| View previous topic :: View next topic |
| Author |
Message |
pholthau
Guru
Joined: 27 Nov 2005
Posts: 361
Location: Bielefeld, Germany
|
 Posted: Mon Apr 16, 2007 7:44 pm Post subject: system "feeling" slow |
 |
|
I cannot really explain why, but sometimes my system seems to be slow.
sometimes i think it could be related to my kernel config or make.conf. But i am not such an expert that i could find this...
I would appreciate it very much, if you would take a look at it and point some (obvious) misconfiguration or performance leak.
Some System related information is given below (If you need more, just ask for it):
uname -a
| Code: |
Linux thrall 2.6.20-gentoo-r5 #1 SMP Sun Apr 8 10:35:41 CEST 2007 i686 Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz GenuineIntel GNU/Linux
|
lspci
| Code: |
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 4 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation Unknown device 0298 (rev a1)
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832
03:01.1 Generic system peripheral [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
03:01.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 01)
03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
|
fstab
| Code: |
/dev/sda1 /boot ext2 noauto,noatime 1 2
/dev/sda2 none swap sw 0 0
/dev/sda5 / ext3 noatime,data=journal 0 1
/dev/sda6 /home ext3 noatime,data=journal 0 1
/dev/sda7 /opt ext3 noatime,data=journal 0 1
/dev/sda8 /usr/portage ext3 noatime,data=journal 0 1
/dev/sr0 /mnt/cdrom iso9660 noauto,ro,user 0 0
proc /proc proc defaults 0 0
shm /dev/shm tmpfs nodev,nosuid,noexec 0 0
tmpfs /tmp tmpfs size=200m 0 0
|
emerge --info
http://wwwhomes.uni-bielefeld.de/pholthaus/public/system/emerge-info.txt
.config
http://wwwhomes.uni-bielefeld.de/pholthaus/public/system/config.txt
xorg.conf
http://wwwhomes.uni-bielefeld.de/pholthaus/public/system/xorg.txt
_________________
The message is Feierei, alder! The message is Gude Laune, alder! [Sven] |
|
| Back to top |
|
 |
Flipperrr
Tux's lil' helper
Joined: 26 Mar 2003
Posts: 83
Location: Netherlands
|
| Posted: Mon Apr 16, 2007 8:12 pm Post subject: |
|
|
| This will probably not give you the performance boost you're looking for, but it looks like you have a core duo cpu. In that case, I think you should use "-march=prescott". But before you change anything, compare your "cat /proc/cpuinfo" with the data on this page: http://gentoo-wiki.com/Safe_Cflags |
|
| Back to top |
|
|
pholthau
Guru
Joined: 27 Nov 2005
Posts: 361
Location: Bielefeld, Germany
|
| Posted: Wed Apr 18, 2007 6:16 am Post subject: |
|
|
I thought about switching to
CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer"
or
CFLAGS="-march=nocona -O2 -pipe -fomit-frame-pointer"
but i think this would imply a full rebuild, doesn't it?
_________________
The message is Feierei, alder! The message is Gude Laune, alder! [Sven] |
|
| Back to top |
|
|
PaulBredbury
Watchman
Joined: 14 Jul 2005
Posts: 7310
|
| Posted: Wed Apr 18, 2007 6:58 am Post subject: |
|
|
Don't even bother changing CFLAGS. prescott would be the choice for i686, not nocona.
Check the many threads regarding "hdparm", that your kernel is using DMA for them. It's a kernel configuration thing. Also check for PREEMPT in the kernel.
| Code: | grep DMA /usr/src/linux/.config
grep PREEMPT /usr/src/linux/.config |
|
|
| Back to top |
|
|
pholthau
Guru
Joined: 27 Nov 2005
Posts: 361
Location: Bielefeld, Germany
|
| Posted: Wed Apr 18, 2007 7:51 am Post subject: |
|
|
From Save_CFLAGS:
| Quote: |
Note: Intel officially recommends 'nocona' for 32 bit as well, why is this set to 'prescott'? There is a Gentoo discussion, which says 'prescott' is faster, but this is not what Intel recommends. 'prescott' plus '64BIT', 'CX16' and 'NO_SAHF' is the very same as 'nocona'
|
That's why I thought nocona would be good.
The Kernel is set to voluntary preempt:
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_BKL=y
Should I enable DMA even if I own a SATA drive?
_________________
The message is Feierei, alder! The message is Gude Laune, alder! [Sven] |
|
| Back to top |
|
|
PaulBredbury
Watchman
Joined: 14 Jul 2005
Posts: 7310
|
| Posted: Wed Apr 18, 2007 9:05 am Post subject: |
|
|
| pholthau wrote: | 32 bit
'64BIT' |
You're on i686 - that's 32-bit. I'm using prescott. I'm not sure whether nocona will help, hinder, or royally screw it up. I feel no urge to try, for a 0.0001% probable difference.
| Quote: | | The Kernel is set to voluntary preempt |
Which is not as good as CONFIG_PREEMPT. But the first thing to check is:
| Quote: | | Should I enable DMA even if I own a SATA drive? |
You should ensure that your hard drives are running at their full potential.
| Code: | $ hdparm -tT /dev/sda
Timing cached reads: 7928 MB in 2.00 seconds = 3969.74 MB/sec
Timing buffered disk reads: 200 MB in 3.01 seconds = 66.36 MB/sec |
|
|
| Back to top |
|
|
pholthau
Guru
Joined: 27 Nov 2005
Posts: 361
Location: Bielefeld, Germany
|
| Posted: Wed Apr 18, 2007 10:55 am Post subject: |
|
|
| Code: |
/dev/sda:
Timing cached reads: 7500 MB in 1.99 seconds = 3767.02 MB/sec
Timing buffered disk reads: 114 MB in 3.00 seconds = 37.96 MB/sec
|
Does enabling DMA make any sense for my disk?
_________________
The message is Feierei, alder! The message is Gude Laune, alder! [Sven] |
|
| Back to top |
|
|
pholthau
Guru
Joined: 27 Nov 2005
Posts: 361
Location: Bielefeld, Germany
|
| Posted: Thu Apr 19, 2007 6:09 pm Post subject: |
|
|
sry for double post... but does nobody know some tweak? 
_________________
The message is Feierei, alder! The message is Gude Laune, alder! [Sven] |
|
| Back to top |
|
|
|
Kernel & Hardware
