Linux Performance problems

spock · Post by **spock** » 23 Dec 2006 13:55

I haven't played OpenTTD for a while, and I recently installed the 0.4.8 and today the 0.5RC but they seem to be slow.

I tried running the 0.4.8 in windows (It's a dual boot system) and OpenTTD runs great.

Starting OpenTTD in linux gives really big performance problems. The sound is stuttering. (I don't use the midi music, because I don't like it) The graphics are also stuttering. Sometimes it's fluent, and suddenly the graphics 'hang' for a second. Next to that the mouse seems unresponsive, a lot of clicks seem to be ignored.

Trying to find out what caused it I saw this: (top, first number is CPU, second memory)
45.1 2.6 openttd
33.5 9.9 Xorg
So it seems CPU is suddenly a problem? I have an 1600 mghz CPU here, and like I said, OpenTTD works in windows.

But it seems the high X CPU usage is also caused by OpeNTTD, because when OpenTTD is not running it's a lot lower:
6.6 9.3 Xorg

Is anyone else experiencing this too, or is it just me? And how can I solve it?

Btw, sorry for my bad English

Darkvater · Post by **Darkvater** » 23 Dec 2006 14:55

spock wrote:But it seems the high X CPU usage is also caused by OpeNTTD, when OpenTTD is not running:

How can OpenTTD cause high CPU usage when it is not running? You'd better check your system

You have not provided sufficient information. Music in OpenTTD by timidity uses a ton of CPU, try running with music disabled (./openttd -m null). Also CPU usage depends on the mapsize, number of vehicles, etc. You have not told us about those.

spock · Post by **spock** » 23 Dec 2006 15:23

Darkvater wrote: How can OpenTTD cause high CPU usage when it is not running? You'd better check your system

Well, you mis-understood me. I changed the sentence a little bit in my original post now. If you looked at the numbers, you saw X is using 6.6% CPU normally, and 33.5% when OpenTTD is running. The OpenTTD process uses 45.1%.

Darkvater wrote: You have not provided sufficient information. Music in OpenTTD by timidity uses a ton of CPU, try running with music disabled (./openttd -m null).

I know that, although by tweaking the settings of timidity you can bring the CPU usage of timidity down a lot. But I hate the music actually, so I always run with -m null

Darkvater wrote: Also CPU usage depends on the mapsize, number of vehicles, etc. You have not told us about those.

Well, to honestly compare, i just used same savegame both under windows and linux. 256x256 mapsize, 113 vehicles.

In windows everything runs smooth, I can actually open some heavy applications while playing. In Linux, without any extra programs but gnome open, it runs with the problems mentioned in the first post.

spock · Post by **spock** » 28 Dec 2006 14:18

*bounce*

I've now tested the 0.5RC on the same PC in both windows and linux, and the problem persists.

AFAIK the old version I played (0.3.2 I believe, like I said, didn't play it for a long time) ran fine..

Is there anyone who can help me?

Post by **Rubidium** » 28 Dec 2006 14:33

I'm running linux too, however I'm using Xorg 7.1.1, which version are you running?. But I've never had trouble with it.

However, 6.6 percent of the CPU going to Xorg in an idle situation does not sound ok. On my computer it is (on average) less than 1 percent at 600 MHz (at a resolution of 1920x1200 and a running Konsole with top!). When running OpenTTD at max speed, Xorg still uses less than 5 percent CPU.

I therefore think there is a problem with the configuration of X. I suspect you have not configured it to load a (semi) optimized video driver for your video card, i.e. you use the normal VGA driver it (probably) means that SDL has to write every pixel via Xorg to the video device instead of blitting the whole screen to the videocards memory and that takes a lot of CPU cycles. This can be caused by an software upgrade of the system.
That this doesn't happen in Windows is, assuming I'm correct, due to the fact that in Windows it can just blit the whole screen to the memory of the video card instead of doing it pixel per pixel.

spock · Post by **spock** » 28 Dec 2006 15:14

Rubidium wrote:I'm running linux too, however I'm using Xorg 7.1.1, which version are you running?. But I've never had trouble with it.

I'm also running Xorg 7.1.1

Rubidium wrote: I therefore think there is a problem with the configuration of X. I suspect you have not configured it to load a (semi) optimized video driver for your video card

I'm using the Nvidia Driver (There's an GeForce 2 MX in this pc)

Although you're probably right this isn't really openttd's fault. Just by moving the mouse over the screen I can get the Xorg CPU usage to increase quite a bit.

Well, thanks, I'm going to try to maybe downgrade the nvidia driver or something..

SmatZ · Post by **SmatZ** » 28 Dec 2006 17:23

If you can, try running both OpenTTD versions with the same computer configuration. (the same video driver) That should be no problem - just unpack 0.5.0 into one directory, 0.4.8 into second directory and run them (not simultaneously).

Try "time openttd" to check, if the time is spent in Userspace (ttd code) or System (likely SDL video driver)

spock wrote:I've now tested the 0.5RC on the same PC in both windows and linux, and the problem persists.

Does this mean that problem is only on your Linux system?

For GF2MX try using the Legacy 71.84 driver. http://www.nvidia.com/object/unix.html

edit
Isn't AI working in background?

Post by **Rubidium** » 28 Dec 2006 17:26

SDL is also userspace, so it won't show anything.

spock · Post by **spock** » 28 Dec 2006 20:39

Well, it seems you were right, I tried SDL_GetVideoInfo();

hw_available? 0
wm_available? 1
blit_hw? 0
blit_hw_CC? 0
blit_hw_A? 0
blit_sw? 0
blit_sw_CC? 0
blit_sw_A? 0
blit_fill? 0
video memory(in K)? 0
bits per pixel? 32

So for some reason I don't seem to have hardware acceleation anymore. Is there a way to check if my nvidia driver still works? (I think it might be caused by the last X upgrade)

SmatZ · Post by **SmatZ** » 28 Dec 2006 21:51

I found a similiar problem described at SF.net (from known-bugs.txt ...)
http://sourceforge.net/tracker/index.ph ... tid=636365

Changing Color Depth to 8bpp could help you.

Zuu · Post by **Zuu** » 28 Dec 2006 23:38

You might want to try to run the OpenGL-demo

Code: Select all

glxgears

if it is available at your system.

Either you see the wheel traveling around at a more or less decent phase or it goes incredible fast.

(On my Debian Etch system it seams like glxgears is not available anymore, duno if it is a XFree86-only tool or why I cant get it anymore)

Tom_le_mort · Post by **Tom_le_mort** » 29 Dec 2006 14:40

glxgears is available in the mesa-utils package.

maartena · Post by **maartena** » 30 Dec 2006 00:37

spock wrote:Starting OpenTTD in linux gives really big performance problems. The sound is stuttering. (I don't use the midi music, because I don't like it) The graphics are also stuttering. Sometimes it's fluent, and suddenly the graphics 'hang' for a second. Next to that the mouse seems unresponsive, a lot of clicks seem to be ignored.

Oddly enough, this is almost identical to the behaviour I have found in Windows Vista.

Darkvater · Post by **Darkvater** » 30 Dec 2006 10:45

maartena wrote:
spock wrote:Starting OpenTTD in linux gives really big performance problems. The sound is stuttering. (I don't use the midi music, because I don't like it) The graphics are also stuttering. Sometimes it's fluent, and suddenly the graphics 'hang' for a second. Next to that the mouse seems unresponsive, a lot of clicks seem to be ignored.
Oddly enough, this is almost identical to the behaviour I have found in Windows Vista.

Oddly enough, the two have nothing to do with each other

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