't know how to adjust it to have '-L/usr/lib64'. > > I decided to supply the environment variable LDFLAGS="-L/usr/lib64" > while compiling mod_python, that results in such link command: > /usr/share/apr-0/build/libtool --silent --mode=link x86_64-pc-linux- > gnu-gcc -o mod_python.la -rpath /usr/lib64/apache2/modules -module - > avoid-version finfoobject.lo hlistobject.lo hlist.lo > filterobject.lo connobject.lo serverobject.lo util.lo tableobject.lo > requestobject.lo _apachemodule.lo mod_python.lo -L/usr/lib64 -L/usr/ > lib64/python2.4/config -Xlinker -export-dynamic -lm -lpython2.4 - > lpthread -ldl -lutil -lm > > # ldd src/.libs/mod_python.so > libpython2.4.so.1.0 => /usr/lib/libpython2.4.so.1.0 > (0x00002b359b034000) > libpthread.so.0 => /lib/libpthread.so.0 (0x00002b359b240000) > libdl.so.2 => /lib/libdl.so.2 (0x00002b359b35a000) > libutil.so.1 => /lib/libutil.so.1 (0x00002b359b45f000) > libm.so.6 => /lib/libm.so.6 (0x00002b359b562000) > libc.so.6 => /lib/libc.so.6 (0x00002b359b6b7000) > /lib64/ld-linux-x86-64.so.2 (0x0000555555554000) > > Now the memory usage of mod_python with the dynamic linked Python on > our box is (via top): > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 20754 aiyo 5 0 114m 46m 4460 S 0.0 1.9 12:16.48 /usr/ > sbin/apache2 -f /home/aiyo/apach > 22607 aiyo 1 0 105m 44m 3472 S 0.0 1.8 2:16.71 /usr/ > sbin/apache2 -f /home/aiyo/apach > 21664 aiyo 1 0 104m 44m 3916 S 0.0 1.8 8:18.80 /usr/ > sbin/apache2 -f /home/aiyo/apach > 22498 aiyo 1 0 103m 43m 3476 S 1.0 1.7 2:18.09 /usr/ > sbin/apache2 -f /home/aiyo/apach > 22681 aiyo 1 0 101m 42m 3472 S 0.0 1.7 1:11.02 /usr/ > sbin/apache2 -f /home/aiyo/apach > 22721 aiyo 1 0 99.5m 40m 3460 S 0.0 1.6 0:19.66 /usr/ > sbin/apache2 -f /home/aiyo/apach > > Looks like I do squeeze a few meg bytes out of each apache process > with your help. :-) > Thanks. > > BR, > - Cheng
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