Bug 164558

Summary:	ebuild for net-www/apache-2.0.58-r2 lack very important configuration options
Product:	Gentoo Linux	Reporter:	MT <toffanin.mauro>
Component:	New packages	Assignee:	Apache Team - Bugzilla Reports <apache-bugs>
Status:	RESOLVED WONTFIX
Severity:	enhancement	CC:	sergio.bevilacqua
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	apache-2.0.58.patch BerkeleyDB-0.31.ebuild.patch

Description MT 2007-01-30 15:48:20 UTC

the apache ebuild is missing of two important options:

1- use of APR hardaware atomic operations: --enable-nonportable-atomics=yes
2- missing of the CFLAG: -DDYNAMIC_MODULE_LIMIT=0 during compilation of the static modules

the first option is very critical, because by default, apache compile itself with the compatible APR ABI, which provice only "software atomic operations", losing all the advantages that come from modern CPU(s) with "hardware atomic operations".

"APR hardware atomic operations" are very important on high-traffic webservers, because they do the difference: lower CPU utilization and higher concurrency. Actualy gentoo apache do not scale very well on very load webservers, the attached patch correct the problem.

the second option it's not critical, but can save some RAM usage when people are using static modules.

ATTENTION: i have tested the patch only on x86 machines and work very well, but i do not have SPARC/PPC machines, so before to apply the patch to the stable branch, do an appropriate testing. SPARC/PPC will have a great performance improvements with atomic hardware operations.

some useful reference: http://httpd.apache.org/docs/2.0/misc/perf-tuning.html

Reproducible: Always

Steps to Reproduce:

Comment 1 MT 2007-01-30 15:49:48 UTC

Created attachment 108627 [details, diff]
apache-2.0.58.patch

Comment 2 MT 2007-06-16 15:30:56 UTC

Created attachment 122239 [details, diff]
BerkeleyDB-0.31.ebuild.patch

a more cleaned patch as required by Flameeyes (thank you for the support).

Comment 3 MT 2007-06-16 15:36:44 UTC

please ignore my last msg.
sorry for the noise.

Comment 4 Benedikt Böhm (RETIRED) gentoo-dev

2007-07-30 18:23:29 UTC

apr-1.2.8 uses nonportable atomics by default if available on the target architecture.

i don't think -DDYNAMIC_MODULE_LIMIT=0 is a good idea because you should still be able to link external modules into apach at run-time even if all upstream modules have been linked statically...