01-13-2009
Apache 2.2 on Ubuntu 8.10
Hello,
Does anyone know or know how to check if the Apache 2.2 version you can get with the Synaptic Package manager in Ubuntu 8.10has been optimized for 486 or higher processors?
I would think one would have to optimize the executable for 486 or higher processer baed on the Apache optimization guide below. I am a little new to Apache so I do not know if I have to do what they say below since I run on a processor greater than a 496(it is a little confuzing). Any advice?
Atomic Operations
Some modules, such as mod_cache and recent development builds of the worker MPM, use APR's atomic API. This API provides atomic operations that can be used for lightweight thread synchronization.
By default, APR implements these operations using the most efficient mechanism available on each target OS/CPU platform. Many modern CPUs, for example, have an instruction that does an atomic compare-and-swap (CAS) operation in hardware. On some platforms, however, APR defaults to a slower, mutex-based implementation of the atomic API in order to ensure compatibility with older CPU models that lack such instructions. If you are building Apache for one of these platforms, and you plan to run only on newer CPUs, you can select a faster atomic implementation at build time by configuring Apache with the --enable-nonportable-atomics option:
./buildconf
./configure --with-mpm=worker --enable-nonportable-atomics=yes
The --enable-nonportable-atomics option is relevant for the following platforms:
* Solaris on SPARC
By default, APR uses mutex-based atomics on Solaris/SPARC. If you configure with --enable-nonportable-atomics, however, APR generates code that uses a SPARC v8plus opcode for fast hardware compare-and-swap. If you configure Apache with this option, the atomic operations will be more efficient (allowing for lower CPU utilization and higher concurrency), but the resulting executable will run only on UltraSPARC chips.
* Linux on x86
By default, APR uses mutex-based atomics on Linux. If you configure with --enable-nonportable-atomics, however, APR generates code that uses a 486 opcode for fast hardware compare-and-swap. This will result in more efficient atomic operations, but the resulting executable will run only on 486 and later chips (and not on 386).
6 More Discussions You Might Find Interesting
1. Ubuntu
I have install Ubuntu Intrepid and Zoneminder 1.23X. I have setup all of the all of the cameras and every time I try and run the cameras is cycle or montage mode I get no picture and I see a little emblem that resembles a broken connection. I checked /var/log/apache2/error.log and I can see that... (1 Reply)
Discussion started by: metallica1973
1 Replies
2. UNIX for Dummies Questions & Answers
My intention was to build a dual boot XP Pro 64 and Ubuntu media server. I had installed the AMD64 version of Ubuntu 8.10 server and thought that I would be able to install Apache server. I need a GUI to work in. I tried to boot and install Mythbuntu 32 bit 8.10, but my machine now won't recognize... (0 Replies)
Discussion started by: docflyboy
0 Replies
3. Ubuntu
I am using Ubuntu 9.10 with Gnome 2.28.
I use the default Nautilus File Manager to view / manage files.
Is there a way to add icons or customize the icons that are above the location bar and below the menus? There is a bar that has icons for "Back" "Forward" "Parent" above the location bar. I... (6 Replies)
Discussion started by: drewk
6 Replies
4. Ubuntu
Gurus,
I want log in locally to my Lucid (10.04) workstation and have my code saved over the network on my samba account
At work, all developers have samba user ids and when we were running Red Hat, we went thru the following procedure to get setup.
* open a shell session to NFS server... (2 Replies)
Discussion started by: alan
2 Replies
5. Web Development
Hi,
I'm new to developing modules for Apache. I understand the basics now and can develop something simple which allows a 'GET' request to happen, but what I want to do is actually 'POST' information to my site. I know the basic POST Request works and I can see that it is post by looking at... (2 Replies)
Discussion started by: fishman2001
2 Replies
6. Ubuntu
I need to re-install ubuntu on a system with ubuntu 14.04 already installed. I have the cd but can not seem to boot from it or find the installer. Is there a way to re-install from the command line or how do I do a fresh re-install? Thank you :)
---------- Post updated at 10:13 AM... (2 Replies)
Discussion started by: cmccabe
2 Replies
LEARN ABOUT DEBIAN
apr::bucketalloc
libapache2-mod-perl2-2.0.7::docs::api::APR::BucketAlloc(User Contributed Perl Documentlibapache2-mod-perl2-2.0.7::docs::api::APR::BucketAlloc(3pm)
NAME
APR::BucketAlloc - Perl API for Bucket Allocation
Synopsis
use APR::BucketAlloc ();
$ba = APR::BucketAlloc->new($pool);
$ba->destroy;
Description
"APR::BucketAlloc" is used for bucket allocation.
"new"
Create an "APR::BucketAlloc" object:
$ba = APR::BucketAlloc->new($pool);
class: "APR::BucketAlloc"
arg1: $pool ( "APR::Pool object" )
The pool used to create this object.
ret: $ba ( "APR::BucketAlloc object" )
The new object.
since: 2.0.00
This bucket allocation list (freelist) is used to create new buckets (via "APR::Bucket->new") and bucket brigades (via
"APR::Brigade->new").
You only need to use this method if you aren't running under httpd. If you are running under mod_perl, you already have a bucket
allocation available via "$c->bucket_alloc" and "$bb->bucket_alloc".
Example:
use APR::BucketAlloc ();
use APR::Pool ();
my $ba = APR::BucketAlloc->(APR::Pool->pool);
my $eos_b = APR::Bucket::eos_create($ba);
"destroy"
Destroy an "APR::BucketAlloc object":
$ba->destroy;
arg1: $ba ( "APR::BucketAlloc object" )
The freelist to destroy.
ret: no return value
since: 2.0.00
Once destroyed this object may not be used again.
You need to destroy $ba only if you have created it via "APR::BucketAlloc->new". If you try to destroy an allocation not created by this
method, you will get a segmentation fault.
Moreover normally it is not necessary to destroy allocators, since the pool which created them will destroy them during that pool's cleanup
phase.
See Also
mod_perl 2.0 documentation.
Copyright
mod_perl 2.0 and its core modules are copyrighted under The Apache Software License, Version 2.0.
Authors
The mod_perl development team and numerous contributors.
perl v5.14.2 2011-02-08 libapache2-mod-perl2-2.0.7::docs::api::APR::BucketAlloc(3pm)