A recent patch increased GCC's memory consumption!
gcctest@suse.de
gcctest@suse.de
Tue May 20 23:06:00 GMT 2008
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: 8183k -> 8181k
Peak memory use before GGC: 1105k
Peak memory use after GGC: 1001k
Maximum of released memory in single GGC run: 129k
Garbage: 238k
Leak: 959k
Overhead: 80k
GGC runs: 2
Testing has produced no results
Testing has produced no results
comparing empty function compilation at -O0 -g level:
Overall memory needed: 8199k -> 8197k
Peak memory use before GGC: 1132k
Peak memory use after GGC: 1036k
Maximum of released memory in single GGC run: 128k
Garbage: 241k
Leak: 992k
Overhead: 85k
GGC runs: 4
Testing has produced no results
Testing has produced no results
comparing empty function compilation at -O1 level:
Overall memory needed: 8251k -> 8253k
Peak memory use before GGC: 1105k
Peak memory use after GGC: 1001k
Maximum of released memory in single GGC run: 131k
Garbage: 240k
Leak: 959k
Overhead: 81k
GGC runs: 2
Pre-IPA-Garbage: 228k
Pre-IPA-Leak: 962k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 228k
Post-IPA-Leak: 962k
Post-IPA-Overhead: 79k
comparing empty function compilation at -O2 level:
Overall memory needed: 8271k -> 8273k
Peak memory use before GGC: 1105k
Peak memory use after GGC: 1002k
Maximum of released memory in single GGC run: 134k
Garbage: 244k
Leak: 960k
Overhead: 82k
GGC runs: 2
Pre-IPA-Garbage: 228k
Pre-IPA-Leak: 962k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 228k
Post-IPA-Leak: 962k
Post-IPA-Overhead: 79k
comparing empty function compilation at -O3 level:
Overall memory needed: 8275k -> 8273k
Peak memory use before GGC: 1105k
Peak memory use after GGC: 1002k
Maximum of released memory in single GGC run: 134k
Garbage: 244k
Leak: 960k
Overhead: 82k
GGC runs: 2
Pre-IPA-Garbage: 228k
Pre-IPA-Leak: 962k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 228k
Post-IPA-Leak: 962k
Post-IPA-Overhead: 79k
comparing combine.c compilation at -O0 level:
Overall memory needed: 22631k -> 22629k
Peak memory use before GGC: 7774k
Peak memory use after GGC: 7150k
Maximum of released memory in single GGC run: 1545k
Garbage: 37775k
Leak: 5479k
Overhead: 4616k
GGC runs: 371
Testing has produced no results
Testing has produced no results
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 24715k -> 24713k
Peak memory use before GGC: 9708k
Peak memory use after GGC: 9047k
Maximum of released memory in single GGC run: 1832k
Garbage: 38144k
Leak: 8674k
Overhead: 5412k
GGC runs: 341
Testing has produced no results
Testing has produced no results
comparing combine.c compilation at -O1 level:
Overall memory needed: 32771k -> 32765k
Peak memory use before GGC: 16182k
Peak memory use after GGC: 16018k
Maximum of released memory in single GGC run: 1375k
Garbage: 51456k -> 51454k
Leak: 5648k
Overhead: 5730k -> 5730k
GGC runs: 439
Pre-IPA-Garbage: 13900k -> 13899k
Pre-IPA-Leak: 16974k
Pre-IPA-Overhead: 2086k -> 2086k
Post-IPA-Garbage: 13900k -> 13899k
Post-IPA-Leak: 16974k
Post-IPA-Overhead: 2086k -> 2086k
comparing combine.c compilation at -O2 level:
Amount of memory still referenced at the end of compilation increased from 5964k to 5971k, overall 0.12%
Overall memory needed: 34543k -> 34545k
Peak memory use before GGC: 16272k -> 16281k
Peak memory use after GGC: 16110k
Maximum of released memory in single GGC run: 1304k
Garbage: 71633k -> 71599k
Leak: 5964k -> 5971k
Overhead: 8071k -> 8069k
GGC runs: 509
Pre-IPA-Garbage: 14052k -> 14051k
Pre-IPA-Leak: 17038k
Pre-IPA-Overhead: 2099k -> 2099k
Post-IPA-Garbage: 14052k -> 14051k
Post-IPA-Leak: 17038k
Post-IPA-Overhead: 2099k -> 2099k
comparing combine.c compilation at -O3 level:
Overall memory needed: 38699k -> 38701k
Peak memory use before GGC: 16365k
Peak memory use after GGC: 16126k
Maximum of released memory in single GGC run: 2439k
Garbage: 91487k -> 91412k
Leak: 6035k -> 6035k
Overhead: 10603k -> 10598k
GGC runs: 544
Pre-IPA-Garbage: 14054k -> 14052k
Pre-IPA-Leak: 17049k
Pre-IPA-Overhead: 2101k -> 2101k
Post-IPA-Garbage: 14054k -> 14052k
Post-IPA-Leak: 17049k
Post-IPA-Overhead: 2101k -> 2101k
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 137447k -> 137449k
Peak memory use before GGC: 56959k
Peak memory use after GGC: 31385k
Maximum of released memory in single GGC run: 33223k
Garbage: 128387k
Leak: 8355k
Overhead: 14291k
GGC runs: 291
Testing has produced no results
Testing has produced no results
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 138735k -> 138737k
Peak memory use before GGC: 58161k
Peak memory use after GGC: 32586k
Maximum of released memory in single GGC run: 33224k
Garbage: 128896k
Leak: 9933k
Overhead: 14731k
GGC runs: 288
Testing has produced no results
Testing has produced no results
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 142363k -> 142349k
Peak memory use before GGC: 56076k
Peak memory use after GGC: 49743k
Maximum of released memory in single GGC run: 23960k
Garbage: 204998k
Leak: 9261k
Overhead: 24455k
GGC runs: 315
Pre-IPA-Garbage: 50366k
Pre-IPA-Leak: 49269k
Pre-IPA-Overhead: 7416k
Post-IPA-Garbage: 50366k
Post-IPA-Leak: 49269k
Post-IPA-Overhead: 7416k
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 184375k -> 184397k
Peak memory use before GGC: 56658k
Peak memory use after GGC: 51344k
Maximum of released memory in single GGC run: 22852k
Garbage: 246589k
Leak: 10337k
Overhead: 30363k
GGC runs: 345
Pre-IPA-Garbage: 50437k
Pre-IPA-Leak: 49273k
Pre-IPA-Overhead: 7423k
Post-IPA-Garbage: 50437k
Post-IPA-Leak: 49273k
Post-IPA-Overhead: 7423k
comparing insn-attrtab.c compilation at -O3 level:
Overall memory needed: 190875k -> 190877k
Peak memory use before GGC: 68990k
Peak memory use after GGC: 64797k
Maximum of released memory in single GGC run: 24862k
Garbage: 273782k
Leak: 10373k
Overhead: 32269k
GGC runs: 345
Pre-IPA-Garbage: 50437k
Pre-IPA-Leak: 49273k
Pre-IPA-Overhead: 7423k
Post-IPA-Garbage: 50437k
Post-IPA-Leak: 49273k
Post-IPA-Overhead: 7423k
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 144130k
Peak memory use before GGC: 80333k
Peak memory use after GGC: 79538k
Maximum of released memory in single GGC run: 14816k
Garbage: 197265k
Leak: 47151k
Overhead: 24079k
GGC runs: 418
Pre-IPA-Garbage: 107899k
Pre-IPA-Leak: 69071k
Pre-IPA-Overhead: 12017k
Post-IPA-Garbage: 107899k
Post-IPA-Leak: 69071k
Post-IPA-Overhead: 12017k
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 166186k
Peak memory use before GGC: 92917k
Peak memory use after GGC: 91996k
Maximum of released memory in single GGC run: 15518k
Garbage: 202908k
Leak: 71539k
Overhead: 30437k
GGC runs: 389
Pre-IPA-Garbage: 108542k
Pre-IPA-Leak: 83804k
Pre-IPA-Overhead: 15320k
Post-IPA-Garbage: 108542k
Post-IPA-Leak: 83804k
Post-IPA-Overhead: 15320k
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 118971k -> 118973k
Peak memory use before GGC: 79481k
Peak memory use after GGC: 78688k
Maximum of released memory in single GGC run: 14455k
Garbage: 287462k -> 287459k
Leak: 46302k
Overhead: 28531k -> 28530k
GGC runs: 520
Pre-IPA-Garbage: 151112k -> 151111k
Pre-IPA-Leak: 83060k
Pre-IPA-Overhead: 16674k -> 16674k
Post-IPA-Garbage: 151112k -> 151111k
Post-IPA-Leak: 83060k
Post-IPA-Overhead: 16674k -> 16674k
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 121203k -> 121205k
Peak memory use before GGC: 79507k
Peak memory use after GGC: 78720k
Maximum of released memory in single GGC run: 14457k
Garbage: 355648k -> 355433k
Leak: 47706k
Overhead: 35648k -> 35633k
GGC runs: 597
Pre-IPA-Garbage: 152715k -> 152713k
Pre-IPA-Leak: 82937k
Pre-IPA-Overhead: 16810k -> 16810k
Post-IPA-Garbage: 152715k -> 152713k
Post-IPA-Leak: 82937k
Post-IPA-Overhead: 16810k -> 16810k
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 124255k -> 124241k
Peak memory use before GGC: 81000k
Peak memory use after GGC: 80198k
Maximum of released memory in single GGC run: 14780k
Garbage: 382595k -> 382274k
Leak: 48128k -> 48115k
Overhead: 37913k -> 37888k
GGC runs: 620 -> 619
Pre-IPA-Garbage: 155340k -> 155332k
Pre-IPA-Leak: 83221k
Pre-IPA-Overhead: 17052k -> 17051k
Post-IPA-Garbage: 155340k -> 155332k
Post-IPA-Leak: 83221k
Post-IPA-Overhead: 17052k -> 17051k
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 380348k -> 380351k
Peak memory use before GGC: 100958k
Peak memory use after GGC: 56612k
Maximum of released memory in single GGC run: 50582k
Garbage: 178453k
Leak: 6104k
Overhead: 30541k
GGC runs: 106
Testing has produced no results
Testing has produced no results
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 381192k -> 381191k
Peak memory use before GGC: 101651k
Peak memory use after GGC: 57305k
Maximum of released memory in single GGC run: 50582k
Garbage: 178616k
Leak: 8133k
Overhead: 31125k
GGC runs: 111
Testing has produced no results
Testing has produced no results
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 398935k -> 398281k
Peak memory use before GGC: 75052k
Peak memory use after GGC: 68956k
Maximum of released memory in single GGC run: 34950k
Garbage: 237663k
Leak: 13678k
Overhead: 30716k
GGC runs: 106
Pre-IPA-Garbage: 47276k
Pre-IPA-Leak: 65130k
Pre-IPA-Overhead: 6423k
Post-IPA-Garbage: 47276k
Post-IPA-Leak: 65130k
Post-IPA-Overhead: 6423k
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 303263k -> 303265k
Peak memory use before GGC: 74967k
Peak memory use after GGC: 68957k
Maximum of released memory in single GGC run: 31580k
Garbage: 252144k
Leak: 13852k
Overhead: 33834k
GGC runs: 118
Pre-IPA-Garbage: 99281k
Pre-IPA-Leak: 82247k
Pre-IPA-Overhead: 10465k
Post-IPA-Garbage: 99281k
Post-IPA-Leak: 82247k
Post-IPA-Overhead: 10465k
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 1079667k -> 1079665k
Peak memory use before GGC: 141304k
Peak memory use after GGC: 131199k
Maximum of released memory in single GGC run: 55802k
Garbage: 343000k
Leak: 22001k
Overhead: 37524k
GGC runs: 102
Pre-IPA-Garbage: 99281k
Pre-IPA-Leak: 82247k
Pre-IPA-Overhead: 10465k
Post-IPA-Garbage: 99281k
Post-IPA-Leak: 82247k
Post-IPA-Overhead: 10465k
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2008-05-20 14:50:54.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2008-05-20 19:11:33.000000000 +0000
@@ -1,3 +1,41 @@
+2008-05-20 Joseph Myers <joseph@codesourcery.com>
+
+ * doc/install.texi2html: Generate gcc-vers.texi in $DESTDIR not
+ $SOURCEDIR/include.
+
+2008-05-20 Jan Sjodin <jan.sjodin@amd.com>
+ Sebastian Pop <sebastian.pop@amd.com>
+
+ PR tree-optimization/36206
+ * tree-scalar-evolution.c: Remove enum INSERT_SUPERLOOP_CHRECS,
+ FOLD_CONVERSIONS.
+ (instantiate_scev_1): Rename flags to fold_conversions.
+ Do not check for INSERT_SUPERLOOP_CHRECS, keep SSA_NAMEs defined
+ outeside instantiation_loop.
+ * tree-chrec.h (evolution_function_is_affine_in_loop): New.
+ (evolution_function_is_affine_or_constant_p): Removed.
+ * tree-data-ref.c (dr_analyze_indices): Replace resolve_mixers with
+ instantiate_scev.
+ (analyze_siv_subscript): Pass in the loop nest number.
+ Call evolution_function_is_affine_in_loop instead of
+ evolution_function_is_affine_p.
+ (analyze_overlapping_iterations): Pass in the loop nest number.
+
+2008-05-20 Jan Sjodin <jan.sjodin@amd.com>
+ Sebastian Pop <sebastian.pop@amd.com>
+
+ PR tree-optimization/36206
+ * tree-chrec.h (chrec_fold_op): New.
+ * tree-data-ref.c (initialize_matrix_A): Traverse NOP_EXPR, PLUS_EXPR, and
+ other trees.
+
+2008-05-20 Nathan Sidwell <nathan@codesourcery.com>
+
+ * c-incpath.c (INO_T_EQ): Do not define on non-inode systems.
+ (DIRS_EQ): New.
+ (remove_duplicates): Do not set inode on non-inode systems. Use
+ DIRS_EQ.
+
2008-05-20 Sandra Loosemore <sandra@codesourcery.com>
* config.gcc (tm_file): Update comments about relative pathnames.
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.
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