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A recent patch increased GCC's memory consumption!
- From: gcctest at suse dot de
- To: jh at suse dot cz, hubicka at ucw dot cz, gcc-regression at gcc dot gnu dot org
- Date: Fri, 29 May 2009 09:20:55 +0000
- Subject: A recent patch increased GCC's memory consumption!
Hi,
I am a friendly script caring about memory consumption in GCC. Please
contact jh@suse.cz if something is going wrong.
Comparing memory consumption on compilation of combine.i, insn-attrtab.i,
and generate-3.4.ii I got:
comparing empty function compilation at -O0 level:
Overall memory needed: 8801k
Peak memory use before GGC: 1488k
Peak memory use after GGC: 1437k
Maximum of released memory in single GGC run: 85k
Garbage: 218k
Leak: 1537k
Overhead: 187k
GGC runs: 4
Pre-IPA-Garbage: 210k
Pre-IPA-Leak: 1539k
Pre-IPA-Overhead: 186k
Post-IPA-Garbage: 210k
Post-IPA-Leak: 1539k
Post-IPA-Overhead: 186k
comparing empty function compilation at -O0 -g level:
Overall memory needed: 8825k
Peak memory use before GGC: 1516k
Peak memory use after GGC: 1464k
Maximum of released memory in single GGC run: 87k
Garbage: 219k
Leak: 1570k
Overhead: 192k
GGC runs: 4
Pre-IPA-Garbage: 210k
Pre-IPA-Leak: 1539k
Pre-IPA-Overhead: 186k
Post-IPA-Garbage: 210k
Post-IPA-Leak: 1539k
Post-IPA-Overhead: 186k
comparing empty function compilation at -O1 level:
Overall memory needed: 8801k
Peak memory use before GGC: 1488k
Peak memory use after GGC: 1437k
Maximum of released memory in single GGC run: 90k
Garbage: 223k
Leak: 1537k
Overhead: 188k
GGC runs: 4
Pre-IPA-Garbage: 212k
Pre-IPA-Leak: 1540k
Pre-IPA-Overhead: 186k
Post-IPA-Garbage: 212k
Post-IPA-Leak: 1540k
Post-IPA-Overhead: 186k
comparing empty function compilation at -O2 level:
Overall memory needed: 8941k
Peak memory use before GGC: 1488k
Peak memory use after GGC: 1437k
Maximum of released memory in single GGC run: 90k
Garbage: 228k
Leak: 1537k
Overhead: 189k
GGC runs: 5
Pre-IPA-Garbage: 212k
Pre-IPA-Leak: 1540k
Pre-IPA-Overhead: 186k
Post-IPA-Garbage: 212k
Post-IPA-Leak: 1540k
Post-IPA-Overhead: 186k
comparing empty function compilation at -O3 level:
Overall memory needed: 8929k -> 8933k
Peak memory use before GGC: 1488k
Peak memory use after GGC: 1437k
Maximum of released memory in single GGC run: 90k
Garbage: 228k
Leak: 1537k
Overhead: 189k
GGC runs: 5
Pre-IPA-Garbage: 212k
Pre-IPA-Leak: 1540k
Pre-IPA-Overhead: 186k
Post-IPA-Garbage: 212k
Post-IPA-Leak: 1540k
Post-IPA-Overhead: 186k
comparing combine.c compilation at -O0 level:
Amount of memory still referenced at the end of compilation increased from 7147k to 7171k, overall 0.34%
Overall memory needed: 31457k
Peak memory use before GGC: 17478k
Peak memory use after GGC: 17029k
Maximum of released memory in single GGC run: 1911k
Garbage: 37895k
Leak: 7147k -> 7171k
Overhead: 5490k -> 5490k
GGC runs: 331
Pre-IPA-Garbage: 12530k
Pre-IPA-Leak: 18411k
Pre-IPA-Overhead: 2504k
Post-IPA-Garbage: 12530k
Post-IPA-Leak: 18411k
Post-IPA-Overhead: 2504k
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 33401k
Peak memory use before GGC: 19386k
Peak memory use after GGC: 18869k
Maximum of released memory in single GGC run: 1920k
Garbage: 38110k
Leak: 10441k
Overhead: 6303k
GGC runs: 315
Pre-IPA-Garbage: 12549k
Pre-IPA-Leak: 20660k
Pre-IPA-Overhead: 2986k
Post-IPA-Garbage: 12549k
Post-IPA-Leak: 20660k
Post-IPA-Overhead: 2986k
comparing combine.c compilation at -O1 level:
Overall memory needed: 32053k -> 31913k
Peak memory use before GGC: 16555k
Peak memory use after GGC: 16383k
Maximum of released memory in single GGC run: 1378k
Garbage: 45806k
Leak: 7156k
Overhead: 6440k -> 6440k
GGC runs: 388
Pre-IPA-Garbage: 13405k
Pre-IPA-Leak: 17702k
Pre-IPA-Overhead: 2552k
Post-IPA-Garbage: 13405k
Post-IPA-Leak: 17702k
Post-IPA-Overhead: 2552k
comparing combine.c compilation at -O2 level:
Overall memory needed: 32985k -> 32989k
Peak memory use before GGC: 16628k
Peak memory use after GGC: 16454k
Maximum of released memory in single GGC run: 1489k
Garbage: 56306k -> 56306k
Leak: 7188k
Overhead: 8033k -> 8033k
GGC runs: 441
Pre-IPA-Garbage: 13435k
Pre-IPA-Leak: 17724k
Pre-IPA-Overhead: 2555k
Post-IPA-Garbage: 13435k
Post-IPA-Leak: 17724k
Post-IPA-Overhead: 2555k
comparing combine.c compilation at -O3 level:
Overall memory needed: 36797k -> 37029k
Peak memory use before GGC: 16727k
Peak memory use after GGC: 16557k
Maximum of released memory in single GGC run: 1681k
Garbage: 80462k
Leak: 7249k
Overhead: 11103k -> 11103k
GGC runs: 527
Pre-IPA-Garbage: 13435k
Pre-IPA-Leak: 17759k
Pre-IPA-Overhead: 2555k
Post-IPA-Garbage: 13435k
Post-IPA-Leak: 17759k
Post-IPA-Overhead: 2555k
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 152505k
Peak memory use before GGC: 65254k
Peak memory use after GGC: 52818k
Maximum of released memory in single GGC run: 26250k
Garbage: 128569k
Leak: 9587k
Overhead: 16691k
GGC runs: 258
Pre-IPA-Garbage: 40782k
Pre-IPA-Leak: 51014k
Pre-IPA-Overhead: 7761k
Post-IPA-Garbage: 40782k
Post-IPA-Leak: 51014k
Post-IPA-Overhead: 7761k
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 153817k
Peak memory use before GGC: 66520k
Peak memory use after GGC: 54081k
Maximum of released memory in single GGC run: 26251k
Garbage: 128907k
Leak: 11219k
Overhead: 17144k
GGC runs: 252
Pre-IPA-Garbage: 40791k
Pre-IPA-Leak: 52539k
Pre-IPA-Overhead: 8091k
Post-IPA-Garbage: 40791k
Post-IPA-Leak: 52539k
Post-IPA-Overhead: 8091k
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 154577k -> 154545k
Peak memory use before GGC: 54972k
Peak memory use after GGC: 44902k
Maximum of released memory in single GGC run: 17233k
Garbage: 181124k
Leak: 9178k
Overhead: 23427k
GGC runs: 298
Pre-IPA-Garbage: 45256k
Pre-IPA-Leak: 45116k
Pre-IPA-Overhead: 7607k
Post-IPA-Garbage: 45256k
Post-IPA-Leak: 45116k
Post-IPA-Overhead: 7607k
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 202205k -> 202421k
Peak memory use before GGC: 54418k
Peak memory use after GGC: 44649k
Maximum of released memory in single GGC run: 18696k
Garbage: 211641k
Leak: 9193k
Overhead: 29298k
GGC runs: 331
Pre-IPA-Garbage: 45281k
Pre-IPA-Leak: 45120k
Pre-IPA-Overhead: 7609k
Post-IPA-Garbage: 45281k
Post-IPA-Leak: 45120k
Post-IPA-Overhead: 7609k
comparing insn-attrtab.c compilation at -O3 level:
Overall memory needed: 206109k -> 205857k
Peak memory use before GGC: 54430k
Peak memory use after GGC: 44658k
Maximum of released memory in single GGC run: 18679k
Garbage: 229893k
Leak: 9211k
Overhead: 31200k -> 31200k
GGC runs: 351
Pre-IPA-Garbage: 45281k
Pre-IPA-Leak: 45120k
Pre-IPA-Overhead: 7609k
Post-IPA-Garbage: 45281k
Post-IPA-Leak: 45120k
Post-IPA-Overhead: 7609k
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 146421k -> 146321k
Peak memory use before GGC: 81868k
Peak memory use after GGC: 81058k
Maximum of released memory in single GGC run: 13542k
Garbage: 192383k -> 192383k
Leak: 55448k
Overhead: 28823k -> 28823k
GGC runs: 436
Pre-IPA-Garbage: 105277k
Pre-IPA-Leak: 84587k
Pre-IPA-Overhead: 15579k
Post-IPA-Garbage: 105277k
Post-IPA-Leak: 84587k
Post-IPA-Overhead: 15579k
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 163813k -> 163689k
Peak memory use before GGC: 95614k
Peak memory use after GGC: 94667k
Maximum of released memory in single GGC run: 13985k
Garbage: 197353k -> 197353k
Leak: 82400k
Overhead: 35357k -> 35357k
GGC runs: 409
Pre-IPA-Garbage: 105779k
Pre-IPA-Leak: 101036k
Pre-IPA-Overhead: 19072k
Post-IPA-Garbage: 105779k
Post-IPA-Leak: 101036k
Post-IPA-Overhead: 19072k
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 108637k -> 108649k
Peak memory use before GGC: 82538k
Peak memory use after GGC: 81713k
Maximum of released memory in single GGC run: 13775k
Garbage: 269058k -> 269059k
Leak: 52272k
Overhead: 31688k -> 31689k
GGC runs: 525
Pre-IPA-Garbage: 153885k
Pre-IPA-Leak: 86856k -> 86855k
Pre-IPA-Overhead: 19248k -> 19248k
Post-IPA-Garbage: 153885k
Post-IPA-Leak: 86856k -> 86855k
Post-IPA-Overhead: 19248k -> 19248k
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 108125k -> 108129k
Peak memory use before GGC: 82565k -> 82566k
Peak memory use after GGC: 80858k
Maximum of released memory in single GGC run: 13773k
Garbage: 304549k -> 304549k
Leak: 52369k
Overhead: 36687k -> 36687k
GGC runs: 569
Pre-IPA-Garbage: 156917k
Pre-IPA-Leak: 85949k -> 85949k
Pre-IPA-Overhead: 19461k -> 19461k
Post-IPA-Garbage: 156917k
Post-IPA-Leak: 85949k -> 85949k
Post-IPA-Overhead: 19461k -> 19461k
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 114441k -> 114521k
Peak memory use before GGC: 83031k -> 83032k
Peak memory use after GGC: 80966k -> 80967k
Maximum of released memory in single GGC run: 13773k
Garbage: 335373k -> 335372k
Leak: 52415k
Overhead: 40618k -> 40618k
GGC runs: 606
Pre-IPA-Garbage: 156917k
Pre-IPA-Leak: 85953k
Pre-IPA-Overhead: 19461k
Post-IPA-Garbage: 156917k
Post-IPA-Leak: 85953k
Post-IPA-Overhead: 19461k
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 358717k -> 358789k
Peak memory use before GGC: 78173k
Peak memory use after GGC: 49107k
Maximum of released memory in single GGC run: 37057k
Garbage: 140190k
Leak: 7711k
Overhead: 24960k
GGC runs: 86
Pre-IPA-Garbage: 12171k
Pre-IPA-Leak: 18626k
Pre-IPA-Overhead: 2403k
Post-IPA-Garbage: 12171k
Post-IPA-Leak: 18626k
Post-IPA-Overhead: 2403k
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 359521k -> 359561k
Peak memory use before GGC: 78856k
Peak memory use after GGC: 49791k
Maximum of released memory in single GGC run: 37041k
Garbage: 140255k
Leak: 9707k
Overhead: 25529k
GGC runs: 94
Pre-IPA-Garbage: 12173k
Pre-IPA-Leak: 18873k
Pre-IPA-Overhead: 2456k
Post-IPA-Garbage: 12173k
Post-IPA-Leak: 18873k
Post-IPA-Overhead: 2456k
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 309041k -> 308773k
Peak memory use before GGC: 80235k
Peak memory use after GGC: 69462k
Maximum of released memory in single GGC run: 38514k
Garbage: 224434k
Leak: 9462k
Overhead: 32358k
GGC runs: 95
Pre-IPA-Garbage: 41119k
Pre-IPA-Leak: 63974k
Pre-IPA-Overhead: 7105k
Post-IPA-Garbage: 41119k
Post-IPA-Leak: 63974k
Post-IPA-Overhead: 7105k
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 517633k -> 518213k
Peak memory use before GGC: 80260k
Peak memory use after GGC: 69463k
Maximum of released memory in single GGC run: 38750k
Garbage: 266746k
Leak: 9463k
Overhead: 42002k
GGC runs: 107
Pre-IPA-Garbage: 90152k
Pre-IPA-Leak: 80240k
Pre-IPA-Overhead: 11095k
Post-IPA-Garbage: 90152k
Post-IPA-Leak: 80240k
Post-IPA-Overhead: 11095k
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 1031089k -> 1031281k
Peak memory use before GGC: 135102k
Peak memory use after GGC: 126444k
Maximum of released memory in single GGC run: 54329k
Garbage: 329142k
Leak: 10302k
Overhead: 42368k
GGC runs: 106
Pre-IPA-Garbage: 90152k
Pre-IPA-Leak: 80240k
Pre-IPA-Overhead: 11095k
Post-IPA-Garbage: 90152k
Post-IPA-Leak: 80240k
Post-IPA-Overhead: 11095k
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-haydn-memory/x86_64/mem-result/ChangeLog 2009-05-29 01:38:54.000000000 +0000
+++ /usr/src/SpecTests/sandbox-haydn-memory/gcc/gcc/ChangeLog 2009-05-29 07:03:50.000000000 +0000
@@ -1,3 +1,8 @@
+2009-05-29 Kai Tietz <kai.tietz@onevision.com>
+
+ * tree.c (handle_dll_attribute): Check if node is
+ of kind FUNCTION_DECL for DECL_DECLARED_INLINE_P check.
+
2009-05-29 Richard Earnshaw <rearnsha@arm.com>
* config/arm/thumb2.md (thumb2_zero_extendsidi2): Add a split
The results can be reproduced by building a compiler with
--enable-gather-detailed-mem-stats targetting x86-64
and compiling preprocessed combine.c or testcase from PR8632 with:
-fmem-report --param=ggc-min-heapsize=1024 --param=ggc-min-expand=1 -Ox -Q
The memory consumption summary appears in the dump after detailed listing
of the places they are allocated in. Peak memory consumption is actually
computed by looking for maximal value in {GC XXXX -> YYYY} report.
Your testing script.