Raspberry Pi + Behringer UCA222 で Live mp3 streaming しているときの負荷

gistfile1.sh

top - 13:23:02 up 14:11,  1 user,  load average: 1.80, 1.74, 1.66
Tasks:  60 total,   1 running,  59 sleeping,   0 stopped,   0 zombie
%Cpu(s): 51.9 us,  2.1 sy,  0.0 ni, 45.7 id,  0.0 wa,  0.0 hi,  0.4 si,  0.0 st
KiB Mem:    448996 total,   105712 used,   343284 free,    19392 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    63216 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
 3383 pi        20   0 10980 2760 2148 S  50.2  0.6 236:07.72 darkice
 3359 icecast2  20   0 13916 3032 2112 S   1.0  0.7   4:18.36 icecast2
 4900 pi        20   0  5644 1396 1040 R   0.8  0.3   0:06.64 top
 1440 root      20   0  1744  548  456 S   0.2  0.1   0:33.65 ifplugd
 1928 www-data  20   0 11712 1484  616 S   0.2  0.3   0:12.11 nginx
 1929 www-data  20   0 11712 1484  616 S   0.2  0.3   0:12.22 nginx
 2543 pi        20   0 10556 1504  884 S   0.2  0.3   0:08.01 sshd