[iyonix-support] Re: Lazy Task Swapping on Iyonix/RISC OS 5.11

On 23 Jun 2006, Chris Evans wrote:
> On Fri 23 Jun, Ste (PlusNet) wrote:
>> 
>> On 23 Jun, jb <jwb@xxxxxxxxxx> wrote:
>> > Hi Roger
>> > having examined the sprite data you sent:
>> >
>> > the 'wrong data' is 8k in length starting at offset &298ffc, and is, or
>> > appears to be, font data.
>> 
>> More specifically, it includes a font list similar to that output by the
>> *FontCat command. I can't see any point in Organizer's workspace where it
>> stores this kind of structure so I'd be tempted to rule that application out
>> for the time being.
>> 
>> Also, I use POPstar and Organizer all day, every day, (this Iyonix is on
>> 24/7 and has been for years). I have never seen the effect which is being
>> described in this thread. I'm running RO 5.09 in 1280x1024x16M if that
>> helps. I have sprite backdrops and 128MB RAM.
>> 
>> > the fact that it starts at 298ffc is intriguing, because if was saved by
>> > *screensave, then I suspect it would have omitted the first 4 bytes of the
>> > screen area, hence effective start point is on a 4k page boundary. i.e. it
>> > is 2 pages of data. who owned it I'm not sure (options include your 2
>> > progs, and also the fontmanager ..)
>> 
>> Might be looking at the contents of any suspect applications' wimpslots (you
>> can capture them with Zap) and then searching for something along the lines
>> of "Homerton.Medium.Oblique" so see if you can spot any lists similar to the
>> *FontCat output.
>> 
>> I'd also check any dynamic areas associated with the applications - maybe
>> also the "PCI shared memory" area to see if something there from there is
>> being 'leaked' into other appslots (or the screen memory).
> 
> Am I correct in believing that only wimp slot memory is remapped in LTS?
> And that wimp slot memory is only used by the application and its
> variables/data?
> 
> The suggestion has been made that the backdrop may not be the only memory to
> be being corrupted by the bug and that corruption of other memory could be
> causing some hangs, the most obvious other memory would be wimpslot but..
> 
> If application memory was being corrupted then I'd expect BASIC programes to
> fall over with various errors e.g. no such variable at line X or No TO at
> line Y but no reports of these sort of errors seem to have been made.

Sorry, that is in-correct. I made a report to Iyo-Support several 
months ago about lines of pixels appearing when I used Variations and 
OvPro together. If you continue using them, not only might you get 
more lines of pixels, but also one or other App fails with a different 
error message each time. I'm sure I reported all this months before.


-- 

Cheers
Roger

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