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A recent patch increased GCC's memory consumption!
- From: gcctest at suse dot de
- To: jh at suse dot cz, gcc-regression at gcc dot gnu dot org
- Date: Sat, 07 Jul 2007 17:00:51 +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: 8333k -> 8331k
Peak memory use before GGC: 3357k
Peak memory use after GGC: 3021k
Maximum of released memory in single GGC run: 336k
Garbage: 491k
Leak: 3754k
Overhead: 875k
GGC runs: 3
comparing empty function compilation at -O0 -g level:
Overall memory needed: 8349k -> 8347k
Peak memory use before GGC: 3385k
Peak memory use after GGC: 3048k
Maximum of released memory in single GGC run: 337k
Garbage: 493k
Leak: 3787k
Overhead: 879k
GGC runs: 3
comparing empty function compilation at -O1 level:
Overall memory needed: 8369k -> 8359k
Peak memory use before GGC: 3357k
Peak memory use after GGC: 3021k
Maximum of released memory in single GGC run: 336k
Garbage: 496k
Leak: 3757k
Overhead: 875k
GGC runs: 3
comparing empty function compilation at -O2 level:
Overall memory needed: 8397k -> 8383k
Peak memory use before GGC: 3358k
Peak memory use after GGC: 3021k
Maximum of released memory in single GGC run: 337k
Garbage: 500k
Leak: 3757k
Overhead: 876k
GGC runs: 3
comparing empty function compilation at -O3 level:
Overall memory needed: 8397k -> 8383k
Peak memory use before GGC: 3358k
Peak memory use after GGC: 3021k
Maximum of released memory in single GGC run: 337k
Garbage: 500k
Leak: 3757k
Overhead: 876k
GGC runs: 3
comparing combine.c compilation at -O0 level:
Overall memory needed: 23737k -> 23739k
Peak memory use before GGC: 10293k
Peak memory use after GGC: 9510k
Maximum of released memory in single GGC run: 1908k
Garbage: 38898k
Leak: 8672k
Overhead: 5362k
GGC runs: 251
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 25621k -> 25623k
Peak memory use before GGC: 11956k
Peak memory use after GGC: 11301k
Maximum of released memory in single GGC run: 1516k
Garbage: 39207k
Leak: 11565k
Overhead: 6068k
GGC runs: 251
comparing combine.c compilation at -O1 level:
Overall memory needed: 37481k -> 37375k
Peak memory use before GGC: 18941k -> 18939k
Peak memory use after GGC: 18749k
Maximum of released memory in single GGC run: 1374k -> 1372k
Garbage: 53191k -> 52731k
Leak: 8730k -> 8729k
Overhead: 6461k -> 6370k
GGC runs: 326 -> 325
comparing combine.c compilation at -O2 level:
Overall memory needed: 39485k -> 39775k
Peak memory use before GGC: 18994k
Peak memory use after GGC: 18805k -> 18804k
Maximum of released memory in single GGC run: 1399k -> 1400k
Garbage: 72347k -> 72347k
Leak: 8847k -> 8844k
Overhead: 8785k -> 8729k
GGC runs: 390 -> 389
comparing combine.c compilation at -O3 level:
Overall memory allocated via mmap and sbrk increased from 41817k to 44563k, overall 6.57%
Peak amount of GGC memory allocated before garbage collecting increased from 19249k to 19324k, overall 0.39%
Amount of produced GGC garbage increased from 94260k to 95206k, overall 1.00%
Amount of memory still referenced at the end of compilation increased from 8960k to 8970k, overall 0.11%
Overall memory needed: 41817k -> 44563k
Peak memory use before GGC: 19249k -> 19324k
Peak memory use after GGC: 18934k -> 18929k
Maximum of released memory in single GGC run: 2208k -> 2345k
Garbage: 94260k -> 95206k
Leak: 8960k -> 8970k
Overhead: 11499k -> 11592k
GGC runs: 417
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 143321k -> 143323k
Peak memory use before GGC: 61019k
Peak memory use after GGC: 34025k
Maximum of released memory in single GGC run: 34625k
Garbage: 132717k
Leak: 11189k
Overhead: 14754k
GGC runs: 196
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 144569k -> 144575k
Peak memory use before GGC: 62181k
Peak memory use after GGC: 35185k
Maximum of released memory in single GGC run: 34626k
Garbage: 132946k
Leak: 12898k
Overhead: 15151k
GGC runs: 200
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 153745k -> 153523k
Peak memory use before GGC: 59276k -> 58819k
Peak memory use after GGC: 55051k -> 54590k
Maximum of released memory in single GGC run: 23587k -> 23586k
Garbage: 218381k -> 216879k
Leak: 11321k -> 11321k
Overhead: 25147k -> 24851k
GGC runs: 228
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 192301k -> 192199k
Peak memory use before GGC: 59158k -> 58704k
Peak memory use after GGC: 55111k -> 54648k
Maximum of released memory in single GGC run: 21339k
Garbage: 254255k -> 252848k
Leak: 11315k -> 11315k
Overhead: 30795k -> 30514k
GGC runs: 253 -> 252
comparing insn-attrtab.c compilation at -O3 level:
Overall memory needed: 198181k -> 197743k
Peak memory use before GGC: 71558k -> 71096k
Peak memory use after GGC: 65945k -> 65483k
Maximum of released memory in single GGC run: 22950k -> 22953k
Garbage: 283292k -> 281897k
Leak: 11325k -> 11324k
Overhead: 32508k -> 32217k
GGC runs: 256 -> 255
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 156097k -> 156091k
Peak memory use before GGC: 91054k
Peak memory use after GGC: 90152k
Maximum of released memory in single GGC run: 17988k
Garbage: 209581k
Leak: 53737k
Overhead: 24601k
GGC runs: 396
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 177201k -> 177203k
Peak memory use before GGC: 103968k
Peak memory use after GGC: 102938k
Maximum of released memory in single GGC run: 18650k
Garbage: 215425k
Leak: 77165k
Overhead: 30569k
GGC runs: 373
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 153151k -> 152323k
Peak memory use before GGC: 103219k -> 103213k
Peak memory use after GGC: 102155k
Maximum of released memory in single GGC run: 17399k
Garbage: 331698k -> 330033k
Leak: 53859k -> 53851k
Overhead: 30813k -> 30466k
GGC runs: 500 -> 499
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 163203k -> 163879k
Peak memory use before GGC: 103758k -> 103750k
Peak memory use after GGC: 102721k -> 102719k
Maximum of released memory in single GGC run: 17399k
Garbage: 389590k -> 388153k
Leak: 54911k -> 54891k
Overhead: 37517k -> 37212k
GGC runs: 560 -> 557
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 168059k -> 169251k
Peak memory use before GGC: 106114k -> 106103k
Peak memory use after GGC: 105022k
Maximum of released memory in single GGC run: 17712k
Garbage: 433639k -> 432152k
Leak: 55241k -> 55228k
Overhead: 41133k -> 40853k
GGC runs: 584 -> 582
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 387671k
Peak memory use before GGC: 103448k
Peak memory use after GGC: 59101k
Maximum of released memory in single GGC run: 50583k
Garbage: 179419k
Leak: 8939k
Overhead: 31381k
GGC runs: 64
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 388463k
Peak memory use before GGC: 104094k
Peak memory use after GGC: 59748k
Maximum of released memory in single GGC run: 50582k
Garbage: 179523k
Leak: 10707k
Overhead: 31877k
GGC runs: 72
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 308081k -> 311739k
Peak memory use before GGC: 84295k -> 83356k
Peak memory use after GGC: 75947k
Maximum of released memory in single GGC run: 39284k -> 38345k
Garbage: 232360k -> 231076k
Leak: 22376k
Overhead: 31831k -> 31549k
GGC runs: 70 -> 71
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 316053k -> 316095k
Peak memory use before GGC: 80933k
Peak memory use after GGC: 75947k
Maximum of released memory in single GGC run: 33653k -> 32891k
Garbage: 243170k -> 242063k
Leak: 22457k -> 22457k
Overhead: 34350k -> 34089k
GGC runs: 84
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 1965705k -> 1966555k
Peak memory use before GGC: 190538k
Peak memory use after GGC: 178054k
Maximum of released memory in single GGC run: 81025k
Garbage: 389440k
Leak: 47091k
Overhead: 48668k
GGC runs: 65
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2007-07-06 21:46:50.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2007-07-07 14:33:31.000000000 +0000
@@ -1,3 +1,54 @@
+2007-07-07 Kazu Hirata <kazu@codesourcery.com>
+
+ * auto-inc-dec.c, config/arm/arm.c,
+ config/m32r/constraints.md, config/mips/mips.md,
+ config/rs6000/rs6000.c, cselib.c, dce.c, df-core.c,
+ df-problems.c, df-scan.c, df.h, dse.c, gimplify.c,
+ tree-if-conv.c, tree-ssa-sccvn.c, tree-ssa.c: Fix comment
+ typos. Follow spelling conventions.
+ * doc/invoke.texi, doc/rtl.texi: Fix typos.
+
+ * cfgrtl.c (delete_insn_chain_and_edges): Remove.
+ * rtl.h: Remove the prototype for delete_insn_chain_and_edges.
+
+ * tree-ssa-operands.c (realloc_vop, realloc_vdef,
+ realloc_vuse): Remove.
+ * tree-ssa-operands.h: Remove the prototype for realloc_vdef
+ and realloc_vuse.
+
+2007-07-06 Daniel Berlin <dberlin@dberlin.org>
+
+ Fix PR tree-optimization/23488
+
+ * tree-ssa-sccvn.c (expr_has_constants): Handle tcc_declaration.
+ (try_to_simplify): Ditto.
+ (visit_use): Ditto.
+ * tree-vn.c (set_value_handle): Use decl_vh_map for decl value
+ handles.
+ * tree-flow-inline.h (get_value_handle): Ditto.
+ * tree-ssa-pre.c (decl_vh_map): New.
+ (decl_node_pool): New.
+ (can_value_number_operation): Support DECL_P.
+ (can_PRE_operation): Ditto.
+ (create_expression_by_pieces): Ditto.
+ (find_existing_value_expr): Modify to differnetiate between
+ addressing and top level.
+ (create_value_handle_for_expr): Handle DECL's.
+ (poolify_tree): Ditto.
+ (make_values_for_phi): Don't insert into PHI_GEN during FRE.
+ (make_values_for_stmt): Handle DECL's properly.
+ (init_pre): Reorg to not init useless things during FRE.
+ (fini_pre): Ditto.
+ * tree-flow.h: Include pointer-set.h.
+ (decl_vh_map): Declare.
+ * Makefile.in (TREE_FLOW_H): Add pointer-set.h
+
+2007-07-06 Sandra Loosemore <sandra@codesourcery.com>
+
+ * c-opts.c (c_common_handle_option): Make DOLLARS_IN_IDENTIFIERS
+ apply to assembly language, too.
+ * doc/tm.texi (DOLLARS_IN_IDENTIFIERS): Update.
+
2007-07-06 Ian Lance Taylor <iant@google.com>
Zack Weinberg <zackw@panix.com>
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog.cp 2007-07-06 21:46:49.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/cp/ChangeLog 2007-07-07 14:33:27.000000000 +0000
@@ -1,3 +1,10 @@
+2007-07-07 Mark Mitchell <mark@codesourcery.com>
+
+ PR c++/32232
+ * pt.c (resolve_overloaded_unification): Robustify. Return a
+ bool, not an int.
+ (type_unification_real): Adjust accordingly.
+
2007-07-06 Richard Guenther <rguenther@suse.de>
* init.c (build_new_1): Use the correct pointer type.
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.