calloc() more then 140MB under cygwin b19.1?

Stipe Tolj
Tue Sep 8 15:53:00 GMT 1998

> I finally was forced to test cygwin b19.1, because my prog runs for hours
> under Interix (formerly OpenNT), whereas it's extremely fast under Linux,
> using about 300 out of 512MB RAM.
> Under b19.1, I get NULL from calloc() after only about 140MB.
> Isn't HEAP_CHUNK_SIZE eliminated? At least I got no such messages...
> BTW, while I'm typing this, I'm also testing UWIN 1.51 with egcs.
> It's not yet finished and took already seven times the CPU of Linux!
> Could it be a general NT4.0SP3 alloc/free performance problem?

So, if your are working on that big memory allocs I would consider to use
Linux anyway.

But try at least b19.2 patch from Sergey at .

Regards, Stipe.

Stipe Tolj <>
Cygwin32 Porting Project
Department of Economical Computer Science
University of Cologne, Germany

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