你好，
我的板子用busybox top命令，显示CPU占用率达30%， 但是进程里面加起来不到2%， 这是哪里的原因，怎么排查。
Mem: 1297700K used, 757296K free, 988K shrd, 8476K buff, 581740K cached
CPU: 32.1% usr 0.0% sys 0.1% nic 67.5% idle 0.0% io 0.0% irq 0.1% sirq
Load average: 3.08 2.67 1.59 2/1044 5341
PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND
3705 3454 system S < 1773m 88.3 3 0.4 system_server
3879 3454 system S 1118m 55.7 2 0.4 com.droidlogic
3461 1 audioser S 49172 2.3 4 0.4 {audio@2.0-servi} /vendor/bin/hw/android.hardware.audio@2.0-service
3459 1 root S 21924 1.0 5 0.2 /vendor/bin/systemcontrol
3354 1 logd S N 11216 0.5 5 0.1 /system/bin/logd
5340 5186 shell R 5112 0.2 0 0.0 busybox top
7 2 root SW 0 0.0 0 0.0 [rcu_preempt]
2026 2 root SW 0 0.0 0 0.0 [cfinteractive]
2374 2 root SW 0 0.0 5 0.0 [kworker/5:2]
5286 3454 radio S 1124m 56.0 2 0.0 {m.android.phone} com.android.phone
3456 1 root S 16864 0.8 2 0.0 /vendor/bin/hdmicecd
3544 1 root S 11260 0.5 3 0.0 /vendor/bin/hw/rild -l /vendor/lib/libquectel-ril.so
3479 1 system S 7624 0.3 4 0.0 {memtrack@1.0-se} /vendor/bin/hw/android.hardware.memtrack@1.0-service
3449 2 root SW 0 0.0 0 0.0 [isp_connection]
2148 2 root SW 0 0.0 0 0.0 [kthread_di]
1449 2 root SW 0 0.0 2 0.0 [kworker/2:1]
4374 3454 u0_a53 S 1695m 84.4 5 0.0 {dashi.benchmark} com.ludashi.benchmark
4700 3454 u0_a54 S 1689m 84.1 4 0.0 {ABenchMark:push} com.antutu.ABenchMark:push
4462 3454 u0_a53 S 1670m 83.1 4 0.0 {nchmark:channel} com.ludashi.benchmark:channel
4430 3454 u0_a53 S 1662m 82.7 0 0.0 {benchmark:clean} com.ludashi.benchmark:clean
4443 3454 u0_a53 S 1659m 82.6 0 0.0 {.benchmark:work} com.ludashi.benchmark:work
4953 3454 u0_a50 S 1625m 80.9 2 0.0 {gic.mediacenter} com.droidlogic.mediacenter
3454 1 root S 1549m 77.2 5 0.0 {main} zygote
4520 1 u0_a53 S < 1398m 69.6 4 0.0 clean
4526 1 u0_a53 S < 1398m 69.6 2 0.0 channel
4513 1 u0_a53 S < 1398m 69.6 2 0.0 work
$ dumpsys cpuinfo
Load: 2.67 / 2.54 / 1.47
CPU usage from 540100ms to 240054ms ago (2009-01-01 00:05:04.059 to 2009-01-01 00:10:04.105):
4.2% 3879/com.droidlogic: 4.2% user + 0% kernel / faults: 12902 minor
3.8% 3461/android.hardware.audio@2.0-service: 3.7% user + 0% kernel / faults: 1198 minor
2.9% 3705/system_server: 2.9% user + 0% kernel / faults: 5996 minor
2.4% 3459/systemcontrol: 2.4% user + 0% kernel / faults: 11092 minor
0.5% 7/rcu_preempt: 0.5% user + 0% kernel
0.3% 2026/cfinteractive: 0.3% user + 0% kernel
0.3% 2148/kthread_di: 0.3% user + 0% kernel
0.3% 3449/isp_connection: 0.3% user + 0% kernel
0.2% 2374/kworker/5:2: 0.2% user + 0% kernel
0.1% 1449/kworker/2:1: 0.1% user + 0% kernel
0.1% 3506/surfaceflinger: 0.1% user + 0% kernel / faults: 258 minor
0.1% 3456/hdmicecd: 0.1% user + 0% kernel
0.1% 3853/com.android.systemui: 0.1% user + 0% kernel / faults: 1305 minor
0.1% 3544/rild: 0.1% user + 0% kernel / faults: 200 minor
0% 4/kworker/0:0: 0% user + 0% kernel
0% 3450/isp_process: 0% user + 0% kernel
0% 4374/com.ludashi.benchmark: 0% user + 0% kernel / faults: 466 minor 2 major
0% 3476/android.hardware.graphics.composer@2.2-service: 0% user + 0% kernel / faults: 180 minor
0% 4700/com.antutu.ABenchMark:push: 0% user + 0% kernel / faults: 53 minor
0% 1511/kworker/4:1: 0% user + 0% kernel
0% 3354/logd: 0% user + 0% kernel / faults: 1 minor
0% 3479/android.hardware.memtrack@1.0-service: 0% user + 0% kernel / faults: 216 minor
0% 4462/com.ludashi.benchmark:channel: 0% user + 0% kernel / faults: 72 minor
0% 2138/kthread_hdcp: 0% user + 0% kernel
0% 5286/com.android.phone: 0% user + 0% kernel
0% 2647/kworker/u13:1: 0% user + 0% kernel
0% 3558/wificond: 0% user + 0% kernel / faults: 102 minor
0% 3453/netd: 0% user + 0% kernel / faults: 54 minor
0% 3493/lmkd: 0% user + 0% kernel
0% 3541/adbd: 0% user + 0% kernel / faults: 1048 minor
0% 35/ksoftirqd/4: 0% user + 0% kernel
0% 2193/videosync: 0% user + 0% kernel
0% 3568/mdnsd: 0% user + 0% kernel / faults: 16 minor
0% 4430/com.ludashi.benchmark:clean: 0% user + 0% kernel / faults: 19 minor
0% 2214/irq/71-meson-am: 0% user + 0% kernel
0% 2424/mmcqd/0: 0% user + 0% kernel
0% 2643/kworker/u13:0: 0% user + 0% kernel
0% 3355/servicemanager: 0% user + 0% kernel / faults: 19 minor
0% 3556/statsd: 0% user + 0% kernel / faults: 120 minor
0% 4040/kworker/u13:2: 0% user + 0% kernel
0% 4205/dhd_dpc: 0% user + 0% kernel
0% 4215/wpa_supplicant: 0% user + 0% kernel / faults: 36 minor
0% 4443/com.ludashi.benchmark:work: 0% user + 0% kernel / faults: 18 minor
0% 5186/sh: 0% user + 0% kernel / faults: 32 minor
32% TOTAL: 31% user + 0% kernel + 0% iowait + 0.3% softirq