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[Bug middle-end/12524] [tree-ssa] Slow-down and memory consumption increased 6x (C++ code, -O3)
- From: "dberlin at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Nov 2003 19:34:34 -0000
- Subject: [Bug middle-end/12524] [tree-ssa] Slow-down and memory consumption increased 6x (C++ code, -O3)
- References: <20031006151159.12524.gerald@pfeifer.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From dberlin at gcc dot gnu dot org 2003-11-17 19:34 -------
At least on my machine:
for -O2, it hits a high mark of 251 meg, and generally stays around 150 meg.
for -O3, it hits a high mark of well over 750 meg.
The parser time blowup still applies.
Either we've got a memory leak somewhere at -O3 that this tickles, or we are
doing a seriously horrible job of actually releasing pages.
I say this because even as the memory is still increasing at 10 or 15 meg a
second, the GC thinks we have no more than 100 meg GC allocated, and it's not
increasing anywhere near that fast:
IE
{GC 100425k -> 76048k} (we have 650 meg really allocated)
...
{GC 103093k -> 77614k} (we have 750 meg really allocated)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12524