A recent patch decreased GCC's memory consumption.
gcctest@suse.de
gcctest@suse.de
Thu Dec 14 20:38:00 GMT 2006
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: 18277k
Peak memory use before GGC: 2235k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 293k
Garbage: 423k
Leak: 2273k
Overhead: 446k
GGC runs: 3
comparing empty function compilation at -O0 -g level:
Overall memory needed: 18293k
Peak memory use before GGC: 2263k
Peak memory use after GGC: 1970k
Maximum of released memory in single GGC run: 293k
Garbage: 425k
Leak: 2305k
Overhead: 450k
GGC runs: 3
comparing empty function compilation at -O1 level:
Overall memory needed: 18377k -> 18381k
Peak memory use before GGC: 2235k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 293k
Garbage: 427k
Leak: 2275k
Overhead: 446k
GGC runs: 4
comparing empty function compilation at -O2 level:
Overall memory needed: 18389k -> 18393k
Peak memory use before GGC: 2236k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 294k
Garbage: 430k
Leak: 2275k
Overhead: 447k
GGC runs: 4
comparing empty function compilation at -O3 level:
Overall memory needed: 18389k -> 18393k
Peak memory use before GGC: 2236k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 294k
Garbage: 430k
Leak: 2275k
Overhead: 447k
GGC runs: 4
comparing combine.c compilation at -O0 level:
Overall memory needed: 28437k
Peak memory use before GGC: 9287k
Peak memory use after GGC: 8804k
Maximum of released memory in single GGC run: 2641k
Garbage: 37502k
Leak: 6455k
Overhead: 4869k
GGC runs: 280
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 30521k
Peak memory use before GGC: 10834k
Peak memory use after GGC: 10464k
Maximum of released memory in single GGC run: 2360k
Garbage: 38077k
Leak: 9331k
Overhead: 5570k
GGC runs: 272
comparing combine.c compilation at -O1 level:
Overall memory needed: 29474k
Peak memory use before GGC: 16979k
Peak memory use after GGC: 16792k
Maximum of released memory in single GGC run: 2254k
Garbage: 55685k
Leak: 6489k
Overhead: 10562k
GGC runs: 360
comparing combine.c compilation at -O2 level:
Overall memory needed: 29474k
Peak memory use before GGC: 16988k
Peak memory use after GGC: 16792k
Maximum of released memory in single GGC run: 2611k
Garbage: 71699k
Leak: 6611k
Overhead: 12536k
GGC runs: 413
comparing combine.c compilation at -O3 level:
Overall memory needed: 29602k
Peak memory use before GGC: 18226k
Peak memory use after GGC: 17749k
Maximum of released memory in single GGC run: 4564k
Garbage: 106169k
Leak: 6688k
Overhead: 17998k
GGC runs: 463
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 89650k
Peak memory use before GGC: 71193k
Peak memory use after GGC: 44699k
Maximum of released memory in single GGC run: 37868k
Garbage: 132105k
Leak: 9518k
Overhead: 16952k
GGC runs: 211
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 90826k
Peak memory use before GGC: 72354k
Peak memory use after GGC: 45967k
Maximum of released memory in single GGC run: 37868k
Garbage: 133512k
Leak: 10982k
Overhead: 17347k
GGC runs: 209
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 96050k
Peak memory use before GGC: 73119k
Peak memory use after GGC: 70764k
Maximum of released memory in single GGC run: 31671k
Garbage: 229861k
Leak: 9343k
Overhead: 31154k
GGC runs: 226
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 128386k
Peak memory use before GGC: 78731k
Peak memory use after GGC: 76200k
Maximum of released memory in single GGC run: 30216k
Garbage: 282674k
Leak: 9345k
Overhead: 37707k
GGC runs: 247
comparing insn-attrtab.c compilation at -O3 level:
Ovarall memory allocated via mmap and sbrk decreased from 128162k to 118790k, overall -7.89%
Overall memory needed: 128162k -> 118790k
Peak memory use before GGC: 78756k
Peak memory use after GGC: 76226k
Maximum of released memory in single GGC run: 30410k
Garbage: 283518k
Leak: 9350k
Overhead: 37940k
GGC runs: 253
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 119066k
Peak memory use before GGC: 92331k
Peak memory use after GGC: 91417k
Maximum of released memory in single GGC run: 19252k
Garbage: 210224k
Leak: 48133k
Overhead: 20979k
GGC runs: 413
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 131642k
Peak memory use before GGC: 104696k
Peak memory use after GGC: 103652k
Maximum of released memory in single GGC run: 18947k
Garbage: 216791k
Leak: 71564k
Overhead: 26883k
GGC runs: 384
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 120074k
Peak memory use before GGC: 96747k
Peak memory use after GGC: 94461k
Maximum of released memory in single GGC run: 17941k
Garbage: 442053k
Leak: 50198k
Overhead: 107726k
GGC runs: 565
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 120134k
Peak memory use before GGC: 96775k
Peak memory use after GGC: 94489k
Maximum of released memory in single GGC run: 18082k
Garbage: 497118k
Leak: 51167k
Overhead: 63569k
GGC runs: 621
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 121934k
Peak memory use before GGC: 97763k
Peak memory use after GGC: 96142k
Maximum of released memory in single GGC run: 18476k
Garbage: 517485k
Leak: 51140k
Overhead: 63491k
GGC runs: 625
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 137646k -> 137302k
Peak memory use before GGC: 81587k
Peak memory use after GGC: 58467k
Maximum of released memory in single GGC run: 45167k
Garbage: 148513k
Leak: 7542k
Overhead: 25327k
GGC runs: 82
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 138014k
Peak memory use before GGC: 82233k
Peak memory use after GGC: 59113k
Maximum of released memory in single GGC run: 45232k
Garbage: 148724k
Leak: 9309k
Overhead: 25823k
GGC runs: 88
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 426618k -> 428682k
Peak memory use before GGC: 205546k
Peak memory use after GGC: 199777k
Maximum of released memory in single GGC run: 99746k
Garbage: 283522k
Leak: 29778k
Overhead: 36217k
GGC runs: 97
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 355578k
Peak memory use before GGC: 205539k
Peak memory use after GGC: 199770k
Maximum of released memory in single GGC run: 96117k
Garbage: 364129k
Leak: 30361k
Overhead: 51967k
GGC runs: 105
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 769722k -> 769814k
Peak memory use before GGC: 326891k
Peak memory use after GGC: 304533k
Maximum of released memory in single GGC run: 168269k
Garbage: 504162k
Leak: 45414k
Overhead: 66989k
GGC runs: 97
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2006-12-14 02:18:19.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2006-12-14 18:37:12.000000000 +0000
@@ -1,3 +1,52 @@
+2006-12-14 Jan Hubicka <jh@suse.cz>
+
+ * tree-flow.h (struct stmt_ann_d): Move bitfield references_memory
+ to proper place.
+
+2006-12-14 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/30197
+ * builtins.c (fold_builtin_cexp): New function to fold cexp
+ to cexpi and exp parts.
+ * tree-ssa-pre.c (try_combine_conversion): Also handle
+ REALPART_EXPR and IMAGPART_EXPR.
+
+2006-12-14 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/30172
+ * fold-const.c (fold_binary): Fold __complex__ ( x, 0 )
+ + __complex__ ( 0, y ) to __complex__ ( x, y ).
+ Fold __complex__ (x, y) * +-I to __complex__ (-+y, +-x).
+
+2006-12-14 Richard Guenther <rguenther@suse.de>
+
+ PR tree-optimization/30198
+ * fold-const.c (fold_unary): Fold REALPART_EXPR of cexpi to cos.
+ Fold IMAGPART_EXPR of cexpi to sin.
+
+2006-12-14 Dorit Nuzman <dorit@il.ibm.com>
+ Trevor Smigiel <trevor_smigiel@playstation.sony.com>
+
+ * spu.c (TARGET_VECTORIZE_BUILTIN_MASK_FOR_LOAD): Defined.
+ (spu_init_builtins): Mark the SPU_MASK_FOR_LOAD builtin decl as read
+ only.
+ (spu_expand_builtin_1): Handle the SPU_MASK_FOR_LOAD builtin.
+ (spu_builtin_mask_for_load): New.
+ * spu-builtins.def (SPU_MASK_FOR_LOAD): Define new builtin.
+ * spu.md (UNSPEC_SPU_REALIGN_LOAD, UNSPEC_SPU_MASK_FOR_LOAD):New.
+ (vec_realign_load_<mode>, spu_lvsr): New.
+
+2006-12-13 Ian Lance Taylor <iant@google.com>
+
+ PR c++/19564
+ PR c++/19756
+ * c-typeck.c (parser_build_binary_op): Move parentheses warnings
+ to warn_about_parentheses in c-common.c.
+ * c-common.c (warn_about_parentheses): New function.
+ * c-common.h (warn_about_parentheses): Declare.
+ * doc/invoke.texi (Warning Options): Update -Wparentheses
+ description.
+
2006-12-13 Zdenek Dvorak <dvorakz@suse.cz>
* tree-ssa-loop-ivopts.c: Include tree-affine.h.
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog.cp 2006-12-12 11:12:04.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/cp/ChangeLog 2006-12-14 18:37:11.000000000 +0000
@@ -1,3 +1,19 @@
+2006-12-13 Ian Lance Taylor <iant@google.com>
+
+ PR c++/19564
+ PR c++/19756
+ * parser.c (cp_parser_expression_stack_entry): Add field
+ lhs_type.
+ (cp_parser_binary_expression): Track tree code of left hand side
+ of expression. Use it when calling build_x_binary_op.
+ (cp_parser_selection_statement): Add if_p parameter. Change all
+ callers. Warn about ambiguous else.
+ (cp_parser_statement): Add if_p parameter. Change all callers.
+ (cp_parser_implicitly_scoped_statement): Likewise.
+ * typeck.c (build_x_binary_op): Add parameters arg1_code and
+ arg2_code. Change all callers. Call warn_about_parentheses.
+ * cp-tree.h (build_x_binary_op): Update declaration.
+
2006-12-12 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
* decl.c (build_enumerator): Update error message to match C
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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