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Gentoo Performance Problems

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Yev
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Gentoo Performance Problems

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Post by Yev » Tue Aug 09, 2005 8:49 pm

Hi,

I've had Gentoo for about 8 months now, since the day i installed 2004.3 release i've had some "minor" performance problems.
Since then i've upgraded to 2005.0 with KDE 3.4.1. I installed Shorewall for some protection :lol:.

I have a 2.4GHz Pentium-4, 256 DDR with gForce-4 MX 440, kernel 2.6.12-r6

Untill lately i was too busy with migrating from windows to Linux so I ignored the performance issue. But now i'm using Gentoo most of the time and this is bugging me.
I thought that the problem might be coming from bad disk performance, i ran #hdparm -tT /dev/hdX on both of my HDs and indeed i found that UDMA wasnt working and i had poor disk speed. I then recompiled my kernel to support the IDE controller and the disk performance jumped from 10 MB/Sec to 40 MB/Sec.

As this seems to be a great improvement i'm still having CPU load issues. I have superkaramba installed which shows me 100% CPU load when i start programs or do some semi-heavy activities. By comparing superkaramba's results to #top results i found that superkarmaba is a chronic liar. But that didnt change the fact that i feel bad performance. I hate saying this but my windows xp gets better performance on the same machine than Gentoo. This must be changed! :evil:

Can anyone guide(or point :arrow: me to a guide, just not "Flying with Gentoo" - been there) on things to check that i might have configured wrong?

P.S: dmesg is flooded by Shorewall and i dont know how to stop it. I would like some help on that too please.


Thanks...
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hardcore
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Post by hardcore » Tue Aug 09, 2005 9:13 pm

How do you define your 'bad performance' ?

Do you have DMA enabled on your hard disk? How much RAM do you have? What kernel are you running? What processor are you running on? ...etc

To give any help performance-wise, you'll need to define your 'bad performance' first, then list off any pertinent hardware, CPU, RAM, etc. An emerge info and kernel version would be helpful as well.
Nothing can stop me now, cuz I just don't care.
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Yev
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Post by Yev » Tue Aug 09, 2005 9:30 pm

As you can see in my first post i did specify CPU, RAM and kernel version.
To answer your question, yes, i am using DMA.

By bad performance i mean that when i start Thunderbird it takes about 10 sec to open it and meanwhile everything gets slow, if I move the mouse around i can see it's moving slowly.
When i run emerge the same thing happens during the whole emerge process(except for when downloading).

I also installed aMule and while it's running the same thing happens, everything works slower. I thought that aMule might be buggy but a friend of mine is using the same version with a box which is almost as mine and it's running smoothly for him.
Another thing is when i run #emerge -s <something> it takes time before it even starts searching, but the second time i run it's going really fast.

Here is my make.conf: (a friend suggested i might have bad flags in there)
--------------------------------------------------------------------------------------
# These settings were set by the catalyst build script that automatically built this stage
# Please consult /etc/make.conf.example for a more detailed example
CFLAGS="-O2 -march=pentium4 -pipe"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j2"
GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="-gtk -gnome -ipv6 gstreamer qt kde aac acl alsa oss avi cdr divx4linux doc dvd dvdread examples icq javascript msn opengl samba unicode usb vcd videos xvid nvidia ldap"
ALSA_CARDS="via82xx"
LINGUAS="he"

Here is the emerge info:
----------------------------
Portage 2.0.51.22-r2 (default-linux/x86/2005.0, gcc-3.3.5, glibc-2.3.5-r0, 2.6.12-gentoo-r6 i686)
=================================================================
System uname: 2.6.12-gentoo-r6 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz
Gentoo Base System version 1.6.13
ccache version 2.3 [disabled]
dev-lang/python: 2.3.5
sys-apps/sandbox: 1.2.11
sys-devel/autoconf: 2.13, 2.59-r6
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5
sys-devel/binutils: 2.15.92.0.2-r10
sys-devel/libtool: 1.5.18-r1
virtual/os-headers: 2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium4 -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/bind /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=pentium4 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/"
LANG="en_US.UTF-8"
LINGUAS="he"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="x86 X aac acl alsa apm arts avi berkdb bitmap-fonts cdr crypt cups curl divx4linux doc dvd dvdread eds emboss encode examples fam foomaticdb fortran gd gdbm gif gpm gstreamer gtk2 icq imagemagick imlib javascript jpeg kde ldap libg++ libwww mad mikmod motif mp3 mpeg msn ncurses nls nvidia ogg oggvorbis opengl oss pam pdflib perl png python qt quicktime readline samba sdl spell ssl tcpd tiff truetype truetype-fonts type1-fonts unicode usb vcd videos vorbis xine xml2 xmms xv xvid zlib linguas_he userland_GNU kernel_linux elibc_glibc"
Unset: ASFLAGS, CTARGET, LC_ALL, LDFLAGS, PORTDIR_OVERLAY


Hope this is enough...
Last edited by Yev on Tue Aug 09, 2005 9:30 pm, edited 1 time in total.
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Naib
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Post by Naib » Tue Aug 09, 2005 9:30 pm

two things could be causing your perfomance hit

1) shorewall flooding your log files and slowing down system due to excessive disk activity.
I had a similar problem when using FireHOL for configuring my firewall, my logful just got "flooded" and all that access slowed things down.

I do not know "Shorewall" but I sure there must be a setting to reduce the frequecy of log-entries

A way to test IF that is a problem, stop shorewall (via as root: /etc/init/shorewall stop I am only guessing the script is called "shorewall btw)

2) badly configured kernel .
YOu missed something when setting up your kernel and thus it is struggling to perform
#define HelloWorld int
#define Int main()
#define Return printf
#define Print return
#include <stdio>
HelloWorld Int {
Return("Hello, world!\n");
Print 0;
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Yev
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Post by Yev » Tue Aug 09, 2005 9:37 pm

I'm pretty sure that my make.conf file is not optimal.
About the kernel being misconfigured, it might be, but i wouldnt know what to look for. :(

Anyway, i tried stopping shorewall and it did seem to be a bit faster, but the problem was even before i emerged Shorewall.
Still i need to make it stop flooding dmesg.

...
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Post by Naib » Tue Aug 09, 2005 9:46 pm

your make.conf file looks fine.
This is mine

Code: Select all

# These settings were set by the catalyst build script that automatically built this stage
# Please consult /etc/make.conf.example for a more detailed example


CFLAGS="-O3 -march=pentium4 -fforce-addr -pipe -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="${CFLAGS} -fvisibility-inlines-hidden"
ACCEPT_KEYWORDS="x86"
MAKEOPTS="-j2"


USE="
acpi aim alsa apm -arts avi
bitmap-fonts bluetooth bonobo bzip2
cdr cups  -curl
directfb dvd dvdread
eds extensions
fbcon flac
geoip gif gimpprint gnome gphoto2 gstreamer gtk gtk2 gtkhtml
hal
inkjar
-java joystick jpg
-kde kqemu
ldap
mono mozilla mmx mmx2 mme mme2 mp3 mpeg msn
nls nntp nomotif nptl nptlonly nvidia
pdflib plugin png ppds python
-qt
real
softmmu sse sse2
truetype
unicode usb
vim-with-x
win32codecs
X xml xml2 -xmms xprint xinerama
zlib"


GENTOO_MIRRORS="ftp://mirrors.blueyonder.co.uk/sites/gentoo
ftp://ftp.join.uni-muenster.de/pub/linux/distributions/gentoo
ftp://ftp.wh2.tu-dresden.de/pub/mirrors/gentoo http://mirror.switch.ch/mirror/gentoo/ ftp://mirror.switch.ch/mirror/gentoo/ ftp://ftp.solnet.ch/mirror/Gentoo http://www.mirror.ac.uk/mirror/www.ibiblio.org/"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
RSYNC_RETRIES="3"
RSYNC_TIMEOUT="30"
PORTAGE_NICENESS=3
AUTOCLEAN="yes"


FEATURES="ccashe distlocks sandbox userpriv usersandbox"
CCACHE_SIZE="2G"
RSYNC_EXCLUDEFROM=/etc/portage/rsync_excludes

LINGUAS="en_GB"
LANGUAGE="44"

PORTAGE_TMPDIR=/var/tmp
PORTDIR=/usr/portage
DISTDIR=${PORTDIR}/distfiles
PKGDIR=${PORTDIR}/packages
PORT_LOGDIR=/var/log/portage
PORTDIR_OVERLAY=/usr/local/portage
PORTAGE_TMPFS="/dev/shm"

As to the kernel config thing: if it is mis-configured, easy enough done, lost count how many times I have done it, seem to always happen at a major kernel upgrade I have to re-compile twice.

All I can say is go through everything, every sub-tree and read all the options available. Yes it is tedious but it is the only way to see if you missed sometthing (sa y apiece of hardware or an optimum setting). Only you will be able to stop it. it not to daughting so dont worry.


And yes deff sort out the flooding by shorewall, read some of the config options and look for anything to do to logging (like log-frequency)
#define HelloWorld int
#define Int main()
#define Return printf
#define Print return
#include <stdio>
HelloWorld Int {
Return("Hello, world!\n");
Print 0;
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hardcore
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Post by hardcore » Wed Aug 10, 2005 6:54 am

Yev wrote:As you can see in my first post i did specify CPU, RAM and kernel version.
To answer your question, yes, i am using DMA.

By bad performance i mean that when i start Thunderbird it takes about 10 sec to open it and meanwhile everything gets slow, if I move the mouse around i can see it's moving slowly.
When i run emerge the same thing happens during the whole emerge process(except for when downloading).

I also installed aMule and while it's running the same thing happens, everything works slower. I thought that aMule might be buggy but a friend of mine is using the same version with a box which is almost as mine and it's running smoothly for him.
Another thing is when i run #emerge -s <something> it takes time before it even starts searching, but the second time i run it's going really fast.

Here is my make.conf: (a friend suggested i might have bad flags in there)
--------------------------------------------------------------------------------------
# These settings were set by the catalyst build script that automatically built this stage
# Please consult /etc/make.conf.example for a more detailed example
CFLAGS="-O2 -march=pentium4 -pipe"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j2"
GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="-gtk -gnome -ipv6 gstreamer qt kde aac acl alsa oss avi cdr divx4linux doc dvd dvdread examples icq javascript msn opengl samba unicode usb vcd videos xvid nvidia ldap"
ALSA_CARDS="via82xx"
LINGUAS="he"

Here is the emerge info:
----------------------------
Portage 2.0.51.22-r2 (default-linux/x86/2005.0, gcc-3.3.5, glibc-2.3.5-r0, 2.6.12-gentoo-r6 i686)
=================================================================
System uname: 2.6.12-gentoo-r6 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz
Gentoo Base System version 1.6.13
ccache version 2.3 [disabled]
dev-lang/python: 2.3.5
sys-apps/sandbox: 1.2.11
sys-devel/autoconf: 2.13, 2.59-r6
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5
sys-devel/binutils: 2.15.92.0.2-r10
sys-devel/libtool: 1.5.18-r1
virtual/os-headers: 2.6.11-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium4 -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/bind /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=pentium4 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/"
LANG="en_US.UTF-8"
LINGUAS="he"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="x86 X aac acl alsa apm arts avi berkdb bitmap-fonts cdr crypt cups curl divx4linux doc dvd dvdread eds emboss encode examples fam foomaticdb fortran gd gdbm gif gpm gstreamer gtk2 icq imagemagick imlib javascript jpeg kde ldap libg++ libwww mad mikmod motif mp3 mpeg msn ncurses nls nvidia ogg oggvorbis opengl oss pam pdflib perl png python qt quicktime readline samba sdl spell ssl tcpd tiff truetype truetype-fonts type1-fonts unicode usb vcd videos vorbis xine xml2 xmms xv xvid zlib linguas_he userland_GNU kernel_linux elibc_glibc"
Unset: ASFLAGS, CTARGET, LC_ALL, LDFLAGS, PORTDIR_OVERLAY


Hope this is enough...
:oops: whoops, sorry I overlooked that! Anyways, you might want to give the ck kernel a shot, it's aimed at desktop responsiveness.
Nothing can stop me now, cuz I just don't care.
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Yev
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Post by Yev » Wed Aug 10, 2005 7:28 am

Thanks for the help guys, i'll go through the kernel settings as soon as i get home and post any results.
:wink:
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Post by Yev » Fri Aug 12, 2005 4:16 pm

Well, i've checked the whole kernel configuration and found nothing that, in my opinion, can slow the system down.

Since i enabled kernel support for my IDE and enabled UDMA and rebooted a couple of times, things seem to be moving faster. I guess i'll have to accept the performance i have.

Thanks for all the help guys!
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Post by virtual » Fri Aug 12, 2005 11:01 pm

Hi,

have you compared your /etc/conf.d/hostname with your /etc/hosts file and made sure that your ip-adr and hostname in /etc/hosts match with the hostname in /etc/conf.d/hostname. Also if you are not using ipv6 that you have it removed from the kernel as I see you have removed it from your useflags "-ipv6" and the file /etc/env.d/99kde-env does it include the line: KDE_NO_IPV6=1.

Have you tried to prelink your system, are you using the nvidia driver or the nv driver

I would not give up if my performance (generaly speaking) was lower than Win XP.

Also check your memory usage use the kde program kinfocenter and click on memory, if you constantly have a huge swapfile usage maybe you need to add memory. BTW having alot of free memory is not a good sign nor bad.

Looking at your make.conf I notice in your CFLAGS line that you lack -fomit-frame-pointer and this is a quite a standard optimization. I would change it to look like the line below, then recompile everything with emerge -e world (do the emerge just before you go to bed)
CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer"
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Post by Yev » Sat Aug 13, 2005 12:03 pm

Hi,

Thanks for the reply.

I checked my /etc/hosts file against /etc/conf.d/hostname and found that in /etc/hosts i have only

Code: Select all

127.0.0.1 localhost
and in /etc/conf.d/hostname i have

Code: Select all

HOSTNAME="my-box"
so i added the line

Code: Select all

127.0.0.1 my-box
to the /etc/hosts file.

Checked the /etc/env.d/99kde-env file and added KDE_NO_IPV6=1 to it as you suggested.
I thought of prelinking before but decided to leave it for later when i have time and disk space for it.
Also i checked the kernel config and have no support for IPV6 in my kernel.
And about recompiling everything. Well, that's just scary. I'll do it after i run a backup.
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Post by ninjaboy13 » Sun Aug 14, 2005 7:18 pm

What nic are you using and what driver? I was having a performance issue a while back that was being caused by the kernel drivers for my nic. If I had gkrellm running my mouse would move really slow. Anyway the solution was to switch the driver I was using for my Marvel gigabit nic in my kernel. Search the forum for more info and try posting your lspci output.

PS-I thought the hosts file entry should look like 127.0.0.1 localhost pcname.domain but I could be wrong. Although I don't think this has anything to do with your problem.
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Post by Yev » Mon Aug 15, 2005 5:44 pm

The drivers i use for both NICs are fine. I'm sure of that.
Yev
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Post by vladky » Tue Aug 16, 2005 5:38 pm

Naib wrote:your make.conf file looks fine.
This is mine

Code: Select all

...
FEATURES="ccashe ...
...
Hi :),
did you mean ccache :?:
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Post by jonaswidarsson » Fri Aug 19, 2005 4:58 pm

I'd try dropping the -march to pentium3 or i686.
I had the exact same problem.
I ranted a lot about bad multitasking at the time...

This was some time ago (GCC 3.2 around february 2004) so it might be otherwise nowadays. My CFLAGS today are:
CFLAGS="-O3 -march=i686 -pipe "

But wait 'til others comment on this, because a lot should have happened since I had problems with the -march=pentium4 flag ;).

(You do realise following my advice would mean recompiling everything... So wait until others speak up first.)

BTW, I never had any problems with -O3. Some packages doesn't support it and lower this to -O2 by themselves I think. I'd say, go -O3.

EDIT:
My system is a 2,6GHz p4 with 1 GB RAM@333MHz
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Post by vipernicus » Fri Aug 19, 2005 9:25 pm

Try this for /etc/hosts

Code: Select all

127.0.0.1 localhost my-box
and also, for prelinking, you need USE="pic". try out ck-sources. try USE="nptl". research LDFLAGS.
Viper-Sources Maintainer || nesl247 Projects || vipernicus.org blog
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Post by Taladar » Fri Aug 19, 2005 10:35 pm

As to the kernel config thing: if it is mis-configured, easy enough done, lost count how many times I have done it, seem to always happen at a major kernel upgrade I have to re-compile twice.

All I can say is go through everything, every sub-tree and read all the options available. Yes it is tedious but it is the only way to see if you missed sometthing (sa y apiece of hardware or an optimum setting). Only you will be able to stop it. it not to daughting so dont worry.
You might want to use "make oldconfig". That way you can only forget making changes due to new or removed settings. Just copy the .config from your old kernel to the new kernel source dir before running it.
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Post by neo86 » Fri Aug 19, 2005 11:19 pm

I've been using Gentoo for a few months now as well. If you're like me I don't think you're seeing anything really odd performance wise. This is Linux. There isn't much more optimization you can do that'll autmagically make it Windows fast. I'd suggest using ck-sources and enable prelinking as already suggested by some to make it a bit faster. No, this isn't intended as a troll.:lol:
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Post by dementer » Sat Aug 20, 2005 12:10 am

just comming back to the DMA thing for your hard disk, UDMA relates to the transfer of data, DMA relates to scheduling of those transfers, and is not the same. do you have BOTH enabled? Read man hdparm for more info. Running

Code: Select all

hdparm -iI /dev/<your disk>
will tell you a lot.

Also check the scheduler you are using in your kernel, gentoo-sources has three, (AS, DEADLINE, CFQ) try them all out (CFQ is pretty good for a desktop). If you compile them all into the kernel at once, only the first one the kernel finds will ever be used unless you pass an option through on the command line. Also make sure you have preemtible kernel enabled. Other specialised kernels (such as -ck) will have different options

in make menuconfig
schedulers are under 'Device Drivers-->Block Devices-->IO schedulers'
preemtible is under 'Processor Types & Features'

I also have the big lock option enabled and have had no trouble.
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