A recent patch increased GCC's memory consumption!
gcctest@suse.de
gcctest@suse.de
Thu Jan 10 07:53:00 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: 8151k
Peak memory use before GGC: 1096k
Peak memory use after GGC: 994k
Maximum of released memory in single GGC run: 129k
Garbage: 237k
Leak: 951k
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: 8167k
Peak memory use before GGC: 1123k
Peak memory use after GGC: 1021k
Maximum of released memory in single GGC run: 131k
Garbage: 239k
Leak: 984k
Overhead: 84k
GGC runs: 3
Testing has produced no results
Testing has produced no results
comparing empty function compilation at -O1 level:
Overall memory needed: 8211k
Peak memory use before GGC: 1096k
Peak memory use after GGC: 994k
Maximum of released memory in single GGC run: 131k
Garbage: 239k
Leak: 952k
Overhead: 81k
GGC runs: 2
Pre-IPA-Garbage: 226k
Pre-IPA-Leak: 954k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 226k
Post-IPA-Leak: 954k
Post-IPA-Overhead: 79k
comparing empty function compilation at -O2 level:
Overall memory needed: 8231k
Peak memory use before GGC: 1096k
Peak memory use after GGC: 994k
Maximum of released memory in single GGC run: 134k
Garbage: 243k
Leak: 953k
Overhead: 81k
GGC runs: 2
Pre-IPA-Garbage: 226k
Pre-IPA-Leak: 955k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 226k
Post-IPA-Leak: 955k
Post-IPA-Overhead: 79k
comparing empty function compilation at -O3 level:
Overall memory needed: 8231k
Peak memory use before GGC: 1096k
Peak memory use after GGC: 994k
Maximum of released memory in single GGC run: 134k
Garbage: 243k
Leak: 953k
Overhead: 81k
GGC runs: 2
Pre-IPA-Garbage: 226k
Pre-IPA-Leak: 955k
Pre-IPA-Overhead: 79k
Post-IPA-Garbage: 226k
Post-IPA-Leak: 955k
Post-IPA-Overhead: 79k
comparing combine.c compilation at -O0 level:
Overall memory needed: 22699k -> 22695k
Peak memory use before GGC: 7809k
Peak memory use after GGC: 7186k
Maximum of released memory in single GGC run: 1550k
Garbage: 37949k
Leak: 5506k
Overhead: 4649k
GGC runs: 371
Testing has produced no results
Testing has produced no results
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 24699k
Peak memory use before GGC: 9648k
Peak memory use after GGC: 8954k
Maximum of released memory in single GGC run: 1838k
Garbage: 38291k
Leak: 8320k
Overhead: 5276k
GGC runs: 342
Testing has produced no results
Testing has produced no results
comparing combine.c compilation at -O1 level:
Overall memory needed: 33147k -> 33143k
Peak memory use before GGC: 16345k
Peak memory use after GGC: 16161k
Maximum of released memory in single GGC run: 1362k
Garbage: 51471k
Leak: 5660k
Overhead: 5782k
GGC runs: 443
Pre-IPA-Garbage: 13923k
Pre-IPA-Leak: 17182k
Pre-IPA-Overhead: 2129k
Post-IPA-Garbage: 13923k
Post-IPA-Leak: 17182k
Post-IPA-Overhead: 2129k
comparing combine.c compilation at -O2 level:
Overall memory needed: 36047k
Peak memory use before GGC: 16446k
Peak memory use after GGC: 16280k
Maximum of released memory in single GGC run: 1316k
Garbage: 71101k
Leak: 5990k
Overhead: 8058k
GGC runs: 512
Pre-IPA-Garbage: 14080k
Pre-IPA-Leak: 17247k
Pre-IPA-Overhead: 2144k
Post-IPA-Garbage: 14080k
Post-IPA-Leak: 17247k
Post-IPA-Overhead: 2144k
comparing combine.c compilation at -O3 level:
Overall memory needed: 39395k -> 39399k
Peak memory use before GGC: 16626k
Peak memory use after GGC: 16301k
Maximum of released memory in single GGC run: 2063k
Garbage: 93081k
Leak: 6110k
Overhead: 10677k
GGC runs: 546
Pre-IPA-Garbage: 14086k
Pre-IPA-Leak: 17267k
Pre-IPA-Overhead: 2146k
Post-IPA-Garbage: 14086k
Post-IPA-Leak: 17267k
Post-IPA-Overhead: 2146k
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 137439k
Peak memory use before GGC: 56999k
Peak memory use after GGC: 31456k
Maximum of released memory in single GGC run: 33256k
Garbage: 128624k
Leak: 8382k
Overhead: 14368k
GGC runs: 293
Testing has produced no results
Testing has produced no results
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 138695k
Peak memory use before GGC: 58141k
Peak memory use after GGC: 32598k
Maximum of released memory in single GGC run: 33256k
Garbage: 128840k
Leak: 10042k
Overhead: 14724k
GGC runs: 289
Testing has produced no results
Testing has produced no results
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 144819k -> 144827k
Peak memory use before GGC: 56211k
Peak memory use after GGC: 49983k
Maximum of released memory in single GGC run: 23976k
Garbage: 206434k
Leak: 9275k
Overhead: 24742k
GGC runs: 315
Pre-IPA-Garbage: 50355k
Pre-IPA-Leak: 49676k
Pre-IPA-Overhead: 7543k
Post-IPA-Garbage: 50355k
Post-IPA-Leak: 49676k
Post-IPA-Overhead: 7543k
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 188087k
Peak memory use before GGC: 56850k
Peak memory use after GGC: 51570k
Maximum of released memory in single GGC run: 22733k
Garbage: 246656k
Leak: 10362k
Overhead: 30349k
GGC runs: 346
Pre-IPA-Garbage: 50427k
Pre-IPA-Leak: 49680k
Pre-IPA-Overhead: 7550k
Post-IPA-Garbage: 50427k
Post-IPA-Leak: 49680k
Post-IPA-Overhead: 7550k
comparing insn-attrtab.c compilation at -O3 level:
Overall memory needed: 192847k -> 192879k
Peak memory use before GGC: 68033k
Peak memory use after GGC: 62277k
Maximum of released memory in single GGC run: 23238k
Garbage: 274564k
Leak: 10399k
Overhead: 32145k
GGC runs: 348
Pre-IPA-Garbage: 50427k
Pre-IPA-Leak: 49680k
Pre-IPA-Overhead: 7550k
Post-IPA-Garbage: 50427k
Post-IPA-Leak: 49680k
Post-IPA-Overhead: 7550k
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 149489k
Peak memory use before GGC: 84849k
Peak memory use after GGC: 84008k
Maximum of released memory in single GGC run: 17149k
Garbage: 201070k
Leak: 48173k
Overhead: 24080k
GGC runs: 417
Pre-IPA-Garbage: 109656k
Pre-IPA-Leak: 71361k
Pre-IPA-Overhead: 12151k
Post-IPA-Garbage: 109656k
Post-IPA-Leak: 71361k
Post-IPA-Overhead: 12151k
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 168857k -> 168853k
Peak memory use before GGC: 96061k
Peak memory use after GGC: 95110k
Maximum of released memory in single GGC run: 17205k
Garbage: 206567k
Leak: 69786k
Overhead: 29065k
GGC runs: 391
Pre-IPA-Garbage: 110300k
Pre-IPA-Leak: 84641k
Pre-IPA-Overhead: 14727k
Post-IPA-Garbage: 110300k
Post-IPA-Leak: 84641k
Post-IPA-Overhead: 14727k
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 123587k -> 123588k
Peak memory use before GGC: 84527k
Peak memory use after GGC: 83680k
Maximum of released memory in single GGC run: 16324k
Garbage: 292123k -> 292112k
Leak: 47432k -> 47432k
Overhead: 29531k -> 29530k
GGC runs: 516
Pre-IPA-Garbage: 155083k
Pre-IPA-Leak: 88340k
Pre-IPA-Overhead: 17592k
Post-IPA-Garbage: 155083k
Post-IPA-Leak: 88340k
Post-IPA-Overhead: 17592k
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 126591k -> 126728k
Peak memory use before GGC: 84750k
Peak memory use after GGC: 83909k
Maximum of released memory in single GGC run: 16363k
Garbage: 362881k -> 363083k
Leak: 48359k -> 48358k
Overhead: 36797k -> 36821k
GGC runs: 591
Pre-IPA-Garbage: 158351k
Pre-IPA-Leak: 88468k
Pre-IPA-Overhead: 17939k
Post-IPA-Garbage: 158351k
Post-IPA-Leak: 88468k
Post-IPA-Overhead: 17939k
comparing Gerald's testcase PR8361 compilation at -O3 level:
Amount of memory still referenced at the end of compilation increased from 48887k to 48973k, overall 0.17%
Overall memory needed: 131747k -> 131228k
Peak memory use before GGC: 85944k
Peak memory use after GGC: 85091k
Maximum of released memory in single GGC run: 16721k
Garbage: 394074k -> 393714k
Leak: 48887k -> 48973k
Overhead: 39371k -> 39332k
GGC runs: 623 -> 626
Pre-IPA-Garbage: 161152k
Pre-IPA-Leak: 88748k -> 88748k
Pre-IPA-Overhead: 18193k -> 18193k
Post-IPA-Garbage: 161152k
Post-IPA-Leak: 88748k -> 88748k
Post-IPA-Overhead: 18193k -> 18193k
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 380112k
Peak memory use before GGC: 101209k
Peak memory use after GGC: 56862k
Maximum of released memory in single GGC run: 50583k
Garbage: 178951k
Leak: 6098k
Overhead: 30783k
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: 380908k
Peak memory use before GGC: 101839k
Peak memory use after GGC: 57493k
Maximum of released memory in single GGC run: 50582k
Garbage: 179056k
Leak: 7800k
Overhead: 31215k
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: 441151k -> 437359k
Peak memory use before GGC: 78857k
Peak memory use after GGC: 70436k
Maximum of released memory in single GGC run: 37753k
Garbage: 234534k
Leak: 16073k
Overhead: 35581k
GGC runs: 105
Pre-IPA-Garbage: 52924k
Pre-IPA-Leak: 49245k
Pre-IPA-Overhead: 7121k
Post-IPA-Garbage: 52924k
Post-IPA-Leak: 49245k
Post-IPA-Overhead: 7121k
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 359315k -> 359571k
Peak memory use before GGC: 75423k
Peak memory use after GGC: 70437k
Maximum of released memory in single GGC run: 32245k
Garbage: 245314k
Leak: 16245k
Overhead: 38767k
GGC runs: 116
Pre-IPA-Garbage: 91836k
Pre-IPA-Leak: 77290k
Pre-IPA-Overhead: 11793k
Post-IPA-Garbage: 91836k
Post-IPA-Leak: 77290k
Post-IPA-Overhead: 11793k
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 1313899k
Peak memory use before GGC: 136584k
Peak memory use after GGC: 127942k
Maximum of released memory in single GGC run: 59911k
Garbage: 371518k
Leak: 24376k
Overhead: 49888k
GGC runs: 103
Pre-IPA-Garbage: 91836k
Pre-IPA-Leak: 77290k
Pre-IPA-Overhead: 11793k
Post-IPA-Garbage: 91836k
Post-IPA-Leak: 77290k
Post-IPA-Overhead: 11793k
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2008-01-09 09:15:28.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2008-01-10 03:08:43.000000000 +0000
@@ -1,3 +1,46 @@
+2008-01-09 Sebastian Pop <sebastian.pop@amd.com>
+
+ PR tree-optimization/34017
+ * lambda-code.c (lambda_loopnest_to_gcc_loopnest): Generate code
+ also for PHI_NODE expressions.
+
+2008-01-09 Jan Hubicka <jh@suse.cz>
+
+ PR tree-optimization/34708
+ * tree-inline.c (estimate_num_insns_1): Compute cost of SWITCH_EXPR
+ based on number of case labels.
+ (init_inline_once): Remove switch_cost.
+ * tree-inline.h (eni_weights_d): Remove switch_cost.
+
+2008-01-09 Richard Guenther <rguenther@suse.de>
+ Andrew Pinski <andrew_pinski@playstation.sony.com>
+
+ PR middle-end/30132
+ * gimplify.c (gimplify_cond_expr): Do not create an addressable
+ temporary if an rvalue is ok or an lvalue is not required.
+
+2008-01-09 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/34458
+ * tree-data-ref.c (initialize_matrix_A): Use tree_low_cst,
+ adjust return type.
+
+2008-01-09 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/34679
+ * tree.c (host_integerp): Check for sizetype only if the
+ type is an integer type.
+
+2008-01-09 Steven Bosscher <stevenb.gcc@gmail.com>
+
+ PR debug/26364
+ * opts.c (decode_options): Disable inlining of functions called
+ once if not in unit-at-a-time mode.
+
+2008-01-09 Alexandre Oliva <aoliva@redhat.com>
+
+ * Makefile.in (dse.o): Remove duplicate $(RECOG_H) dependency.
+
2008-01-08 Richard Guenther <rguenther@suse.de>
PR middle-end/31863
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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