GCC memory consumption increased by recent patch!

[gcctest@suse.de]

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: 17820k
    Peak memory use before GGC: 9294k
    Peak memory use after GGC: 8606k
    Maximum of released memory in single GGC run: 2867k
    Garbage: 42475k
    Leak: 6107k
    Overhead: 5590k
    GGC runs: 363

comparing combine.c compilation at -O1 level:
    Overall memory needed: 18540k
    Peak memory use before GGC: 9573k
    Peak memory use after GGC: 8663k
    Maximum of released memory in single GGC run: 2067k
    Garbage: 78747k
    Leak: 6483k
    Overhead: 13868k
    GGC runs: 589

comparing combine.c compilation at -O2 level:
    Overall memory needed: 22076k
    Peak memory use before GGC: 12756k
    Peak memory use after GGC: 12610k
    Maximum of released memory in single GGC run: 2576k
    Garbage: 94713k
    Leak: 6304k
    Overhead: 18777k
    GGC runs: 580

comparing combine.c compilation at -O3 level:
    Overall memory needed: 23972k
    Peak memory use before GGC: 13246k
    Peak memory use after GGC: 12610k
    Maximum of released memory in single GGC run: 3483k
    Garbage: 126026k
    Leak: 6852k
    Overhead: 24652k
    GGC runs: 646

comparing insn-attrtab.c compilation at -O0 level:
    Overall memory needed: 132860k
    Peak memory use before GGC: 76388k
    Peak memory use after GGC: 45185k
    Maximum of released memory in single GGC run: 41417k
    Garbage: 157790k
    Leak: 10620k
    Overhead: 19800k
    GGC runs: 310

comparing insn-attrtab.c compilation at -O1 level:
    Overall memory needed: 151600k
    Peak memory use before GGC: 94307k
    Peak memory use after GGC: 71401k
    Maximum of released memory in single GGC run: 40513k
    Garbage: 474239k
    Leak: 10968k
    Overhead: 84931k
    GGC runs: 461

comparing insn-attrtab.c compilation at -O2 level:
    Overall memory needed: 237408k
    Peak memory use before GGC: 109880k
    Peak memory use after GGC: 86974k
    Maximum of released memory in single GGC run: 35488k
    Garbage: 525180k
    Leak: 11150k
    Overhead: 95096k
    GGC runs: 383

comparing insn-attrtab.c compilation at -O3 level:
    Overall memory needed: 237384k
    Peak memory use before GGC: 109882k
    Peak memory use after GGC: 86975k
    Maximum of released memory in single GGC run: 35488k
    Garbage: 527525k
    Leak: 11223k
    Overhead: 95873k
    GGC runs: 392

comparing Gerald's testcase PR8361 compilation at -O0 level:
    Overall memory needed: 114844k
    Peak memory use before GGC: 92008k
    Peak memory use after GGC: 90475k
    Maximum of released memory in single GGC run: 20896k
    Garbage: 270774k
    Leak: 58324k
    Overhead: 34949k
    GGC runs: 552

comparing Gerald's testcase PR8361 compilation at -O1 level:
    Overall memory needed: 120284k -> 120268k
    Peak memory use before GGC: 96217k
    Peak memory use after GGC: 89741k
    Maximum of released memory in single GGC run: 20047k
    Garbage: 672246k -> 671531k
    Leak: 60665k -> 60666k
    Overhead: 145158k -> 145201k
    GGC runs: 835

comparing Gerald's testcase PR8361 compilation at -O2 level:
  Overall memory allocated via mmap and sbrk increased from 121448k to 121700k, overall 0.21%
  Amount of produced GGC garbage increased from 726805k to 732760k, overall 0.82%
    Overall memory needed: 121448k -> 121700k
    Peak memory use before GGC: 96218k
    Peak memory use after GGC: 89741k
    Maximum of released memory in single GGC run: 20048k
    Garbage: 726805k -> 732760k
    Leak: 61246k -> 61239k
    Overhead: 167636k -> 171766k
    GGC runs: 870 -> 866

comparing Gerald's testcase PR8361 compilation at -O3 level:
  Overall memory allocated via mmap and sbrk increased from 120080k to 120416k, overall 0.28%
  Amount of produced GGC garbage increased from 766821k to 770302k, overall 0.45%
    Overall memory needed: 120080k -> 120416k
    Peak memory use before GGC: 92007k
    Peak memory use after GGC: 90540k
    Maximum of released memory in single GGC run: 20814k
    Garbage: 766821k -> 770302k
    Leak: 61633k -> 61608k
    Overhead: 180906k -> 183436k
    GGC runs: 851

Head of changelog is:

--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog	2004-09-12 21:43:27.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog	2004-09-13 03:37:01.000000000 +0000
@@ -1,3 +1,27 @@
+2004-09-13  Richard Henderson  <rth@redhat.com>
+
+	PR tree-opt/10528
+	* tree-inline.c (copy_body_r): Recompute bits for ADDR_EXPR,
+	after copying its argument.
+
+2004-09-13  Joseph S. Myers  <jsm@polyomino.org.uk>
+
+	* c-common.c, c-decl.c, c-lex.c, c-objc-common.c, c-opts.c,
+	c-parse.in, c-pragma.c, c-typeck.c: Use %q, %< and %> for quoting
+	in diagnostics.  Use %' for English apostrophes.
+	* c-tree.h (ATTRIBUTE_GCC_CDIAG): Define.
+	(pedwarn_c90, pedwarn_c99): Use it.
+	* c-decl.c (lookup_label): Quote label name in diagnostic.
+	* c-parse.in (yyprint): Use ' instead of ` for left quote.
+	* c-typeck.c (warn_for_assignment): Likewise.
+
+2004-09-13  Jan Hubicka  <jh@suse.cz>
+
+	* i386.c (x86_schedule): New global variable.
+	(override_options): Disable scheduling when not supported.
+	* i386.h (x86_schedule): Declare.
+	(TARGET_SCHEDULE): New macro.
+
 2004-09-12  Richard Henderson  <rth@redhat.com>
 
 	PR c++/16254

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.