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A recent patch decreased 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: Sat, 23 Dec 2006 05:39:59 +0000
- Subject: A recent patch decreased 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: 18297k -> 18305k
Peak memory use before GGC: 2235k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 293k
Garbage: 423k
Leak: 2273k
Overhead: 446k
GGC runs: 3
comparing empty function compilation at -O0 -g level:
Overall memory needed: 18313k -> 18321k
Peak memory use before GGC: 2263k
Peak memory use after GGC: 1970k
Maximum of released memory in single GGC run: 293k
Garbage: 426k
Leak: 2305k
Overhead: 450k
GGC runs: 3
comparing empty function compilation at -O1 level:
Overall memory needed: 18397k -> 18405k
Peak memory use before GGC: 2235k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 293k
Garbage: 427k
Leak: 2275k
Overhead: 446k
GGC runs: 4
comparing empty function compilation at -O2 level:
Overall memory needed: 18409k -> 18417k
Peak memory use before GGC: 2236k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 294k
Garbage: 430k -> 430k
Leak: 2275k
Overhead: 447k -> 447k
GGC runs: 4
comparing empty function compilation at -O3 level:
Overall memory needed: 18409k -> 18417k
Peak memory use before GGC: 2236k
Peak memory use after GGC: 1942k
Maximum of released memory in single GGC run: 294k
Garbage: 430k -> 430k
Leak: 2275k
Overhead: 447k -> 447k
GGC runs: 4
comparing combine.c compilation at -O0 level:
Overall memory needed: 28465k -> 28473k
Peak memory use before GGC: 9288k
Peak memory use after GGC: 8803k
Maximum of released memory in single GGC run: 2642k
Garbage: 37567k
Leak: 6454k
Overhead: 4875k
GGC runs: 281
comparing combine.c compilation at -O0 -g level:
Overall memory needed: 30541k -> 30549k
Peak memory use before GGC: 10834k
Peak memory use after GGC: 10463k
Maximum of released memory in single GGC run: 2320k
Garbage: 38128k
Leak: 9346k
Overhead: 5576k
GGC runs: 272
comparing combine.c compilation at -O1 level:
Overall memory needed: 29474k
Peak memory use before GGC: 16963k
Peak memory use after GGC: 16792k
Maximum of released memory in single GGC run: 2251k
Garbage: 55759k -> 55778k
Leak: 6489k -> 6481k
Overhead: 9966k -> 9963k
GGC runs: 357
comparing combine.c compilation at -O2 level:
Overall memory needed: 29474k
Peak memory use before GGC: 16967k
Peak memory use after GGC: 16792k
Maximum of released memory in single GGC run: 2373k -> 2374k
Garbage: 71973k -> 71989k
Leak: 6602k -> 6604k
Overhead: 11954k -> 11953k
GGC runs: 412 -> 413
comparing combine.c compilation at -O3 level:
Overall memory needed: 29602k
Peak memory use before GGC: 18067k
Peak memory use after GGC: 17600k
Maximum of released memory in single GGC run: 3689k -> 3692k
Garbage: 106221k -> 106245k
Leak: 6684k
Overhead: 16876k -> 16872k
GGC runs: 460
comparing insn-attrtab.c compilation at -O0 level:
Overall memory needed: 89650k
Peak memory use before GGC: 71193k
Peak memory use after GGC: 44699k
Maximum of released memory in single GGC run: 37868k
Garbage: 132141k
Leak: 9518k
Overhead: 16956k
GGC runs: 211
comparing insn-attrtab.c compilation at -O0 -g level:
Overall memory needed: 90826k
Peak memory use before GGC: 72354k
Peak memory use after GGC: 45966k
Maximum of released memory in single GGC run: 37868k
Garbage: 133548k
Leak: 10981k
Overhead: 17351k
GGC runs: 209
comparing insn-attrtab.c compilation at -O1 level:
Overall memory needed: 93730k
Peak memory use before GGC: 71858k
Peak memory use after GGC: 67990k
Maximum of released memory in single GGC run: 31668k
Garbage: 229899k -> 229914k
Leak: 9343k
Overhead: 29520k -> 29517k
GGC runs: 220
comparing insn-attrtab.c compilation at -O2 level:
Ovarall memory allocated via mmap and sbrk decreased from 124006k to 105134k, overall -17.95%
Overall memory needed: 124006k -> 105134k
Peak memory use before GGC: 79550k
Peak memory use after GGC: 73715k
Maximum of released memory in single GGC run: 30212k
Garbage: 282712k -> 282755k
Leak: 9345k
Overhead: 35776k -> 35780k
GGC runs: 243 -> 244
comparing insn-attrtab.c compilation at -O3 level:
Ovarall memory allocated via mmap and sbrk decreased from 123766k to 105158k, overall -17.70%
Overall memory needed: 123766k -> 105158k
Peak memory use before GGC: 79576k
Peak memory use after GGC: 73740k
Maximum of released memory in single GGC run: 30406k -> 30407k
Garbage: 283552k -> 283574k
Leak: 9350k
Overhead: 36009k -> 36008k
GGC runs: 247
comparing Gerald's testcase PR8361 compilation at -O0 level:
Overall memory needed: 119066k
Peak memory use before GGC: 92331k
Peak memory use after GGC: 91417k
Maximum of released memory in single GGC run: 19248k
Garbage: 212896k
Leak: 48116k
Overhead: 21264k
GGC runs: 417
comparing Gerald's testcase PR8361 compilation at -O0 -g level:
Overall memory needed: 131642k
Peak memory use before GGC: 104692k
Peak memory use after GGC: 103652k
Maximum of released memory in single GGC run: 18936k
Garbage: 219492k
Leak: 71548k
Overhead: 27169k
GGC runs: 390
comparing Gerald's testcase PR8361 compilation at -O1 level:
Overall memory needed: 119502k
Peak memory use before GGC: 96665k
Peak memory use after GGC: 94462k
Maximum of released memory in single GGC run: 17940k
Garbage: 442217k -> 442205k
Leak: 50183k
Overhead: 100280k -> 100280k
GGC runs: 562
comparing Gerald's testcase PR8361 compilation at -O2 level:
Overall memory needed: 119558k
Peak memory use before GGC: 96693k
Peak memory use after GGC: 94490k
Maximum of released memory in single GGC run: 18081k
Garbage: 497568k -> 497579k
Leak: 51152k
Overhead: 58887k -> 58889k
GGC runs: 614
comparing Gerald's testcase PR8361 compilation at -O3 level:
Overall memory needed: 121138k
Peak memory use before GGC: 97647k
Peak memory use after GGC: 96143k
Maximum of released memory in single GGC run: 18476k
Garbage: 517902k -> 517913k
Leak: 51126k
Overhead: 58882k -> 58884k
GGC runs: 620
comparing PR rtl-optimization/28071 testcase compilation at -O0 level:
Overall memory needed: 137290k -> 137634k
Peak memory use before GGC: 81587k
Peak memory use after GGC: 58467k
Maximum of released memory in single GGC run: 45166k
Garbage: 148528k
Leak: 7542k
Overhead: 25329k
GGC runs: 82
comparing PR rtl-optimization/28071 testcase compilation at -O0 -g level:
Overall memory needed: 138014k
Peak memory use before GGC: 82233k
Peak memory use after GGC: 59113k
Maximum of released memory in single GGC run: 45232k
Garbage: 148738k
Leak: 9309k
Overhead: 25824k
GGC runs: 88
comparing PR rtl-optimization/28071 testcase compilation at -O1 level:
Overall memory needed: 421226k -> 421134k
Peak memory use before GGC: 199539k
Peak memory use after GGC: 193352k
Maximum of released memory in single GGC run: 112477k
Garbage: 287375k -> 287375k
Leak: 29778k
Overhead: 32193k -> 32193k
GGC runs: 98
comparing PR rtl-optimization/28071 testcase compilation at -O2 level:
Overall memory needed: 343394k -> 343746k
Peak memory use before GGC: 199532k
Peak memory use after GGC: 193345k
Maximum of released memory in single GGC run: 111911k -> 111908k
Garbage: 364383k -> 364381k
Leak: 30361k
Overhead: 47296k -> 47296k
GGC runs: 104
comparing PR rtl-optimization/28071 testcase compilation at -O3 -fno-tree-pre -fno-tree-fre level:
Overall memory needed: 749294k -> 749290k
Peak memory use before GGC: 317673k
Peak memory use after GGC: 296148k
Maximum of released memory in single GGC run: 186409k -> 186406k
Garbage: 504462k -> 504459k
Leak: 45414k
Overhead: 60273k -> 60272k
GGC runs: 99
Head of the ChangeLog is:
--- /usr/src/SpecTests/sandbox-britten-memory/x86_64/mem-result/ChangeLog 2006-12-22 12:13:26.000000000 +0000
+++ /usr/src/SpecTests/sandbox-britten-memory/gcc/gcc/ChangeLog 2006-12-23 03:55:20.000000000 +0000
@@ -1,3 +1,68 @@
+2006-12-23 Jan Hubicka <jh@suse.cz>
+
+ * tree-flow-inline.h (var_ann): External variable annotations are
+ unshared too.
+ (tree_common_ann): Handle correctly unshared variables annotations.
+ * tree-dfa.c (create_var_ann): External variable annotations are
+ unshared too.
+
+2006-12-22 Kazu Hirata <kazu@codesourcery.com>
+
+ * basic-block.h: Remove the prototype for
+ commit_edge_insertions_watch_calls.
+ * cfgrtl.c (commit_edge_insertion): Drop the last argument.
+ Simplify.
+ (commit_edge_insertions_watch_calls): Remove.
+ (commit_edge_insertions): Adjust the call to
+ commit_one_edge_insertion.
+
+2006-12-22 Zdenek Dvorak <dvorakz@suse.cz>
+
+ * tree-ssa-loop-niter.c (zero_p, nonzero_p): Removed.
+ (number_of_iterations_ne, number_of_iterations_lt_to_ne,
+ assert_no_overflow_lt, assert_loop_rolls_lt,
+ number_of_iterations_lt, number_of_iterations_le,
+ number_of_iterations_cond, tree_simplify_using_condition_1,
+ number_of_iterations_exit, find_loop_niter, loop_niter_by_eval,
+ implies_nonnegative_p, implies_ge_p, record_nonwrapping_iv,
+ idx_infer_loop_bounds, n_of_executions_at_most, scev_probably_wraps_p):
+ Do not use zero_p/nonzero_p.
+ * tree-ssa-loop-manip.c (determine_exit_conditions): Ditto.
+ * tree-ssa-loop-ivopts.c (niter_for_exit, determine_biv_step,
+ find_interesting_uses_op, find_interesting_uses_cond,
+ find_interesting_uses_address, find_interesting_uses_stmt,
+ strip_offset_1, add_candidate_1, add_old_ivs_candidates,
+ difference_cost, determine_use_iv_cost_condition,
+ rewrite_use_compare, remove_unused_ivs): Ditto.
+ * tree-ssa-address.c (tree_mem_ref_addr, create_mem_ref_raw): Ditto.
+ * tree-ssa-loop-prefetch.c (idx_analyze_ref): Ditto.
+ * tree-cfg.c (find_taken_edge_cond_expr): Ditto.
+ * tree.h (zero_p): Declaration removed.
+ (null_or_integer_zerop, nonnull_and_integer_nonzerop): New.
+
+2006-12-22 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
+
+ PR middle-end/7651
+ * c.opt (Wclobbered): New.
+ * doc/invoke.texi (Wclobbered): Document it.
+ (Wextra): Enabled by -Wextra.
+ * c-opts.c (c_common_post_options): Enabled by -Wextra.
+ * flow.c (rest_of_handle_life): Replace Wextra with Wclobbered.
+ * function.c (setjmp_vars_warning): Only warn for Wclobbered.
+ (setjmp_args_warning): Likewise.
+
+2006-12-22 Kazu Hirata <kazu@codesourcery.com>
+
+ * config/elfos.h, config/spu/spu.c, tree-ssa-operands.h,
+ tree-ssa-ter.c: Fix comment typos.
+
+2006-12-22 Paolo Bonzini <bonzini@gnu.org>
+
+ PR rtl-optimization/29840
+
+ * fwprop.c (forward_propagate_into): Reject artificial uses/defs.
+ (fwprop_init): Add DF_HARD_REGS to df_init call.
+
2006-12-21 Andrew Pinski <pinskia@gmail.com>
* tree-nested.c (create_tmp_var_for): Check for vector type
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.