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GCC memory consumption increased by recent patch!
- From: gcctest at suse dot de
- To: jh at suse dot cz, gcc-regression at gcc dot gnu dot org
- Date: Sun, 30 Jan 2005 21:03:48 +0000
- Subject: GCC memory consumption increased by recent patch!
Hi,
Comparing memory consumption on compilation of combine.i and generate-3.4.ii I got:
comparing combine.c compilation at -O0 level:
Overall memory needed: 24633k -> 24637k
Peak memory use before GGC: 9351k
Peak memory use after GGC: 8665k
Maximum of released memory in single GGC run: 2864k
Garbage: 41665k
Leak: 6387k
Overhead: 5772k
GGC runs: 328
comparing combine.c compilation at -O1 level:
Overall memory needed: 25461k -> 25469k
Peak memory use before GGC: 9228k
Peak memory use after GGC: 8733k
Maximum of released memory in single GGC run: 2027k
Garbage: 61218k
Leak: 6749k
Overhead: 9980k
GGC runs: 503
comparing combine.c compilation at -O2 level:
Overall memory needed: 29501k -> 29521k
Peak memory use before GGC: 12663k
Peak memory use after GGC: 12537k
Maximum of released memory in single GGC run: 2551k -> 2550k
Garbage: 79124k -> 79173k
Leak: 6581k -> 6585k
Overhead: 14082k -> 14094k
GGC runs: 515
comparing combine.c compilation at -O3 level:
Overall memory allocated via mmap and sbrk increased from 20180k to 20212k, overall 0.16%
Overall memory needed: 20180k -> 20212k
Peak memory use before GGC: 12793k -> 12794k
Peak memory use after GGC: 12537k
Maximum of released memory in single GGC run: 3348k -> 3345k
Garbage: 106938k -> 106976k
Leak: 7092k -> 7098k
Overhead: 18876k -> 18885k
GGC runs: 581
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 114136k
Peak memory use before GGC: 74739k
Peak memory use after GGC: 45485k
Maximum of released memory in single GGC run: 39340k
Garbage: 152660k
Leak: 10976k
Overhead: 19969k
GGC runs: 273
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 124560k
Peak memory use before GGC: 78748k
Peak memory use after GGC: 70095k
Maximum of released memory in single GGC run: 40765k
Garbage: 367812k
Leak: 11353k
Overhead: 69563k
GGC runs: 399
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 148992k
Peak memory use before GGC: 98349k
Peak memory use after GGC: 83466k
Maximum of released memory in single GGC run: 39290k
Garbage: 481104k -> 481106k
Leak: 11238k -> 11239k
Overhead: 84672k -> 84673k
GGC runs: 341
comparing insn-attrtab.c compilation at -O3 level:
Overall memory allocated via mmap and sbrk increased from 147352k to 148984k, overall 1.11%
Overall memory needed: 147352k -> 148984k
Peak memory use before GGC: 98351k
Peak memory use after GGC: 83467k
Maximum of released memory in single GGC run: 39291k
Garbage: 482146k -> 482150k
Leak: 11276k -> 11277k
Overhead: 84822k -> 84822k
GGC runs: 347
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 111084k
Peak memory use before GGC: 86879k
Peak memory use after GGC: 85930k
Maximum of released memory in single GGC run: 19282k
Garbage: 245831k
Leak: 55490k
Overhead: 43290k
GGC runs: 366
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 103653k -> 103657k
Peak memory use before GGC: 85962k
Peak memory use after GGC: 84927k
Maximum of released memory in single GGC run: 18946k
Garbage: 445668k
Leak: 56770k
Overhead: 65542k
GGC runs: 527
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 104689k -> 104713k
Peak memory use before GGC: 85962k
Peak memory use after GGC: 84927k
Maximum of released memory in single GGC run: 18946k
Garbage: 488445k -> 487718k
Leak: 57399k -> 57395k
Overhead: 75213k -> 75156k
GGC runs: 586 -> 584
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 112397k -> 112409k
Peak memory use before GGC: 92701k
Peak memory use after GGC: 86221k
Maximum of released memory in single GGC run: 19712k
Garbage: 504269k -> 503792k
Leak: 57577k -> 57525k
Overhead: 76897k -> 76868k
GGC runs: 570 -> 568
Head of changelog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2005-01-30 05:33:00.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2005-01-30 20:04:05.000000000 +0000
@@ -1,3 +1,29 @@
+2005-01-30 Richard Henderson <rth@redhat.com>
+
+ * rtl.c (rtx_equal_p): No early exit for CONST_VECTOR.
+ * varasm.c (const_rtx_hash_1): Handle CONST_VECTOR.
+
+2005-01-30 Richard Henderson <rth@redhat.com>
+
+ PR target/19700
+ * config/i386/i386.c (ix86_expand_copysign): New.
+ (ix86_split_copysign_const): New.
+ (ix86_split_copysign_var): Rename from ix86_split_copysign,
+ rearrange op1/nmask operands.
+ * config/i386/i386-protos.h: Update.
+ * config/i386/i386.md (copysignsf3): Use ix86_expand_copysign.
+ (copysigndf3): Likewise.
+ (copysignsf3_const, copysigndf3_const): New.
+ (copysignsf3_var): Rename from copysignsf3, split out splitter
+ and fix split predicate for X constraint.
+ (copysigndf3_var): Similarly.
+
+2005-01-30 Kazu Hirata <kazu@cs.umass.edu>
+
+ * optabs.c, doc/c-tree.texi, doc/install.texi, doc/md.texi,
+ doc/passes.texi, doc/rtl.texi, doc/sourcebuild.texi,
+ doc/tm.texi, doc/tree-ssa.texi: Update copyright.
+
2005-01-29 Richard Henderson <rth@redhat.com>
PR target/19690
I am friendly script caring about memory consumption in GCC. Please contact
jh@suse.cz if something is going wrong.
The results can be reproduced by building 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.
Yours testing script.