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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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 Posted: Fri Feb 09, 2007 9:24 am Post subject: Gentoo on big Wall Display (10kpixels) - X problems |
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Hello you all,
I'm running Gentoo on a display wall. It contains 12 (4x3 - 30inches) screens (2560x1600px each), 6 hp9300 nodes (bi opterons dual cores, 16Gb RAM, with nvidia 4500) to pilot the screens, one other hp9300 to control the others.
Everything works with an infiniband network.
I'm using Xdmx to display a gnome on the wall with :
| Code: | [ebuild R ] x11-base/xorg-server-1.2.0 USE="dmx nptl sdl xorg (-3dfx) -debug -dri -ipv6 -kdrive -minimal -xprint" INPUT_DEVICES="evdev keyboard mouse -acecad -aiptek -calcomp -citron -digitaledge -dmc -dynapro -elo2300 -elographics -fpit -hyperpen -jamstudio -joystick -magellan -microtouch -mutouch -palmax -penmount -spaceorb -summa -synaptics -tek4957 -ur98 -vmmouse -void -wacom" VIDEO_CARDS="-apm -ark -chips -cirrus -cyrix -dummy -epson -fbdev -fglrx -glint -i128 (-i740) -i810 (-impact) (-imstt) -mach64 -mga -neomagic (-newport) (-nsc) -nv -nvidia -r128 -radeon -rendition -s3 -s3virge -savage -siliconmotion -sis -sisusb (-sunbw2) (-suncg14) (-suncg3) (-suncg6) (-sunffb) (-sunleo) (-suntcx) -tdfx -tga -trident -tseng -v4l -vesa -vga -via -vmware -voodoo" 9,092 kB
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Here are my USE flags :
| Code: | | USE="xorg -dri -ipv6 -ogg 3dnowext 64bit X a52 aac aalib alsa amd amd64 arts automount avi background bash-completion -bashlogger berkdb bitmap-fonts bl bzip2 cairo chroot cli crypt css cups dbus dga dhcp dlloader dmx dvdread dvi eds elibc_glibc emboss encode esd -ethereal exif fam ffmpeg firefox -flood font-server fortran ftp gdbm gif gkrellm gnome gpm gstreamer gtk gtk2 hal -hddtemp http imagemagick input_devices_evdev input_devices_keyboard input_devices_mouse isdnlog java jfs jpeg kde kernel_linux libg++ mad mikmod mp3 mpeg mpeg2 mmx mplayer ncurses nls nsplugin nptl nptlonly ogg opengl openssh openssl opensslcrypt oss pam pcre pda pdf pdflib perl png ppds pppd python qt3 qt4 quicktime readline reflection reiserfs samba sdl session sftp smp spell spl sse sse2 ssl tcpd tiff truetype truetype-fonts type1-fonts udev unicode userland_GNU vim vnc vorbis win32codecs x11vnc xfs xinerama xinetd xml xv zlib" |
Nota bene : I know, I need to erase some.
Here is my Xdmx script :
| Code: | #!/bin/bash
CONF=xdmx_wall.cfg
MY_HOME=/root/xdmx/
X_HOME=/usr/X11R6/
DMXINPUT=node01:0
Xdmx=${X_HOME}/bin/Xdmx
X=${X_HOME}/bin/X
${MY_HOME}/killX.sh
sleep 2
for i in `cat $MY_HOME/.nodes | awk '{ print $2 }'`
do
echo Connecting to [$i]
ssh root@$i "rm -rf /tmp/.X*" &
ssh root@$i "X -ac -c +bs" &
ssh root@$i "chmod 0666 /dev/nv*" &
done
sleep 5
exec $Xdmx :1 +xinerama -configfile ${MY_HOME}/${CONF} -fontpath "tcp/node08:7100" -depth 24 -param XkbLayout "fr" -input $DMXINPUT -ac -br +bs -norender 2>/dev/null &
export DISPLAY=:1
sleep 1
echo Starting manager &
exec gnome-session &
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With this configuration, I have some problems.
First, the refresh is slow. When I move a big window (something around 8000 pixel width), it's not very fluid.
Second, when I try to zoom or move a big (more than 15000 px width) picture in gimp, the refreshment is long. It's not a bandwidth problem (the infiniband bw is quite empty), but it seems to be more a XputImage and XgetImage problem (Xorg internal functions used to send images). I've found that using Xperf and gdb but I'm not a X core hacker, so, it's dificult to detect if it is those function which cause the problem. Maybe it's a gimp way to refresh, because the display is quickest with gkview for example. Does the e17 team works on those optimisations (with imlib2, ecore, .. ) ?
Third, glx doesn't works well. using glxgears, I can get 25 000fps on each node, but 500 fps using the display wall. I know that glxgears is not parallelised, but, 24000 fps it's an huge difference !! So, beryl doesn't works either (just thru the wall, it's ok on each node).
Fourth, every 3D (as openinventor, googleearth..) crash. I cannot understand why. It seems to work with only 3 nodes, but not on 6.
So, a lot of problems, but it's better and better each day.
If somebody have an idea, he's very welcome !
Thanx, and have a nice day,
Greg.
ps : scuse my english..
_________________
Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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Dan
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Joined: 25 Oct 2005
Posts: 1302
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| Posted: Fri Feb 09, 2007 3:57 pm Post subject: |
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Can you post these?
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Fri Feb 09, 2007 9:24 pm Post subject: |
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No problem, I post that back on monday.
Just a part of the answer, I'm using the last nvidia-drivers on each node.
Have a nice weekend !
Greg.
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Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Mon Feb 12, 2007 8:03 am Post subject: |
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Back in front of the wall, here is my "emerge --info" :
| Code: | Portage 2.1.2-r4 (default-linux/amd64/2006.1, gcc-4.1.1, glibc-2.5-r0, 2.6.19-gentoo-r4-kuriat x86_64)
=================================================================
System uname: 2.6.19-gentoo-r4-kuriat x86_64 Dual Core AMD Opteron(tm) Processor 285
Gentoo Base System release 1.12.9
Timestamp of tree: Thu, 25 Jan 2007 01:47:01 +0000
dev-java/java-config: 1.3.7, 2.0.31-r3
dev-lang/python: 2.4.4
dev-python/pycrypto: 2.0.1-r5
sys-apps/sandbox: 1.2.18.1
sys-devel/autoconf: 2.13, 2.61
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils: 2.17
sys-devel/gcc-config: 1.3.14
sys-devel/libtool: 1.5.22
virtual/os-headers: 2.6.19.2-r1
ACCEPT_KEYWORDS="amd64 ~amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=opteron -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo /etc/texm f/web2c"
CXXFLAGS="-march=opteron -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks metadata-transfer parallel-fetch sandbox sfperms strict"
GENTOO_MIRRORS="http://gentoo.modulix.net/gentoo http://gentoo.mirrors.tera-byte.com http://distfiles.gentoo.org http://www.i biblio.org/pub/Linux/distributions/gentoo"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="64bit X a52 aac aalib alsa amd amd64 arts automount avi background bash-completion berkdb bitmap-fonts bl bzip2 cairo ch root cli cracklib crypt css cups dbus dga dhcp dlloader dmx dvdread dvi eds emboss encode esd exif fam ffmpeg firefox font-se rver fortran ftp gdbm gif gkrellm gnome gpm gstreamer gtk gtk2 hal http iconv imagemagick isdnlog java jfs jpeg kde libg++ ma d mikmod mp3 mpeg mpeg2 mplayer ncurses nls nptl nptlonly nsplugin ogg opengl openssh openssl opensslcrypt oss pam pcre pda p df pdflib perl png ppds pppd python qt3 qt4 quicktime readline reflection reiserfs samba sdl session sftp smp spell spl ssl t cpd tiff truetype truetype-fonts type1-fonts udev unicode vim vnc vorbis x11vnc xfs xinerama xinetd xml xorg xv zlib" ALSA_CA RDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ELIBC=" glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtx orb ncurses text" USERLAND="GNU"
Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY
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Next, the "eix nvidia-drivers"' :
| Code: | [I] x11-drivers/nvidia-drivers
Available versions: 1.0.8774 1.0.8776 (~)1.0.9631 [M](~)1.0.9742 (~)1.0.9746
Installed versions: 1.0.9746(11:08:21 01/31/07)(dlloader kernel_linux)
Homepage: http://www.nvidia.com/
Description: NVIDIA X11 driver and GLX libraries
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And the "eix xorg-server" :
| Code: | [I] x11-base/xorg-server
Available versions: 1.1.1-r1 1.1.1-r4 (~)1.2.0 [M]*1.2.99.0
Installed versions: 1.2.0(11:07:51 01/31/07)(-3dfx -debug dmx -dri -input_devices_acecad -input_devices_aiptek -input_devices_calcomp -input_devices_citron -input_devices_digitaledge -input_devices_dmc -input_devices_dynapro -input_devices_elo2300 -input_devices_elographics input_devices_evdev -input_devices_fpit -input_devices_hyperpen -input_devices_jamstudio -input_devices_joystick input_devices_keyboard -input_devices_magellan -input_devices_microtouch input_devices_mouse -input_devices_mutouch -input_devices_palmax -input_devices_penmount -input_devices_spaceorb -input_devices_summa -input_devices_synaptics -input_devices_tek4957 -input_devices_ur98 -input_devices_vmmouse -input_devices_void -input_devices_wacom -ipv6 -kdrive -minimal nptl sdl -video_cards_apm -video_cards_ark -video_cards_chips -video_cards_cirrus -video_cards_cyrix -video_cards_dummy -video_cards_epson -video_cards_fbdev -video_cards_fglrx -video_cards_glint -video_cards_i128 -video_cards_i740 -video_cards_i810 -video_cards_impact -video_cards_imstt -video_cards_mach64 -video_cards_mga -video_cards_neomagic -video_cards_newport -video_cards_nsc -video_cards_nv -video_cards_nvidia -video_cards_r128 -video_cards_radeon -video_cards_rendition -video_cards_s3 -video_cards_s3virge -video_cards_savage -video_cards_siliconmotion -video_cards_sis -video_cards_sisusb -video_cards_sunbw2 -video_cards_suncg14 -video_cards_suncg3 -video_cards_suncg6 -video_cards_sunffb -video_cards_sunleo -video_cards_suntcx -video_cards_tdfx -video_cards_tga -video_cards_trident -video_cards_tseng -video_cards_v4l -video_cards_vesa -video_cards_vga -video_cards_via -video_cards_vmware -video_cards_voodoo xorg -xprint)
Homepage: http://xorg.freedesktop.org/
Description: X.Org X servers
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Thanx again, and have a nice day (it's rainy here  ) !
Greg.
_________________
Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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planet-admin
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Joined: 27 Mar 2004
Posts: 213
Location: Boise, ID
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| Posted: Mon Feb 12, 2007 9:25 pm Post subject: |
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Whilst off-topic, I just want to say, that's an impressive setup. I wouldn't mind seeing pictures of that.
Michael
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Dan
Veteran
Joined: 25 Oct 2005
Posts: 1302
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| Posted: Mon Feb 12, 2007 11:39 pm Post subject: |
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you may get improvement from
INPUT_DEVICES="keyboard mouse"
VIDEO_CARDS="nv nvidia vesa"
in make.conf and nvidia to USE and
xorg is built with -video_cards_nv -video_cards_nvidia
You may also want your ALSA_CARDS="youralsadriver" statement too.....
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Tue Feb 13, 2007 9:50 am Post subject: |
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Thanx guys
Here is my actual 'make.conf' file :
| Code: |
CFLAGS="-march=opteron -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j5"
ACCEPT_KEYWORDS="~amd64 amd64"
USE="xorg -dri -ipv6 -ogg -alsa 3dnowext 64bit X a52 aac aalib amd amd64 arts automount avi background bash-completion -bashlogger berkdb bitmap-fonts bl bzip2 cairo chroot cli crypt css cups dbus dga dhcp dlloader dmx dvdread dvi eds elibc_glibc emboss encode esd -ethereal exif fam ffmpeg firefox -flood font-server fortran ftp gdbm gif gkrellm gnome gpm gstreamer gtk gtk2 hal -hddtemp http imagemagick input_devices_evdev input_devices_keyboard input_devices_mouse isdnlog java jfs jpeg kde kernel_linux libg++ mad mikmod mp3 mpeg mpeg2 mmx mplayer ncurses nvidia nls nsplugin nptl nptlonly ogg opengl openssh openssl opensslcrypt oss pam pcre pda pdf pdflib perl png ppds pppd python qt3 qt4 quicktime readline reflection reiserfs samba sdl session sftp smp spell spl sse sse2 ssl tcpd tiff truetype truetype-fonts type1-fonts udev unicode userland_GNU vim vnc vorbis win32codecs x11vnc xfs xinerama xinetd xml xv zlib"
FEATURES="parallel-fetch"
VIDEO_CARDS="nv nvidia vesa"
INPUT_DEVICES="evdev keyboard mouse"
ALSA_CARDS=""
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I disabled alsa, because I don't want sound for the moment. Just a fast 2D/3D display ! I put evdev in INPUT_DEVICES because I use USB mouse (accessing with /dev/input), I thinks it's the "evdev purpose" ?
I'm recompiling and I'll give you the results. If you get other ideas, I take them !
Thanx again,
Greg.
@planet-admin : I'll post a picture with a big gentoo logo when the wall will works correctly 
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Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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Lloeki
Guru
Joined: 14 Jun 2006
Posts: 437
Location: France
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| Posted: Tue Feb 13, 2007 9:55 am Post subject: |
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did you run 'eselect opengl set nvidia' on all nodes?
and agreed, that's one hell of a setup.
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ali3nx
l33t
Joined: 21 Sep 2003
Posts: 722
Location: Winnipeg, Canada
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| Posted: Tue Feb 13, 2007 10:37 am Post subject: |
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Something possibly significant I noticed is you have -dri force excluded in your use flags when it's set by default in the portage profile. That may drastically reduce your xorg performance even with nvidia drivers. it could be worth testing to validate if it is indeed a contributing issue. 
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Dan
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Joined: 25 Oct 2005
Posts: 1302
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| Posted: Tue Feb 13, 2007 2:21 pm Post subject: |
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agreed you probably want dri in USE
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Tue Feb 13, 2007 2:36 pm Post subject: |
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Some (bad) news : No change at all.
Now, my "/etc/make.conf" is like that :
| Code: | CFLAGS="-march=opteron -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j5"
ACCEPT_KEYWORDS="~amd64 amd64"
USE="xorg -ipv6 -ogg -alsa 3dnowext 64bit X a52 aac aalib amd amd64 arts automount avi background bash-completion -bashlogger berkdb bitmap-fonts bl bzip2 cairo chroot cli crypt css -cups dbus dga dhcp dlloader dmx dvdread dvi eds elibc_glibc emboss encode esd -ethereal exif fam ffmpeg firefox -flood font-server fortran ftp gdbm gif gkrellm gnome gpm gstreamer gtk gtk2 hal -hddtemp http imagemagick input_devices_evdev input_devices_keyboard input_devices_mouse isdnlog java jfs jpeg kde kernel_linux libg++ mad mikmod mp3 mpeg mpeg2 mmx mplayer ncurses nvidia nls nsplugin nptl nptlonly ogg opengl openssh openssl opensslcrypt oss pam pcre pda pdf pdflib perl png ppds pppd python qt4 quicktime readline reflection reiserfs samba sdl session sftp smp spell spl sse sse2 ssl tcpd tiff truetype truetype-fonts type1-fonts udev unicode userland_GNU vim vnc vorbis win32codecs x11vnc xfs xinerama xinetd xml xv zlib"
FEATURES="parallel-fetch"
VIDEO_CARDS="nv nvidia vesa"
INPUT_DEVICES="evdev keyboard mouse"
ALSA_CARDS="" |
eix xorg-server gives me :
| Code: |
[I] x11-base/xorg-server
Available versions: 1.1.1-r1 1.1.1-r4 (~)1.2.0 [M]*1.2.99.0
Installed versions: 1.2.0(14:20:33 02/13/07)(-3dfx -debug dmx dri -input_devices_acecad -input_devices_aiptek -input_devices_calcomp -input_devices_citron -input_devices_digitaledge -input_devices_dmc -input_devices_dynapro -input_devices_elo2300 -input_devices_elographics input_devices_evdev -input_devices_fpit -input_devices_hyperpen -input_devices_jamstudio -input_devices_joystick input_devices_keyboard -input_devices_magellan -input_devices_microtouch input_devices_mouse -input_devices_mutouch -input_devices_palmax -input_devices_penmount -input_devices_spaceorb -input_devices_summa -input_devices_synaptics -input_devices_tek4957 -input_devices_ur98 -input_devices_vmmouse -input_devices_void -input_devices_wacom -ipv6 -kdrive -minimal nptl sdl -video_cards_apm -video_cards_ark -video_cards_chips -video_cards_cirrus -video_cards_cyrix -video_cards_dummy -video_cards_epson -video_cards_fbdev -video_cards_fglrx -video_cards_glint -video_cards_i128 -video_cards_i740 -video_cards_i810 -video_cards_impact -video_cards_imstt -video_cards_mach64 -video_cards_mga -video_cards_neomagic -video_cards_newport -video_cards_nsc video_cards_nv video_cards_nvidia -video_cards_r128 -video_cards_radeon -video_cards_rendition -video_cards_s3 -video_cards_s3virge -video_cards_savage -video_cards_siliconmotion -video_cards_sis -video_cards_sisusb -video_cards_sunbw2 -video_cards_suncg14 -video_cards_suncg3 -video_cards_suncg6 -video_cards_sunffb -video_cards_sunleo -video_cards_suntcx -video_cards_tdfx -video_cards_tga -video_cards_trident -video_cards_tseng -video_cards_v4l video_cards_vesa -video_cards_vga -video_cards_via -video_cards_vmware -video_cards_voodoo xorg -xprint) |
glxgears still returns 500fps on the wall, display (2D or 3D) is still looooonnngg.
I added "eselect opengl set nvidia" in my startxdmx script. But it was on nvidia.
I think I need to clean my USE list too. I'll work on that.
_________________
Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org
Last edited by iero on Tue Feb 13, 2007 2:47 pm; edited 1 time in total |
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Tue Feb 13, 2007 2:45 pm Post subject: |
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Ok, some infos about xorg.conf.
Here is my master node xorg conf (the master just have a dual 20 inches screen) :
| Code: |
Section "Files"
FontPath "unix/:7100"
EndSection
Section "Module"
Load "bitmap"
Load "ddc"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "fr"
Option "XkbVariant" "latin9"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
EndSection
Section "Device"
Identifier "NVIDIA Corporation NV45GL [Quadro FX 3400/4400]"
Driver "nvidia"
Option "ConnectedMonitors" "dfp,dfp"
Option "MetaModes" "1600x1200,1600x1200"
Option "TwinViewOrientation" "RightOf"
Option "TwinView"
Option "AllowGLXWithComposite" "true"
EndSection
Section "Monitor"
Identifier "Cinema HD"
VendorName "Generic"
ModelName "APPLE"
HorizSync 31.5-160
VertRefresh 50-160
EndSection
Section "Screen"
Identifier "Default Screen"
Device "NVIDIA Corporation NV45GL [Quadro FX 3400/4400]"
Monitor "Cinema HD"
DefaultDepth 24
Subsection "Display"
depth 24
Modes "1600x1200"
EndSubsection
Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"
EndSection
Section "Extensions"
Option "Composite" "enable"
EndSection
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And nodes xorg.conf :
| Code: |
Section "Files"
FontPath "tcp/node0:7100"
EndSection
Section "Module"
Load "bitmap"
Load "ddc"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "type1"
Load "vbe"
EndSection
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "fr"
Option "XkbVariant" "latin9"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
BusID "PCI:129:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
BusID "PCI:129:0:0"
Screen 1
EndSection
Section "Monitor"
Identifier "Monitor0"
EndSection
Section "Monitor"
Identifier "Monitor1"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Subsection "Display"
depth 24
Modes "2560x1600"
EndSubsection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Subsection "Display"
depth 24
Modes "2560x1600"
EndSubsection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
Screen "Screen1" LeftOf "Screen0"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection
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Some notes :
- I cannot use twinview on the wall because each nvidia quadro 4500 cannot feed 2*"2560x1600" screens in this mode. I will put 4600 cards in the future.
- Screens are 30" dell and not apple, but I didn't change the name in files.
- The font server is working well.
I'm not very good for customising xorg.conf, so maybe some great improvements can be done here. It may be a clue !
Thanx again,
Greg.
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Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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Carlo
Developer
Joined: 12 Aug 2002
Posts: 3356
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| Posted: Tue Feb 13, 2007 4:40 pm Post subject: Re: Gentoo on big Wall Display (10kpixels) - X problems |
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| iero wrote: | | Third, glx doesn't works well. using glxgears, I can get 25 000fps on each node, but 500 fps using the display wall. |
glxgears is also slower on a single screen, when you enlarge its window. It is not a tool to measure performance, but simply shows that basic OpenGL stuff works.
Given that the number of people running display walls is rather low - and doing so on Gentoo even lower, I'd rather contact university people focussing on 3D visualization, CAE, etc. and Xorg people to track down what the limiting factor in your setup is.
| ali3nx wrote: | | Something possibly significant I noticed is you have -dri force excluded in your use flags when it's set by default in the portage profile. That may drastically reduce your xorg performance even with nvidia drivers. |
How do you come to this idea? The Nvidia drivers don't use DRI at all, so there's no benefit enabling this flag.
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didl
Retired Dev
Joined: 09 Sep 2003
Posts: 1106
Location: Pittsburgh, PA
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| Posted: Tue Feb 13, 2007 5:02 pm Post subject: Re: Gentoo on big Wall Display (10kpixels) - X problems |
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| Carlo wrote: |
Given that the number of people running display walls is rather low - and doing so on Gentoo even lower, I'd rather contact university people focussing on 3D visualization, CAE, etc. and Xorg people to track down what the limiting factor in your setup is.
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I believe NCSA (http://www.ncsa.uiuc.edu) had a a fairly large display wall up and
running at SC2006. Here's a link, maybe it is helpful. |
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Dan
Veteran
Joined: 25 Oct 2005
Posts: 1302
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| Posted: Tue Feb 13, 2007 5:43 pm Post subject: Re: Gentoo on big Wall Display (10kpixels) - X problems |
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| Carlo wrote: |
How do you come to this idea? The Nvidia drivers don't use DRI at all, so there's no benefit enabling this flag. |
I disagree completely with this no matter what you being a Developer or nvidia says and yes i have read it all.
I understand that (Option "DRI" "true") will have no effect because you will get something like
| Quote: | | (WW) NVIDIA(0): Option "DRI" is not used |
without the dri module loaded but the dri module can
be loaded with the 97x nvidia-drivers just fine now.
| Quote: | (II) LoadModule: "dri"
(II) Loading /usr/lib/xorg/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
compiled for 7.2.0, module version = 1.0.0
ABI class: X.Org Server Extension, version 0.3
(II) Loading extension XFree86-DRI
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However if xorg is not built with dri in USE and I do not have
| Code: | Section "DRI"
Group 0
Mode 0666
EndSection |
In my xorg.conf I experience many video issues that are non-existent when I have It there.
I cannot explain in detail as to why this is "fact" , because I have no idea. but it is.
Even more so when using composite and beryl or compiz but the rendering issues exist the same.
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Wed Feb 14, 2007 8:56 am Post subject: |
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Hi you all,
In fact, there are no project which can display correctly 2D and 3D trough a config like that. I tried a lot of projects (Chromium, IBM products, sage, ..) but no-one can get good performances and some didn't work on large display at all.
The old Xfree 4.3 was able to display 2D and 3D, but there are big regressions (I don't know if "regression" is an english world.. It is used to say "with the new version, things doesn't work anymore".
So, I try to get the maximum of xorg (and Xdmx) and I think that I'm far away from an efficient system (a lot of improvement can be done with configuration and profiling application.. For example, a recent xorg version flooded the network with debug messages..).
Maybe those improvements are not enough, but I'm digging where I can, and I will be proud to get this wall working with gentoo (The old one was in mandriva, and this one was in ubuntu) !
Thanx for any help, and have a nice wake up !
Greg.
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Des naïfs ne savaient pas que c'était impossible. Alors ils l'ont fait.
iero - http://www.iero.org |
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Lloeki
Guru
Joined: 14 Jun 2006
Posts: 437
Location: France
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iero
n00b
Joined: 02 Jan 2007
Posts: 30
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| Posted: Wed Feb 14, 2007 10:56 am Post subject: |
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| Lloeki wrote: | 'regression' indeed exists in dev' slang, meaning exactly what you said.
you could always try to ask on the nvidia linux forums. |
Thanks !
I just asked on the nividia forum. Now; I'm waiting for help. I heard about a gentoo-cluster group and some members who tried to do something like me. I'm looking for this mailing list.
See ya,
Greg.
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iero - http://www.iero.org |
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