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GCC memory consumption decreased by recent patch
- From: gcctest at suse dot de
- To: jh at suse dot cz, gcc-regression at gcc dot gnu dot org
- Date: Mon, 07 Feb 2005 11:04:01 +0000
- Subject: GCC memory consumption decreased 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: 24649k -> 24645k
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: 25485k -> 25489k
Peak memory use before GGC: 9224k
Peak memory use after GGC: 8733k
Maximum of released memory in single GGC run: 2027k
Garbage: 61170k
Leak: 6749k
Overhead: 9978k
GGC runs: 503
comparing combine.c compilation at -O2 level:
Overall memory needed: 29549k
Peak memory use before GGC: 12663k
Peak memory use after GGC: 12537k
Maximum of released memory in single GGC run: 2597k
Garbage: 79387k
Leak: 6585k
Overhead: 14118k
GGC runs: 516
comparing combine.c compilation at -O3 level:
Overall memory needed: 20228k
Peak memory use before GGC: 12795k
Peak memory use after GGC: 12537k
Maximum of released memory in single GGC run: 3406k
Garbage: 107335k
Leak: 7110k
Overhead: 18947k
GGC runs: 582
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: 124276k -> 124368k
Peak memory use before GGC: 78748k
Peak memory use after GGC: 70095k
Maximum of released memory in single GGC run: 40779k
Garbage: 366122k
Leak: 11353k
Overhead: 69302k
GGC runs: 396
comparing insn-attrtab.c compilation at -O2 level:
Overall memory needed: 149040k -> 147408k
Peak memory use before GGC: 98349k
Peak memory use after GGC: 83466k
Maximum of released memory in single GGC run: 39384k
Garbage: 480607k
Leak: 11234k
Overhead: 84551k
GGC runs: 341
comparing insn-attrtab.c compilation at -O3 level:
Ovarall memory allocated via mmap and sbrk decreased from 147392k to 137904k, overall -6.88%
Overall memory needed: 147392k -> 137904k
Peak memory use before GGC: 98351k
Peak memory use after GGC: 83467k
Maximum of released memory in single GGC run: 39385k
Garbage: 481652k
Leak: 11273k
Overhead: 84702k
GGC runs: 347
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 111096k
Peak memory use before GGC: 86885k
Peak memory use after GGC: 85935k
Maximum of released memory in single GGC run: 19282k
Garbage: 245826k
Leak: 55495k
Overhead: 43290k
GGC runs: 367
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 103701k
Peak memory use before GGC: 85967k
Peak memory use after GGC: 84933k
Maximum of released memory in single GGC run: 18946k
Garbage: 444943k -> 445006k
Leak: 56775k
Overhead: 65509k -> 65510k
GGC runs: 526
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 104725k
Peak memory use before GGC: 85967k
Peak memory use after GGC: 84933k
Maximum of released memory in single GGC run: 18945k
Garbage: 488034k -> 488017k
Leak: 57364k -> 57372k
Overhead: 75261k -> 75261k
GGC runs: 584
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 112441k
Peak memory use before GGC: 92707k
Peak memory use after GGC: 86227k
Maximum of released memory in single GGC run: 19713k
Garbage: 503688k -> 503725k
Leak: 57531k -> 57523k
Overhead: 76947k -> 76950k
GGC runs: 570
Head of changelog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2005-02-07 05:36:58.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2005-02-07 10:04:34.000000000 +0000
@@ -1,3 +1,40 @@
+2005-02-07 Richard Sandiford <rsandifo@redhat.com>
+
+ PR bootstrap/19796
+ Revert:
+ 2005-01-26 Richard Sandiford <rsandifo@redhat.com>
+ * config/mips/iris6.h (ENDFILE_SPEC): Don't link in irix-csr.o if
+ either -ffast-math or -funsafe-math-optimizations is in use.
+
+ 2005-01-24 Richard Sandiford <rsandifo@redhat.com>
+ * config/mips/irix-csr.c: New file.
+ * config/mips/t-iris6 (irix-csr.o): New rule to build it.
+ (EXTRA_MULTILIB_PARTS): Add irix-csr.o.
+ * config/mips/iris6.h (ENDFILE_SPEC): Include it in n32 and n64
+ executables.
+
+2005-02-07 Alexandre Oliva <aoliva@redhat.com>
+
+ * config/mn10300/linux.h (LIB_SPEC, STARTFILE_SPEC): Remove
+ redundant, incorrect definitions.
+
+ * config/frv/frv.md ("tls_indirect_call"): Turn into libcall-like
+ expand.
+ ("*tls_indirect_call"): New, reference hard regs directly.
+ * config/frv/frv.c (gen_inlined_tls_plt): Adjust.
+
+2005-02-07 Ralf Corsepius <ralf.corsepius@rtems.org>
+
+ * config/arm/rtems-elf.h (SUBTARGET_EXTRA_ASM_SPEC):
+ Let !-mhard-float !-msoft-float imply -mfpu=softfpa.
+
+2005-02-06 Roger Sayle <roger@eyesopen.com>
+
+ PR rtl-optimization/19800
+ * simplify_rtx.c (simplify_relational_operaration_1): Explicitly
+ call gen_lowpart_common and gen_lowpart_SUBREG instead of calling
+ gen_lowpart.
+
2005-02-07 Ralf Corsepius <ralf.corsepius@rtems.org>
* config/m68k/t-rtems (MULTILIB_MATCHES): Let m528x match m5200.
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.