Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?

[Dennis Luehring <dl.soluz@gmx.net>]

Am 18.08.2015 um 10:19 schrieb Aurelien Jarno:
> How big is the source file and the output file? I find strange that I/O
> impacts so much for a compilation which should be CPU bounded. Maybe try
> to add the -pipe argument to g++.

and the gcc -ftime-report

g++ src/pugixml.cpp -g -Wall -Wextra -Werror -pedantic -std=c++0x -c 
-MMD -MP -ftime-report

Execution times (seconds)
  callgraph construction:   3.95 ( 2%) usr   1.54 ( 2%) sys   5.47 ( 2%) 
wall    1344 kB ( 2%) ggc
  callgraph optimization:   2.77 ( 1%) usr   1.35 ( 2%) sys   4.02 ( 1%) 
wall    1155 kB ( 1%) ggc
  ipa free lang data    :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) 
wall       0 kB ( 0%) ggc
  cfg cleanup           :   0.73 ( 0%) usr   0.17 ( 0%) sys   0.93 ( 0%) 
wall       7 kB ( 0%) ggc
  trivially dead code   :   0.57 ( 0%) usr   0.22 ( 0%) sys   0.95 ( 0%) 
wall       0 kB ( 0%) ggc
  df live regs          :   0.76 ( 0%) usr  -0.01 (-0%) sys   0.77 ( 0%) 
wall       0 kB ( 0%) ggc
  df reg dead/unused notes: 0.95 ( 0%) usr   0.07 ( 0%) sys   1.13 ( 0%) 
wall     839 kB ( 1%) ggc
  register information  :   0.60 ( 0%) usr   0.03 ( 0%) sys   0.64 ( 0%) 
wall       0 kB ( 0%) ggc
  alias analysis        :   0.37 ( 0%) usr   0.15 ( 0%) sys   0.49 ( 0%) 
wall     311 kB ( 0%) ggc
  rebuild jump labels   :   0.49 ( 0%) usr   0.11 ( 0%) sys   0.50 ( 0%) 
wall       0 kB ( 0%) ggc
  preprocessing         :   7.70 ( 4%) usr   8.02 ( 9%) sys  15.55 ( 5%) 
wall     801 kB ( 1%) ggc
  parser                :  42.51 (21%) usr  17.30 (20%) sys  61.96 (22%) 
wall   32967 kB (37%) ggc
  name lookup           :  27.33 (14%) usr  36.38 (43%) sys  61.97 (22%) 
wall    3781 kB ( 4%) ggc
  inline heuristics     :   1.37 ( 1%) usr   0.21 ( 0%) sys   1.66 ( 1%) 
wall       0 kB ( 0%) ggc
  tree gimplify         :   6.54 ( 3%) usr   0.50 ( 1%) sys   7.46 ( 3%) 
wall    8194 kB ( 9%) ggc
  tree eh               :   0.80 ( 0%) usr   0.23 ( 0%) sys   0.94 ( 0%) 
wall     469 kB ( 1%) ggc
  tree CFG construction :   0.96 ( 0%) usr   0.22 ( 0%) sys   1.24 ( 0%) 
wall    3391 kB ( 4%) ggc
  tree CFG cleanup      :   1.46 ( 1%) usr   0.22 ( 0%) sys   1.83 ( 1%) 
wall      11 kB ( 0%) ggc
  tree find ref. vars   :   0.34 ( 0%) usr   0.07 ( 0%) sys   0.36 ( 0%) 
wall     346 kB ( 0%) ggc
  tree PHI insertion    :   0.34 ( 0%) usr   0.09 ( 0%) sys   0.43 ( 0%) 
wall     409 kB ( 0%) ggc
  tree SSA rewrite      :   0.32 ( 0%) usr   0.18 ( 0%) sys   0.61 ( 0%) 
wall    1243 kB ( 1%) ggc
  tree SSA other        :   2.30 ( 1%) usr   1.20 ( 1%) sys   3.74 ( 1%) 
wall     152 kB ( 0%) ggc
  tree operand scan     :   1.24 ( 1%) usr   1.12 ( 1%) sys   2.35 ( 1%) 
wall    2174 kB ( 2%) ggc
  dominance frontiers   :   0.09 ( 0%) usr   0.04 ( 0%) sys   0.08 ( 0%) 
wall       0 kB ( 0%) ggc
  dominance computation :   1.15 ( 1%) usr   0.23 ( 0%) sys   1.11 ( 0%) 
wall       0 kB ( 0%) ggc
  expand                :  33.10 (17%) usr   6.31 ( 7%) sys  39.45 (14%) 
wall   16724 kB (19%) ggc
  varconst              :   0.27 ( 0%) usr   0.12 ( 0%) sys   0.60 ( 0%) 
wall      44 kB ( 0%) ggc
  jump                  :   0.16 ( 0%) usr   0.16 ( 0%) sys   0.34 ( 0%) 
wall      60 kB ( 0%) ggc
  integrated RA         :  13.32 ( 7%) usr   1.00 ( 1%) sys  13.84 ( 5%) 
wall    2521 kB ( 3%) ggc
  reload                :  11.42 ( 6%) usr   0.08 ( 0%) sys  11.68 ( 4%) 
wall    3016 kB ( 3%) ggc
  thread pro- & epilogue:   2.06 ( 1%) usr   0.11 ( 0%) sys 2.24 ( 1%) 
wall    1028 kB ( 1%) ggc
  final                 :  16.51 ( 8%) usr   0.36 ( 0%) sys  17.28 ( 6%) 
wall     609 kB ( 1%) ggc
  symout                :  11.74 ( 6%) usr   0.54 ( 1%) sys  12.19 ( 4%) 
wall    6948 kB ( 8%) ggc
  plugin execution      :   3.81 ( 2%) usr   6.63 ( 8%) sys   9.67 ( 3%) 
wall       0 kB ( 0%) ggc
  rest of compilation   :   0.02 ( 0%) usr   0.02 ( 0%) sys   0.04 ( 0%) 
wall       0 kB ( 0%) ggc
  TOTAL                 : 198.47            85.23 284.09              
89326 kB