4412開發板 DVFS camera預覽效能測試，4412dvfs

4412開發板 DVFS camera預覽效能測試，4412dvfs

核心：3.8.13

ARM: IBOX 4412

camera解析度 640x480

160000（1.6G）時4核全開， 

echo Peformance > scaling_governor

Mem: 58220K used, 969844K free, 0K shrd, 268K buff, 2524K cachedCPU: 49.7% usr  1.4% sys  0.0% nic 48.7% idle  0.0% io  0.0% irq  0.0% sirqLoad average: 1.01 0.67 0.30 2/59 1427  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 49.7 ./cam_previewfb0v3 1427  1399 0        R     2392  0.2   1  1.4 top -d1 1399     1 0        S     2392  0.2   0  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init  372     2 0        SW       0  0.0   0  0.0 [khubd]   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]    6     2 0        SW       0  0.0   1  0.0 [kworker/u:0]   16     2 0        RW       0  0.0   2  0.0 [ksoftirqd/2]    9     2 0        SW       0  0.0   1  0.0 [rcu_preempt]   13     2 0        SW       0  0.0   1  0.0 [migration/1] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3] 1324     2 0        SW       0  0.0   0  0.0 [mmcqd/0]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]    2     0 0        SW       0  0.0   1  0.0 [kthreadd]    3     2 0        SW       0  0.0   0  0.0 [ksoftirqd/0]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0]    5     2 0        SW<      0  0.0   0  0.0 [kworker/0:0H]    7     2 0        SW<      0  0.0   0  0.0 [kworker/u:0H]    8     2 0        SW       0  0.0   0  0.0 [migration/0]   10     2 0        SW       0  0.0   0  0.0 [rcu_bh]

最大頻率設定1G時，四核全開

Mem: 59380K used, 968684K free, 0K shrd, 272K buff, 2524K cachedCPU: 24.6% usr  0.2% sys  0.0% nic 74.8% idle  0.2% io  0.0% irq  0.0% sirqLoad average: 0.82 0.79 0.48 2/61 1471  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 24.6 ./cam_previewfb0v3 1471  1399 0        R     2392  0.2   3  0.2 top -d1 1399     1 0        S     2392  0.2   1  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]  372     2 0        SW       0  0.0   0  0.0 [khubd] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3]    6     2 0        SW       0  0.0   2  0.0 [kworker/u:0]   16     2 0        SW       0  0.0   2  0.0 [ksoftirqd/2]    9     2 0        SW       0  0.0   3  0.0 [rcu_preempt] 1324     2 0        SW       0  0.0   3  0.0 [mmcqd/0]   13     2 0        SW       0  0.0   1  0.0 [migration/1]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]   35     2 0        SW       0  0.0   2  0.0 [kworker/2:1]   37     2 0        SW       0  0.0   3  0.0 [kworker/3:1] 1385     2 0        SW       0  0.0   1  0.0 [jbd2/mmcblk1p3-] 1411     2 0        SW       0  0.0   1  0.0 [flush-179:0]    2     0 0        SW       0  0.0   1  0.0 [kthreadd]    3     2 0        SW       0  0.0   0  0.0 [ksoftirqd/0]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0]

最大頻率設定1G時，開3個核

Mem: 59080K used, 968984K free, 0K shrd, 288K buff, 2524K cachedCPU: 32.7% usr  0.3% sys  0.0% nic 66.8% idle  0.0% io  0.0% irq  0.0% sirqLoad average: 0.91 0.82 0.52 2/60 1477  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 32.7 ./cam_previewfb0v3 1477  1399 0        R     2392  0.2   3  0.3 top -d1 1399     1 0        S     2392  0.2   3  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]  372     2 0        SW       0  0.0   0  0.0 [khubd] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3]    6     2 0        SW       0  0.0   2  0.0 [kworker/u:0]   16     2 0        SW       0  0.0   2  0.0 [ksoftirqd/2]    9     2 0        SW       0  0.0   3  0.0 [rcu_preempt] 1324     2 0        SW       0  0.0   3  0.0 [mmcqd/0]   35     2 0        SW       0  0.0   2  0.0 [kworker/2:1]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]   37     2 0        SW       0  0.0   3  0.0 [kworker/3:1] 1385     2 0        SW       0  0.0   2  0.0 [jbd2/mmcblk1p3-] 1411     2 0        SW       0  0.0   2  0.0 [flush-179:0]    2     0 0        SW       0  0.0   1  0.0 [kthreadd]    3     2 0        SW       0  0.0   0  0.0 [ksoftirqd/0]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0]    5     2 0        SW<      0  0.0   0  0.0 [kworker/0:0H]

最大頻率設定1G，只開啟一個核

Mem: 57916K used, 970148K free, 0K shrd, 300K buff, 2524K cachedCPU: 68.3% usr  0.0% sys  0.0% nic 31.6% idle  0.0% io  0.0% irq  0.0% sirqLoad average: 0.76 0.80 0.53 2/58 1481  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 67.2 ./cam_previewfb0v3 1481  1399 0        R     2392  0.2   0  0.9 top -d1 1399     1 0        S     2392  0.2   0  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]  372     2 0        SW       0  0.0   0  0.0 [khubd] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3]    6     2 0        SW       0  0.0   0  0.0 [kworker/u:0]   16     2 0        RW       0  0.0   2  0.0 [ksoftirqd/2]    9     2 0        SW       0  0.0   0  0.0 [rcu_preempt] 1324     2 0        SW       0  0.0   0  0.0 [mmcqd/0]   35     2 0        SW       0  0.0   2  0.0 [kworker/2:1] 1385     2 0        SW       0  0.0   0  0.0 [jbd2/mmcblk1p3-]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]   37     2 0        SW       0  0.0   3  0.0 [kworker/3:1] 1411     2 0        SW       0  0.0   0  0.0 [flush-179:0]    2     0 0        SW       0  0.0   1  0.0 [kthreadd]    3     2 0        SW       0  0.0   0  0.0 [ksoftirqd/0]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0]    5     2 0        SW<      0  0.0   0  0.0 [kworker/0:0H]

最低效能模式時， 頻率200MHz，只開了兩個核（lcd預覽畫面十分卡頓）

echo powersave > cpu0/cpufreq/scaling_governor
CPU3: shutdown
CPU2: shutdown

Mem: 58672K used, 969392K free, 0K shrd, 340K buff, 2524K cachedCPU: 49.7% usr  1.9% sys  0.0% nic 48.3% idle  0.0% io  0.0% irq  0.0% sirqLoad average: 0.99 0.80 0.65 2/59 1495  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 49.7 ./cam_previewfb0v3 1495  1399 0        R     2392  0.2   1  1.4 top -d1 1399     1 0        S     2392  0.2   1  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]  372     2 0        SW       0  0.0   0  0.0 [khubd] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3]    6     2 0        SW       0  0.0   3  0.0 [kworker/u:0]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0]    9     2 0        SW       0  0.0   1  0.0 [rcu_preempt]   16     2 0        RW       0  0.0   2  0.0 [ksoftirqd/2] 1324     2 0        SW       0  0.0   1  0.0 [mmcqd/0]   35     2 0        SW       0  0.0   2  0.0 [kworker/2:1]   37     2 0        SW       0  0.0   3  0.0 [kworker/3:1] 1385     2 0        SW       0  0.0   1  0.0 [jbd2/mmcblk1p3-] 1411     2 0        SW       0  0.0   1  0.0 [flush-179:0]   14     2 0        SW       0  0.0   1  0.0 [kworker/1:0]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]    2     0 0        SW       0  0.0   0  0.0 [kthreadd]    3     2 0        SW       0  0.0   0  0.0 [ksoftirqd/0]

最低效能模式，200MHz， 只開啟一個核（畫面卡頓，幾乎滿負荷運行）

Mem: 58020K used, 970044K free, 0K shrd, 352K buff, 2524K cachedCPU: 97.1% usr  2.8% sys  0.0% nic  0.0% idle  0.0% io  0.0% irq  0.0% sirqLoad average: 1.00 0.87 0.69 2/58 1500  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND 1412  1399 0        R     5004  0.4   0 97.0 ./cam_previewfb0v3 1500  1399 0        R     2392  0.2   0  2.8 top -d1 1399     1 0        S     2392  0.2   0  0.0 -/bin/sh    1     0 0        S     2388  0.2   3  0.0 init   34     2 0        SW       0  0.0   1  0.0 [kworker/1:1]  372     2 0        SW       0  0.0   0  0.0 [khubd]    4     2 0        SW       0  0.0   0  0.0 [kworker/0:0] 1356     2 0        SW       0  0.0   0  0.0 [kworker/0:3]    6     2 0        SW       0  0.0   0  0.0 [kworker/u:0]    9     2 0        SW       0  0.0   0  0.0 [rcu_preempt]   16     2 0        RW       0  0.0   2  0.0 [ksoftirqd/2] 1324     2 0        SW       0  0.0   0  0.0 [mmcqd/0]   35     2 0        SW       0  0.0   2  0.0 [kworker/2:1]   14     2 0        SW       0  0.0   1  0.0 [kworker/1:0]   37     2 0        SW       0  0.0   3  0.0 [kworker/3:1] 1385     2 0        SW       0  0.0   0  0.0 [jbd2/mmcblk1p3-] 1411     2 0        SW       0  0.0   0  0.0 [flush-179:0]    8     2 0        SW       0  0.0   0  0.0 [migration/0]   26     2 0        SW       0  0.0   1  0.0 [kdevtmpfs]    2     0 0        SW       0  0.0   0  0.0 [kthreadd]