https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #79 from Richard Biener <rguenth at gcc dot gnu.org> ---
On the GCC 8 branch with -g -O0 (x86_64-linux) I get
TOTAL : 9.59 0.49 10.09
551543 kB
10.53user 0.55system 0:11.08elapsed 99%CPU (0avgtext+0avgdata
1230908maxresident)k
0inputs+68384outputs (0major+379474minor)pagefaults 0swaps
On trunk with mem-stats the biggest offender is (as reported)
df_scan mw_reg alloc-pool.h:487 (df_scan_alloc)
1136 0 : 0.0% 483M 38M: 92.4% 32
going up to -Ofast makes compile-time explode again. For the reduced testcase
it's still inlining and PTA:
ipa inlining heuristics : 41.55 ( 36%) 0.01 ( 1%) 41.60 ( 36%)
6333 kB ( 2%)
alias stmt walking : 14.73 ( 13%) 0.14 ( 18%) 14.98 ( 13%)
164 kB ( 0%)
tree PTA : 37.93 ( 33%) 0.23 ( 30%) 38.16 ( 33%)
31921 kB ( 8%)
TOTAL : 115.67 0.77 116.52
411925 kB
115.83user 0.81system 1:56.71elapsed 99%CPU (0avgtext+0avgdata
1034364maxresident)k
1624inputs+12624outputs (1major+308881minor)pagefaults 0swaps
trunk seems to behave similar:
ipa inlining heuristics : 53.74 ( 41%) 0.02 ( 2%) 53.75 ( 40%)
5428 kB ( 1%)
alias stmt walking : 14.98 ( 11%) 0.19 ( 23%) 15.16 ( 11%)
165 kB ( 0%)
tree PTA : 39.70 ( 30%) 0.24 ( 29%) 39.92 ( 30%)
31896 kB ( 8%)
TOTAL : 132.01 0.83 132.85
407617 kB
132.01user 0.86system 2:12.88elapsed 99%CPU (0avgtext+0avgdata
1034096maxresident)k
0inputs+8224outputs (0major+301553minor)pagefaults 0swaps
flat perf profile:
Samples: 510K of event 'instructions:p', Event count (approx.): 715615147320
Overhead Samples Command Shared Object Symbol
8.08% 95243 f951 f951 [.] bitmap_ior_into
7.21% 25966 f951 f951 [.] sreal::operator*
5.43% 19353 f951 f951 [.]
hash_table<hash_map<int_h
5.20% 23167 f951 f951 [.] get_ref_base_and_extent
4.93% 17947 f951 f951 [.]
profile_count::to_sreal_s
4.37% 15865 f951 f951 [.] sreal::operator/
3.45% 30532 f951 f951 [.] bitmap_set_bit
3.41% 12159 f951 f951 [.]
hash_table<hash_map<int_h
3.08% 11034 f951 f951 [.] default_binds_local_p_3
3.08% 11146 f951 f951 [.]
hash_table<hash_map<int_h
2.21% 7877 f951 f951 [.]
want_inline_small_functio
1.93% 6874 f951 f951 [.] edge_badness
1.87% 6675 f951 f951 [.]
compute_inlined_call_time
the ipa_fn_summary hash and edge_growth_cache / call_summary hashes are
oddly on top of the profile...
