Re: sound support more info - kde2 porting status

[Christopher Faylor <cgf at redhat dot com>]

On Sun, Oct 21, 2001 at 02:29:04AM +0200, Ralf Habacker wrote:
>The problem is caused by dll_list:alloc() in the loop "Search for space
>after the DLL".  I have found that in one app the exit after
>VirtualQuery() and in other app the exit after if (i == RETRIES)
>occures.  After looking around I tried to increase the RETRIES constant
>to 1000.  This fix the error.  Hmmh, does this really fix this ???

If setting the number up fixes the problem, then, yes, it probably is
a real fix.  However, read on.

>Can anyone tell me, whats could be going wrong with this stuff ?

The loop that you presented (which I snipped) is trying to find space
just after a just-loaded DLL in which to place info on the DLL.

If it really has to go through 1000 regions of memory to find a place
for this, then it could potentially be pretty slow.  This would show
up as slow loading of DLLs.

You'll also see some slowness from other regions of this file on
loading DLLs since, after a fork, we need to make sure that DLLs in
the forked process are in the same location as the parent.  Windows
does not offer a way to do this, so cygwin kludges this behavior
by all available space up to the point where the DLL should load and
then loading the DLL.  This is a very slow operation and it may
be why you are seeing slow loading of DLLs.

Anyway, I checked in the RETRIES increase so it will be in the next
snapshot and, eventually, 1.3.4.

Btw, are you able to use gdb since yesterday's update?

cgf