Boost: =dev-libs/boost-1.53.0 botan: =dev-libs/botan-1.10.3-r1 With gcc 4.7.3: /usr/bin/time x86_64-pc-linux-gnu-g++-4.7.3 -Ibuild/include -I./src/wrap/python -E -fPIC -ftemplate-depth-255 -W -Wall -I/usr/include/python3.2 -O2 -pipe -march=corei7-avx -mcx16 -msahf -mpclmul -mpopcnt -mavx -msse4.2 -msse4.1 --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=3072 -mtune=corei7-avx -fmem-report -c src/wrap/python/x509.cpp -o build/python/wrap_python_x509.C Number of expanded macros: 1113768 Average number of tokens per macro expansion: 22 Line Table allocations during the compilation process Number of ordinary maps used: 5779 Ordinary map used size: 225k Number of ordinary maps allocated: 6553 Ordinary maps allocated size: 255k Number of macro maps used: 0 Macro maps used size: 0 Macro maps locations size: 0 Macro maps size: 0 Duplicated maps locations size: 0 Total allocated maps size: 255k Total used maps size: 225k Memory still allocated at the end of the compilation process Size Allocated Used Overhead 8 72k 68k 2160 16 144k 142k 3168 32 628k 624k 11k 64 20k 17k 320 128 4096 768 56 256 112k 108k 1568 512 1008k 1004k 13k 1024 2128k 2125k 29k 2048 548k 548k 7672 4096 752k 752k 10k 8192 488k 488k 3416 16384 32k 16k 112 65536 64k 0 56 262144 512k 512k 112 24 408k 402k 7344 40 92k 89k 1472 48 20k 18k 320 56 4096 4088 64 72 56k 52k 784 80 4096 800 56 88 2268k 2240k 31k 96 24k 21k 336 112 4096 2128 56 120 20k 16k 280 184 20k 15k 280 152 68k 62k 952 168 56k 54k 784 160 4096 960 56 104 4096 624 56 288 140k 134k 1960 136 4096 816 56 Total 9708k 9527k 127k String pool entries 26057 identifiers 26057 (100.00%) slots 65536 deleted 0 bytes 426k (17592186044415M overhead) table size 512k coll/search 1.0076 ins/search 0.0233 avg. entry 16.77 bytes (+/- 9.92) longest entry 79 ??? tree nodes created (No per-node statistics) Type hash: size 1021, 29 elements, 0.131148 collisions DECL_DEBUG_EXPR hash: size 1021, 0 elements, 0.000000 collisions DECL_VALUE_EXPR hash: size 1021, 0 elements, 0.000000 collisions no search statistics decl_specializations: size 61, 0 elements, 0.000000 collisions type_specializations: size 61, 0 elements, 0.000000 collisions No gimple statistics Alias oracle query stats: refs_may_alias_p: 0 disambiguations, 0 queries ref_maybe_used_by_call_p: 0 disambiguations, 0 queries call_may_clobber_ref_p: 0 disambiguations, 0 queries PTA query stats: pt_solution_includes: 0 disambiguations, 0 queries pt_solutions_intersect: 0 disambiguations, 0 queries 2.41user 0.03system 0:02.45elapsed 100%CPU (0avgtext+0avgdata 68384maxresident)k 0inputs+7176outputs (0major+5154minor)pagefaults 0swaps With gcc 4.8.1: /usr/bin/time x86_64-pc-linux-gnu-g++-4.8.1 -Ibuild/include -I./src/wrap/python -E -fPIC -ftemplate-depth-255 -W -Wall -I/usr/include/python3.2 -O2 -pipe -march=corei7-avx -mcx16 -msahf -mpclmul -mpopcnt -mavx -msse4.2 -msse4.1 --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=3072 -mtune=corei7-avx -fmem-report -c src/wrap/python/x509.cpp -o build/python/wrap_python_x509.C Number of expanded macros: 1348128 Average number of tokens per macro expansion: 18 Line Table allocations during the compilation process Number of ordinary maps used: 5782 Ordinary map used size: 225k Number of ordinary maps allocated: 6553 Ordinary maps allocated size: 255k Number of macro maps used: 1087k Macro maps used size: 42M Macro maps locations size: 210M Macro maps size: 252M Duplicated maps locations size: 55M Total allocated maps size: 274M Total used maps size: 252M Memory still allocated at the end of the compilation process Size Allocated Used Overhead 8 1304k 1294k 38k 16 148k 145k 3256 32 1268k 1107k 22k 64 5348k 5346k 83k 256 15M 15M 218k 512 20M 20M 286k 1024 10M 10M 145k 2048 217M 217M 3049k 4096 3628k 3628k 49k 8192 6136k 6136k 41k 16384 1616k 1616k 5656 32768 704k 704k 1232 262144 512k 512k 112 67108864 64M 64M 56 24 2612k 2546k 45k 40 936k 915k 14k 48 8412k 8371k 131k 56 1472k 1466k 23k 72 676k 636k 9464 80 11M 11M 158k 88 2564k 2530k 35k 96 1436k 1401k 19k 112 1508k 1480k 20k 120 2192k 2179k 29k 184 3528k 3484k 48k 128 104k 103k 1456 152 2196k 2077k 30k 168 1172k 1132k 16k 160 576k 558k 8064 104 3048k 3015k 41k 296 2576k 2388k 35k 136 2136k 2124k 29k Total 396M 394M 4643k String pool entries 26105 identifiers 26105 (100.00%) slots 65536 deleted 0 bytes 427k (17592186044415M overhead) table size 512k coll/search 1.0066 ins/search 0.0233 avg. entry 16.76 bytes (+/- 9.92) longest entry 79 (No per-node statistics) Type hash: size 1021, 29 elements, 0.131148 collisions DECL_DEBUG_EXPR hash: size 1021, 0 elements, 0.000000 collisions DECL_VALUE_EXPR hash: size 1021, 0 elements, 0.000000 collisions no search statistics decl_specializations: size 61, 0 elements, 0.000000 collisions type_specializations: size 61, 0 elements, 0.000000 collisions No gimple statistics No RTX statistics Alias oracle query stats: refs_may_alias_p: 0 disambiguations, 0 queries ref_maybe_used_by_call_p: 0 disambiguations, 0 queries call_may_clobber_ref_p: 0 disambiguations, 0 queries PTA query stats: pt_solution_includes: 0 disambiguations, 0 queries pt_solutions_intersect: 0 disambiguations, 0 queries 3.97user 0.30system 0:10.39elapsed 41%CPU (0avgtext+0avgdata 1770672maxresident)k 16384inputs+7208outputs (0major+111596minor)pagefaults 0swaps
How is this a regression? -O2 in 4.8 enables more optimisations than -O2 in 4.7. Also, progress.
(In reply to Jeroen Roovers from comment #1) > How is this a regression? -O2 in 4.8 enables more optimisations than -O2 in > 4.7. Also, progress. 1. It's a preprocessor memory consumption (note -E option), not even compiler. Compiler is fine and eats ~7MBs (there is not much to compile in bindings) 2. (actual bug) 4.7 eats 70MBs RSS, 4.8 eats 1.7G RSS (topic starter was not clear about it) > 68384maxresident)k > 1770672maxresident)k What he failed to mention is he ran -j5 on his 4GB RAM machive. Build crashed by OOM.
"uses more memory" we don't really care about. every gcc version fluctuates (sometimes using more, sometimes using less). the only thing we track is excessive memory usage. 1.7GB can be considered "excessive". what package are you actually building ? the bug summary is pretty light on details. also, always post `emerge --info` in your bug reports.
Created attachment 356364 [details] emerge --info
>> what package are you actually building ? the bug summary is pretty light on details. I build botan: =dev-libs/botan-1.10.3-r1 >>also, always post `emerge --info` in your bug reports. fixed.
gcc-4.9 is stable now, so throwing away older bugs we don't plan on doing backports for as this should be fixed w/4.9+. please re-open if it's still an issue with 4.9.3+ though.
