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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, 16 Jan 2005 18:11:36 +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: 24777k
Peak memory use before GGC: 9345k
Peak memory use after GGC: 8659k
Maximum of released memory in single GGC run: 2864k
Garbage: 41727k
Leak: 6379k
Overhead: 5777k
GGC runs: 329
comparing combine.c compilation at -O1 level:
Overall memory needed: 26213k
Peak memory use before GGC: 9233k
Peak memory use after GGC: 8732k
Maximum of released memory in single GGC run: 2026k
Garbage: 66612k
Leak: 6774k
Overhead: 10525k
GGC runs: 518
comparing combine.c compilation at -O2 level:
Overall memory needed: 29529k
Peak memory use before GGC: 12665k
Peak memory use after GGC: 12540k
Maximum of released memory in single GGC run: 2533k
Garbage: 80588k
Leak: 6600k
Overhead: 14342k
GGC runs: 520
comparing combine.c compilation at -O3 level:
Overall memory needed: 20196k
Peak memory use before GGC: 12919k
Peak memory use after GGC: 12540k
Maximum of released memory in single GGC run: 3347k
Garbage: 109074k
Leak: 7135k
Overhead: 19205k
GGC runs: 585
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 117548k
Peak memory use before GGC: 78061k
Peak memory use after GGC: 45541k
Maximum of released memory in single GGC run: 42606k
Garbage: 159286k
Leak: 10949k
Overhead: 20803k
GGC runs: 274
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 128704k
Peak memory use before GGC: 83579k
Peak memory use after GGC: 69298k
Maximum of released memory in single GGC run: 40617k
Garbage: 441383k
Leak: 11295k
Overhead: 77391k
GGC runs: 406
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 153408k -> 153544k
Peak memory use before GGC: 99340k
Peak memory use after GGC: 84460k
Maximum of released memory in single GGC run: 41525k
Garbage: 487922k
Leak: 11219k
Overhead: 85491k
GGC runs: 342
comparing insn-attrtab.c compilation at -O3 level:
Overall memory allocated via mmap and sbrk increased from 150552k to 152176k, overall 1.08%
Overall memory needed: 150552k -> 152176k
Peak memory use before GGC: 99341k
Peak memory use after GGC: 84462k
Maximum of released memory in single GGC run: 41525k
Garbage: 489113k
Leak: 11261k
Overhead: 85649k
GGC runs: 349
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 111088k
Peak memory use before GGC: 86883k
Peak memory use after GGC: 85932k
Maximum of released memory in single GGC run: 19284k
Garbage: 246367k
Leak: 55491k
Overhead: 43354k
GGC runs: 367
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 104733k
Peak memory use before GGC: 85965k
Peak memory use after GGC: 84929k
Maximum of released memory in single GGC run: 18947k
Garbage: 466109k
Leak: 57238k
Overhead: 67141k
GGC runs: 550
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 104805k
Peak memory use before GGC: 85965k
Peak memory use after GGC: 84929k
Maximum of released memory in single GGC run: 18947k
Garbage: 500465k
Leak: 57818k
Overhead: 76609k
GGC runs: 594
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 101356k
Peak memory use before GGC: 92703k
Peak memory use after GGC: 86223k
Maximum of released memory in single GGC run: 19713k
Garbage: 520396k
Leak: 58142k
Overhead: 78452k
GGC runs: 578
Head of changelog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2005-01-16 02:41:54.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2005-01-16 17:10:20.000000000 +0000
@@ -1,3 +1,18 @@
+2005-01-16 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
+
+ PR target/16304
+ * defaults.h (TARGET_DEFERRED_OUTPUT_DEFS): Provide default.
+ * toplev.c (compile_file): Call process_pending_assemble_output_defs
+ just before targetm.asm_out.file_end.
+ * tree.h (process_pending_assemble_output_defs): Declare.
+ * varasm.c (assemble_output_def, process_pending_assemble_output_defs):
+ New functions.
+ (assemble_alias): Defer generation of assembly code for defines when
+ TARGET_DEFERRED_OUTPUT_DEFS is true.
+ * config/rs6000/aix41.h (TARGET_DEFERRED_OUTPUT_DEFS): Define.
+ * config/rs6000/aix43.h (TARGET_DEFERRED_OUTPUT_DEFS): Define.
+ * doc/tm.texi (TARGET_DEFERRED_OUTPUT_DEFS): document.
+
2005-01-15 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
PR target/19336
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.