Re: 2.6.x kernel sluggish behavior

[William Lee Irwin III]

On Wed, May 26, 2004 at 04:29:58PM +0300, Lenar L?hmus wrote:
> Overall I really like the performance and smoothness of 2.6.x kernels,
> but there has been always one problematic situation.
> It's debian here with X/KDE running. The problem manifests itself
> when one launches acroread-plugin in Mozilla or Mozilla-based browser. 
> Whatever is the reason, but when acroread is launched as browser
> plugin, it makes system quite sluggish. X process starts to consume
> about 70% of cpu time continuosly.
> That would not be a problem usually, but in this case system really 
> feels like hanging and stopping. Mouse cursor on screen stops and
> jumps and does other neat tricks.
> Drawing of pages in acroread is extremely slow. Its very very bad when 
> loaded document is some kind of marketing brochure full of
> pictures/backgrounds etc... Nothing of this when acroread is being
> run as standalone app.

What kernel version is this? Could you try with 2.6.6-mm4 if it was
less recent than that?


On Wed, May 26, 2004 at 04:29:58PM +0300, Lenar L?hmus wrote:
> Even more. This system has several terminals connected to it, and all of 
> them show same sluggish behavior same time. So it's not like X-server
> process running on system is too busy to interact with mouse or draw
> on screen.
> This behavior stops when the window with acroread is closed (or back 
> button pressed when one can direct mouse cursor to that button which
> as you can believe is very hard in this case).
> I think it's definetely a scheduler problem (although caused by 
> application bug).
> You propably need more information. Just ask. I'm happy to help to get 
> this annoying problem disappear.

Some instrumentation is likely in order. 2.6.6-mm4 has schedstats,
which you should log to get us enough information to do something about
this performance problem. Logs of vmstat, top, and snapshots of kernel
profiles, /proc/vmstat, and /proc/meminfo may also help.


-- wli
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/