4412 Development Board DVFS camera preview performance test, 4412 dvfs

4412 Development Board DVFS camera preview performance test, 4412 dvfs

Kernel: 3.8.13

ARM: IOS 4412

Camera Resolution 640x480

160000 (1.6 GB), 4-core,

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]

When the maximum frequency is 1 GB, the quad-core is fully enabled.

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]

When the maximum frequency is 1 GB, three cores are enabled.

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]

The maximum frequency is 1 GB. Only one core is enabled.

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]

In the lowest performance mode, the frequency is 200 MHz and only two cores are enabled (the LCD preview screen is very choppy)

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]

The minimum performance mode is 200 MHz. Only one core is enabled (the screen is choppy and runs almost at full capacity)

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]