https://gist.github.com/tanakamura/efbfab5cfdf6707d098714d616dd6ef3
PL2 を変えてやってみた
PL2 = 80W
Performance counter stats for 'make -j 40':
1,434,950.67 msec task-clock # 18.018 CPUs utilized
356,248 context-switches # 248.265 /sec
39,154 cpu-migrations # 27.286 /sec
53,179,405 page-faults # 37.060 K/sec
4,402,730,898,128 cpu_core/cycles/ # 3.068 G/sec (92.78%)
1,299,790,565,661 cpu_atom/cycles/ # 905.809 M/sec (66.05%)
5,039,193,669,901 cpu_core/instructions/ # 3.512 G/sec (92.78%)
1,515,879,976,927 cpu_atom/instructions/ # 1.056 G/sec (66.05%)
1,066,021,211,832 cpu_core/branches/ # 742.897 M/sec (92.78%)
319,682,609,192 cpu_atom/branches/ # 222.783 M/sec (66.05%)
26,986,051,131 cpu_core/branch-misses/ # 18.806 M/sec (92.78%)
8,568,282,108 cpu_atom/branch-misses/ # 5.971 M/sec (66.05%)
79.638381338 seconds time elapsed
1299.516256000 seconds user
132.865986000 seconds sys
6024.618794 [J]
PL2 = 100W
Kernel: arch/x86/boot/bzImage is ready (#17)
Performance counter stats for 'make -j 40':
1,332,063.88 msec task-clock # 17.879 CPUs utilized
351,666 context-switches # 264.001 /sec
39,644 cpu-migrations # 29.761 /sec
53,170,341 page-faults # 39.916 K/sec
4,475,024,938,038 cpu_core/cycles/ # 3.359 G/sec (93.05%)
1,390,233,182,298 cpu_atom/cycles/ # 1.044 G/sec (60.76%)
5,047,304,143,745 cpu_core/instructions/ # 3.789 G/sec (93.05%)
1,613,942,262,542 cpu_atom/instructions/ # 1.212 G/sec (60.76%)
1,067,641,081,527 cpu_core/branches/ # 801.494 M/sec (93.05%)
340,459,316,552 cpu_atom/branches/ # 255.588 M/sec (60.76%)
26,924,153,073 cpu_core/branch-misses/ # 20.212 M/sec (93.05%)
9,128,683,657 cpu_atom/branch-misses/ # 6.853 M/sec (60.76%)
74.503134705 seconds time elapsed
1204.126949000 seconds user
125.515988000 seconds sys
7041.411845 [J]
PL2を80Wに下げれば 時間が 70sec -> 80secに悪くなって 消費電力が 9956J -> 6024J に
あなたはどう思いますか？