litex_vivado.md

https://zenn.dev/tanakmura/articles/litex_linux_ae3feff0b48ede これで説明した make.py を vivado で実行

zen2

• 259.386455704 seconds time elapsed
• 11218.255071 [J]

alderlake P core

• 148.949631452 seconds time elapsed
• 4708.693756 [J]

alderlake E core

• 306.793298195 seconds time elapsed
• 3176.195971 [J]

alderlake が圧倒的にはやいし、消費電力も少ない。

htop で見てるかぎり、numactl で指定しないと、今のLinux では P-core, E-core はランダムに振られてるように見える。

# zen2
 Performance counter stats for './make.py --build --board=arty':

        430,014.53 msec task-clock                #    1.658 CPUs utilized          
         2,060,997      context-switches          #    4.793 K/sec                  
             2,882      cpu-migrations            #    6.702 /sec                   
         5,255,087      page-faults               #   12.221 K/sec                  
 1,615,079,784,254      cycles                    #    3.756 GHz                      (83.47%)
   172,481,625,622      stalled-cycles-frontend   #   10.68% frontend cycles idle     (83.43%)
   397,100,079,468      stalled-cycles-backend    #   24.59% backend cycles idle      (83.47%)
 2,007,296,528,712      instructions              #    1.24  insn per cycle         
                                                  #    0.20  stalled cycles per insn  (83.43%)
   423,176,696,430      branches                  #  984.099 M/sec                    (83.47%)
     3,807,224,597      branch-misses             #    0.90% of all branches          (83.41%)

     259.386455704 seconds time elapsed

     406.331909000 seconds user
      22.268063000 seconds sys


11218.255071 [J]

# alderlake
# numctl -C 0-15 あり
 Performance counter stats for './make.py --build --board=arty':

        231,008.79 msec task-clock                #    1.551 CPUs utilized
         1,943,789      context-switches          #    8.414 K/sec
             2,286      cpu-migrations            #    9.896 /sec
         5,195,518      page-faults               #   22.491 K/sec
 1,095,514,908,546      cycles                    #    4.742 GHz
 1,910,343,647,050      instructions              #    1.74  insn per cycle
   403,393,095,844      branches                  #    1.746 G/sec
     3,108,278,190      branch-misses             #    0.77% of all branches

     148.949631452 seconds time elapsed

     220.634331000 seconds user
      12.618163000 seconds sys


4708.693756 [J]

# alderlake
# numactl -C 16-19 あり
 Performance counter stats for './make.py --build --board=arty':

        441,542.57 msec task-clock                #    1.439 CPUs utilized
         1,121,146      context-switches          #    2.539 K/sec
           108,792      cpu-migrations            #  246.391 /sec
         5,192,256      page-faults               #   11.759 K/sec
 1,636,629,230,219      cycles                    #    3.707 GHz
 1,896,456,531,800      instructions              #    1.16  insn per cycle
   400,549,399,290      branches                  #  907.159 M/sec
     4,498,261,811      branch-misses             #    1.12% of all branches

     306.793298195 seconds time elapsed

     428.333948000 seconds user
      14.598149000 seconds sys


3176.195971 [J]