------- Comment #29 from lucier at math dot purdue dot edu 2007-11-14 12:40 ------- Subject: Re: Inordinate compile times on large routines
It appears to me from the raw logs at http://www.suse.de/~gcctest/c++bench/random/ that all runs except for the -O0 fail with an out-of-memory failure, so I don't know what this is really testing. Relevant excerpt from the logs follows. > TEST: pr26854.c > total: 782967 kB > > Execution times (seconds) > garbage collection : 0.88 ( 2%) usr 0.01 ( 0%) sys 0.90 > ( 2%) wall 0 kB ( 0%) ggc > callgraph construction: 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 > ( 0%) wall 0 kB ( 0%) ggc > cfg cleanup : 3.13 ( 7%) usr 0.00 ( 0%) sys 3.14 > ( 7%) wall 186 kB ( 0%) ggc > trivially dead code : 0.16 ( 0%) usr 0.00 ( 0%) sys 0.15 > ( 0%) wall 0 kB ( 0%) ggc > df live regs : 0.30 ( 1%) usr 0.01 ( 0%) sys 0.31 > ( 1%) wall 0 kB ( 0%) ggc > df reg dead/unused notes: 0.26 ( 1%) usr 0.01 ( 0%) sys 0.27 > ( 1%) wall 12048 kB ( 2%) ggc > register information : 0.31 ( 1%) usr 0.00 ( 0%) sys 0.31 > ( 1%) wall 0 kB ( 0%) ggc > alias analysis : 0.24 ( 1%) usr 0.00 ( 0%) sys 0.24 > ( 1%) wall 4096 kB ( 1%) ggc > rebuild jump labels : 0.27 ( 1%) usr 0.00 ( 0%) sys 0.28 > ( 1%) wall 0 kB ( 0%) ggc > preprocessing : 0.83 ( 2%) usr 0.98 (19%) sys 1.87 > ( 4%) wall 2978 kB ( 1%) ggc > lexical analysis : 0.64 ( 2%) usr 1.80 (35%) sys 2.57 > ( 5%) wall 0 kB ( 0%) ggc > parser : 2.57 ( 6%) usr 1.31 (26%) sys 3.70 > ( 8%) wall 106641 kB (22%) ggc > inline heuristics : 0.78 ( 2%) usr 0.18 ( 4%) sys 0.97 > ( 2%) wall 0 kB ( 0%) ggc > tree gimplify : 1.21 ( 3%) usr 0.11 ( 2%) sys 1.32 > ( 3%) wall 90819 kB (19%) ggc > tree eh : 0.11 ( 0%) usr 0.00 ( 0%) sys 0.10 > ( 0%) wall 0 kB ( 0%) ggc > tree CFG construction : 0.48 ( 1%) usr 0.05 ( 1%) sys 0.54 > ( 1%) wall 68530 kB (14%) ggc > tree CFG cleanup : 0.17 ( 0%) usr 0.00 ( 0%) sys 0.15 > ( 0%) wall 0 kB ( 0%) ggc > dominance computation : 0.16 ( 0%) usr 0.03 ( 1%) sys 0.20 > ( 0%) wall 0 kB ( 0%) ggc > expand : 3.52 ( 8%) usr 0.30 ( 6%) sys 3.82 > ( 8%) wall 130942 kB (27%) ggc > varconst : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.06 > ( 0%) wall 1571 kB ( 0%) ggc > jump : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.04 > ( 0%) wall 0 kB ( 0%) ggc > local alloc : 2.49 ( 6%) usr 0.04 ( 1%) sys 2.53 > ( 5%) wall 4099 kB ( 1%) ggc > global alloc : 21.22 (50%) usr 0.13 ( 3%) sys 21.36 > (45%) wall 48602 kB (10%) ggc > thread pro- & epilogue: 0.08 ( 0%) usr 0.00 ( 0%) sys 0.08 > ( 0%) wall 3 kB ( 0%) ggc > final : 2.14 ( 5%) usr 0.09 ( 2%) sys 2.21 > ( 5%) wall 763 kB ( 0%) ggc > symout : 0.19 ( 0%) usr 0.02 ( 0%) sys 0.22 > ( 0%) wall 16699 kB ( 3%) ggc > TOTAL : 42.26 5.08 > 47.39 488944 kB > TIME: 44.33 > FILESIZE: text data bss dec hex filename 2899378 423808 3040 > 3326226 32c112 ./out.o > > cc1: out of memory allocating 4064 bytes after a total of > 1020792832 bytes > total: 1884587 kB > > cc1: out of memory allocating 4064 bytes after a total of > 1020895232 bytes > Command exited with non-zero status 1 > TIME: 79.98 > FILESIZE: text data bss dec hex filename 12492 872 336 13700 3584 ./ > out.o > > cc1: out of memory allocating 4064 bytes after a total of 993718272 > bytes > total: 1884827 kB > > cc1: out of memory allocating 4064 bytes after a total of 993726464 > bytes > Command exited with non-zero status 1 > TIME: 132.93 > FILESIZE: text data bss dec hex filename 12492 872 336 13700 3584 ./ > out.o > > cc1: out of memory allocating 4064 bytes after a total of 916152320 > bytes > total: 1884835 kB > > cc1: out of memory allocating 4064 bytes after a total of 916217856 > bytes > Command exited with non-zero status 1 > TIME: 143.76 > FILESIZE: text data bss dec hex filename 12492 872 336 13700 3584 ./ > out.o -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26854
