Poor performance when using Texas Instruments code generation tools in Wine
mh at codeweavers.com
Tue Feb 22 08:30:48 CST 2005
On Tue, 22 Feb 2005 12:52:33 +0100, Anders Rønningen wrote:
> We have done some profiling using oprofile, and found that most of this
> time (96%) is spent in the HEAP_FindFreeBlock* *function in the ntdll
> module. The time needed to locate a free heap block increases gradually,
> from a few iterations up to about 15000 in the project we are building.
> We suspect that this may be due to fragmentation caused by the heap
> allocate/free algorithms.
That is quite possible. You can get a dump of the heap by doing a +heap
trace, so there must be a function somewhere that generates it. Just
trigger that when HeapFree gets too slow and see what it looks like.
You might (*might*) be able to get a feel for this by hacking the code to
use glibcs malloc/free instead of our own heap implementation (but
only when accessing the process heap). I do not know what might break if
you do that. Doug Leas malloc may or may not be higher performance than
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