Hi Zhengyu, Thanks for your response. I was running a minimal set of extensions, but even after disabling all of them, there is no change. You mean a real tty (Ctrl - Alt - F1)? If so, when I run the command on that tty the problem is not present. Gnome shell only reached a maximum of 50% and not 200% as perviously shown. Regards, Pico On Fri, Aug 31, 2012 at 1:38 PM, Zhengyu Xu <xzy3186@gmail.com> wrote:

Hi Pico,

Have you tried to check your cpu usage after disabling all the gnome-shell-extensions? And how about the cpu usage when you run the command in tty rather than gnome-terminal?

Regards, Z.

On Fri, 2012-08-31 at 13:32 +0200, Pico Geyer wrote:

...

Hi all.

I'm having a performance issue with gnome shell and I wonder if anyone can provide me with some advice. Gnome shell seems to be using a lot of my cpu resources. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 949 pico 20 0 1923m 204m 21m S 203.3 5.4 136:04.53 gnome-shell

When I enable threaded mode in top (H) is see this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 953 pico 20 0 1923m 204m 21m R 50.1 5.4 31:22.91 gnome-shell 955 pico 20 0 1923m 204m 21m R 48.7 5.4 31:41.81 gnome-shell 952 pico 20 0 1923m 204m 21m R 47.1 5.4 31:03.14 gnome-shell 954 pico 20 0 1923m 204m 21m R 45.1 5.4 31:22.46 gnome-shell

That is it's using about 50% of each of my cores on my quad core system. This high cpu usage starts when I run a command that produces a lot of output on the terminal. For my own use case I was importing the boost repostory into git. git svn clone http://svn.boost.org/svn/boost But the problem can be reproduced using the 'yes' command as well.

Can anyone explain this high cpu usage? It happens even if I minimize the window producing the output. Is it worth submitting a bug report for it?

I'm on a T510 Lenovo laptop with an updated Arch and I'm using the nouveau driver.

Thanks in advance for any suggestions. Regards, Pico

On Fri, Aug 31, 2012 at 1:55 PM, Damjan Georgievski <gdamjan@gmail.com> wrote:

...

I'm having a performance issue with gnome shell and I wonder if anyone can provide me with some advice. ... I'm on a T510 Lenovo laptop with an updated Arch and I'm using the nouveau driver.

Can you paste the output of (it should be 2 lines): glxinfo | grep render

It should say direct rendering: Yes OpenGL renderer string: [something about nouveau]

Hi damjan, Here we go: direct rendering: Yes OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x301) GL_NV_conditional_render, GL_AMD_draw_buffers_blend, Pico

On Fri, Aug 31, 2012 at 2:09 PM, Jan Steffens <jan.steffens@gmail.com> wrote:

On Fri, Aug 31, 2012 at 2:06 PM, Pico Geyer <picogeyer@gmail.com> wrote:

...

Hi damjan,

Here we go: direct rendering: Yes OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x301) GL_NV_conditional_render, GL_AMD_draw_buffers_blend,

Pico

You're using software rendering. No wonder it's slow.

What's your video card? Are the drivers installed? How do you start gnome? startx? GDM?

Oh, I didn't realize. llvm-pipe = software rendering? I thought all I had to do was install xf86-video-nouveau. I start GDM with the inittab method: x:5:respawn:/usr/sbin/gdm -nodaemon The graphics card seems to be a nvidia NVS 3100M Here's the line from lspci: 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT218 [NVS 3100M] [10de:0a6c] (rev a2) (prog-if 00 [VGA controller]) Thanks for your help. Pico

On Fri, Aug 31, 2012 at 4:06 PM, Pico Geyer <picogeyer@gmail.com> wrote:>

I thought nouveau-dri was mainly for opengl type acceleration. Is there something I can go read to clear this up?

GNOME Shell uses OpenGL.