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Tony Lambregts kirjoitti Maanantai 11. Marraskuuta 2002 07:58:
On Maanantai 11. Marraskuuta 2002 00:49, you wrote :
Well I tried it out with a couple of programs. Things seemed ok with small files but when I tried to run SimCity 3000 (just one of my test programs) It freezes up when loading a city (not a crash). I will try to see why when I get a chance.
I think that the size shouldn't be a problem; wzebra reads out a 17 Mb file... The problem might be that there is only one buffer. If the program reads two files in turns, my code switches the buffer for every read. This is actually slower than without. Maybe it is not freezed, maybe it is just too slow? Another problem might be the buffer switching code.
Well from what I can see it is opening a lot of little files along with the big file so it is slowed down to a crawl not frozen. and with trace on... I think you need more than one than one buffer perhaps. One per file of course. Havent looked that close...
I'll make a version with more, but smaller buffers. I found one bug also; on certain case, a closed file's buffer might has been used for the next opened file with same HANDLE. Where is CLOSEFILE code?! Shouldn't it be on file.c? I need to find it to invalidate the buffer at correct place!
I think that the original problem is that wine opens and closes unix file for every ReadFile. This will propably flush all linux own buffers and linux filesystem has to read the same data over and over again (when application calls ReadFile with small buffers, of course). Opened unix files should be kept open as long as corresponding WINAPI files are open.
BTW. I'm using totally non-MS system. Is there any problem with MS dll's?
Hannu
ps. Could you PLEASE add following line to the mailing list archive configuration file: - ------------------ spamprotect = 1 - ---------------
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Hannu Kotipalo