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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: Fri, 09 Feb 2007 06:26:15 +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: 7382k -> 7383k
Peak memory use before GGC: 2265k
Peak memory use after GGC: 1955k
Maximum of released memory in single GGC run: 310k
Garbage: 445k
Leak: 2289k
Overhead: 456k
GGC runs: 3
comparing empty function compilation at -O0 -g level:
Overall memory needed: 7398k -> 7399k
Peak memory use before GGC: 2293k
Peak memory use after GGC: 1982k
Maximum of released memory in single GGC run: 311k
Garbage: 448k
Leak: 2321k
Overhead: 461k
GGC runs: 3
comparing empty function compilation at -O1 level:
Overall memory needed: 7498k -> 7495k
Peak memory use before GGC: 2265k
Peak memory use after GGC: 1955k
Maximum of released memory in single GGC run: 310k
Garbage: 451k
Leak: 2291k
Overhead: 457k
GGC runs: 4
comparing empty function compilation at -O2 level:
Overall memory needed: 7510k -> 7507k
Peak memory use before GGC: 2266k
Peak memory use after GGC: 1955k
Maximum of released memory in single GGC run: 311k
Garbage: 454k
Leak: 2291k
Overhead: 457k
GGC runs: 4
comparing empty function compilation at -O3 level:
Overall memory needed: 7510k -> 7507k
Peak memory use before GGC: 2266k
Peak memory use after GGC: 1955k
Maximum of released memory in single GGC run: 311k
Garbage: 454k
Leak: 2291k
Overhead: 457k
GGC runs: 4
comparing combine.c compilation at -O0 level:
Overall memory needed: 17730k -> 17731k
Peak memory use before GGC: 9291k
Peak memory use after GGC: 8871k
Maximum of released memory in single GGC run: 2603k
Garbage: 37162k
Leak: 6539k
Overhead: 5024k
GGC runs: 280
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 19822k -> 19823k
Peak memory use before GGC: 10897k
Peak memory use after GGC: 10531k
Maximum of released memory in single GGC run: 2375k
Garbage: 37738k
Leak: 9415k
Overhead: 5727k
GGC runs: 270
comparing combine.c compilation at -O1 level:
Overall memory needed: 35158k -> 35155k
Peak memory use before GGC: 19412k
Peak memory use after GGC: 19206k
Maximum of released memory in single GGC run: 2197k
Garbage: 57381k -> 57374k
Leak: 6562k
Overhead: 6356k -> 6354k
GGC runs: 349
comparing combine.c compilation at -O2 level:
Amount of memory still referenced at the end of compilation increased from 6673k to 6681k, overall 0.12%
Overall memory needed: 37546k -> 37567k
Peak memory use before GGC: 19448k -> 19446k
Peak memory use after GGC: 19245k
Maximum of released memory in single GGC run: 2187k
Garbage: 69083k -> 68818k
Leak: 6673k -> 6681k
Overhead: 7970k -> 7955k
GGC runs: 407 -> 406
comparing combine.c compilation at -O3 level:
Peak amount of GGC memory allocated before garbage collecting increased from 20533k to 20560k, overall 0.13%
Overall memory needed: 45630k -> 45623k
Peak memory use before GGC: 20533k -> 20560k
Peak memory use after GGC: 19744k
Maximum of released memory in single GGC run: 3125k
Garbage: 102970k -> 102695k
Leak: 6817k
Overhead: 12400k -> 12395k
GGC runs: 458 -> 456
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 103546k -> 103547k
Peak memory use before GGC: 69329k
Peak memory use after GGC: 44976k
Maximum of released memory in single GGC run: 36886k
Garbage: 130571k
Leak: 9588k
Overhead: 16932k
GGC runs: 206
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 105066k -> 105067k
Peak memory use before GGC: 70490k
Peak memory use after GGC: 46244k
Maximum of released memory in single GGC run: 36886k
Garbage: 131730k
Leak: 11278k
Overhead: 17326k
GGC runs: 206
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 148174k -> 146167k
Peak memory use before GGC: 86337k
Peak memory use after GGC: 80543k
Maximum of released memory in single GGC run: 33045k
Garbage: 264606k -> 264605k
Leak: 9404k
Overhead: 27590k -> 27590k
GGC runs: 225
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 193002k -> 191635k
Peak memory use before GGC: 87648k
Peak memory use after GGC: 80609k
Maximum of released memory in single GGC run: 31388k
Garbage: 299523k -> 299515k
Leak: 9401k
Overhead: 33192k -> 33192k
GGC runs: 245
comparing insn-attrtab.c compilation at -O3 level:
Overall memory needed: 191658k -> 191655k
Peak memory use before GGC: 87665k
Peak memory use after GGC: 80626k
Maximum of released memory in single GGC run: 31450k
Garbage: 300159k -> 300153k
Leak: 9407k
Overhead: 33388k -> 33388k
GGC runs: 245
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 151175k -> 151184k
Peak memory use before GGC: 92317k
Peak memory use after GGC: 91394k
Maximum of released memory in single GGC run: 18793k
Garbage: 210317k
Leak: 49389k
Overhead: 23720k
GGC runs: 411
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 169367k -> 169352k
Peak memory use before GGC: 104950k
Peak memory use after GGC: 103910k
Maximum of released memory in single GGC run: 18979k
Garbage: 216936k
Leak: 72814k
Overhead: 29643k
GGC runs: 382
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 145071k -> 145031k
Peak memory use before GGC: 103061k -> 103088k
Peak memory use after GGC: 102031k -> 102050k
Maximum of released memory in single GGC run: 17981k
Garbage: 392060k -> 392073k
Leak: 50219k -> 50219k
Overhead: 34379k -> 34383k
GGC runs: 541
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 146103k -> 146127k
Peak memory use before GGC: 103490k -> 103514k
Peak memory use after GGC: 102465k -> 102485k
Maximum of released memory in single GGC run: 17979k
Garbage: 431339k -> 431219k
Leak: 50909k
Overhead: 39623k -> 39623k
GGC runs: 592
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 148967k -> 148999k
Peak memory use before GGC: 104751k -> 104781k
Peak memory use after GGC: 103682k -> 103711k
Maximum of released memory in single GGC run: 18300k
Garbage: 451263k -> 450979k
Leak: 50997k -> 51004k
Overhead: 41457k -> 41437k
GGC runs: 607
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 246993k -> 246990k
Peak memory use before GGC: 82632k
Peak memory use after GGC: 59514k
Maximum of released memory in single GGC run: 45585k
Garbage: 147214k
Leak: 8082k
Overhead: 24807k
GGC runs: 80
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 247849k -> 247850k
Peak memory use before GGC: 83278k
Peak memory use after GGC: 60160k
Maximum of released memory in single GGC run: 45230k
Garbage: 147433k
Leak: 9338k
Overhead: 25303k
GGC runs: 88
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 258734k -> 258683k
Peak memory use before GGC: 104566k -> 104513k
Peak memory use after GGC: 101352k -> 101299k
Maximum of released memory in single GGC run: 51848k -> 51827k
Garbage: 240888k -> 240867k
Leak: 25176k
Overhead: 29476k -> 29476k
GGC runs: 79
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 531882k -> 531999k
Peak memory use before GGC: 104556k -> 104503k
Peak memory use after GGC: 101342k -> 101289k
Maximum of released memory in single GGC run: 37192k -> 37171k
Garbage: 272729k -> 272708k
Leak: 25605k
Overhead: 35516k -> 35515k
GGC runs: 91
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 1182430k -> 1181215k
Peak memory use before GGC: 200610k
Peak memory use after GGC: 188951k
Maximum of released memory in single GGC run: 80735k
Garbage: 371841k -> 371820k
Leak: 45260k -> 45260k
Overhead: 48290k -> 48290k
GGC runs: 70
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2007-02-07 22:02:52.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2007-02-09 04:41:43.000000000 +0000
@@ -1,3 +1,94 @@
+2007-02-09 Joseph Myers <joseph@codesourcery.com>
+
+ * calls.c (store_one_arg): Pass correct alignment to
+ emit_push_insn for non-BLKmode values.
+ * expr.c (emit_push_insn): If STRICT_ALIGNMENT, copy to an
+ unaligned stack slot via a suitably aligned slot.
+
+2007-02-08 DJ Delorie <dj@redhat.com>
+
+ * config/m32c/m32c.c (m32c_unpend_compare): Add default to silence
+ warnings.
+ (legal_subregs): Use unsigned char, make const.
+ (m32c_illegal_subreg_p): Use ARRAY_SIZE. Delete unused variables.
+
+2007-02-08 Paul Brook <paul@codesourcery.com>
+
+ * config/arm/lib1funcs.asm (RETLDM): Pop directly into PC when no
+ special interworking needed.
+
+2007-02-08 Harsha Jagasia <harsha.jagasia@amd.com>
+
+ * config/i386/xmmintrin.h: Make inclusion of emmintrin.h
+ conditional to __SSE2__.
+ (Entries below should have been added to first ChangeLog
+ entry for amdfam10 dated 2007-02-05)
+ * config/i386/emmintrin.h: Generate #error if __SSE2__ is not
+ defined.
+ * config/i386/pmmintrin.h: Generate #error if __SSE3__ is not
+ defined.
+ * config/i386/tmmintrin.h: Generate #error if __SSSE3__ is not
+ defined.
+
+2007-02-08 DJ Delorie <dj@redhat.com>
+
+ * config/m32c/m32c-protos.h (m32c_illegal_subreg_p): New.
+ * config/m32c/m32c.c (legal_subregs): New.
+ (m32c_illegal_subreg_p): New.
+ * config/m32c/predicates.md (m32c_any_operand): Use it to reject
+ unsupported subregs of hard regs.
+
+2007-02-08 Jan Hubicka <jh@suse.cz>
+
+ * tree-cfg.c (bsi_replace): Shortcut when replacing the statement with
+ the same one; always update histograms.
+
+2007-02-08 Diego Novillo <dnovillo@redhat.com>
+
+ * passes.c (init_optimization_passes): Tidy comment.
+
+2007-02-08 Roger Sayle <roger@eyesopen.com>
+
+ * simplify-rtx.c (simplify_unary_operation_1) <POPCOUNT>: We can
+ strip zero_extend, bswap and rotates from POCOUNT's argument.
+ <PARITY>: Likewise, we can strip not, bswap, sign_extend,
+ zero_extend and rotates from PARITY's argument.
+ <BSWAP>: A byte-swap followed by a byte-swap is an identity.
+ (simplify_const_unary_operation) <BSWAP>: Evaluate the byte-swap
+ of an integer constant at compile-time.
+
+2007-02-08 Diego Novillo <dnovillo@redhat.com>
+
+ PR 30562
+ * tree-flow.h (struct var_ann_d): Remove field 'is_used'.
+ Update all users.
+ * tree-ssa-alias.c (compute_is_aliased): Remove. Update all
+ users.
+ (init_alias_info):
+ * tree-ssa-live.c (remove_unused_locals): Do not remove
+ TREE_ADDRESSABLE variables.
+ * tree-ssa-structalias.c (compute_points_to_sets): Tidy.
+ * tree-ssa-operands.c (add_virtual_operand): Remove argument
+ FOR_CLOBBER. Update all users.
+ If VAR has an associated alias set, add a virtual operand for
+ it if no alias is found to conflict with the memory reference.
+
+2007-02-07 Jan Hubicka <jh@suse.cz>
+ Robert Kidd <rkidd@crhc.uiuc.edu>
+
+ * value-prof.c (visit_hist, free_hist): Return 1 instead of 0.
+
+2007-02-07 Ian Lance Taylor <iant@google.com>
+
+ * lower-subreg.c (simple_move): Reject PARTIAL_INT modes.
+
+2007-02-07 Roger Sayle <roger@eyesopen.com>
+
+ * config/rs6000/rs6000.md (ctz<mode>2, ffs<mode>2, popcount<mode>2,
+ parity<mode>2, smulsi3_highpart, abstf2_internal, allocate_stack,
+ tablejumpdi, movsi_to_cr_one): Remove constraints from
+ define_expand's match_operands.
+
2007-02-07 Roger Sayle <roger@eyesopen.com>
* global.c (compute_regsets): Move declatation of "i" inside of
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.