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Re: address@hidden: reproducible cygwin memory problems]
From: |
David Kastrup |
Subject: |
Re: address@hidden: reproducible cygwin memory problems] |
Date: |
Fri, 04 Aug 2006 08:48:01 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Richard Stallman <address@hidden> writes:
> Would someone please help him investigate this -- then ack this message?
>
> Are the images kept in a cache? Is there a way to clear it?
>
They are, and he does already clear the cache:
> after killing the buffer with the image and using
> M-:(clear-image-cache t)RET: 16476;
Incidentally, the cache is there since we are very inefficient turning
image data into images: it would probably make sense to let gdk (or
equivalent code working on entire images) handle this where available
(the main problem is that the conversion is done pixel-by-pixel).
But that is a long-standing peeve of mine, and certainly not something
to be tackled for Emacs 22.
The memory issues, however, are a different thing. I guess it might
be because image data gets allocated by xmalloc, out of Emacs' memory
pool. xmalloc would not be able to make use of previous small memory
allocations.
> after editing a large image: 39164;
>
> again quit+clear cache: 34484;
>
> edit small+medium+large images: 58936;
>
> quit+clear: 87636... (increased!)
>
> I hope someone can look into this, and I am happy to provide
> information given specific instructions.
>
> thanks... EU
>
>
> In GNU Emacs 22.0.50.1 (i686-pc-cygwin, X toolkit, Xaw3d scroll bars)
> of 2006-07-31 on cata2
The problem might be related to the "malloc" or equivalent memory
allocation strategy that is available on a copmilation for Cygwin.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum