SSD202D核心板linux系统中查看系统内存等使用信息

uname (查看操作系统的内核信息)

Linux

uname -a

Linux (none) 4.9.84 #79 SMP PREEMPT Sat May 14 10:00:25 CST 2022 armv7l GNU/Linux

uname -r

4.9.84

cat /proc/cpuinfo

processor       : 0
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 9.98
Features        : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

processor       : 1
model name      : ARMv7 Processor rev 5 (v7l)
**BogoMIPS**        : 9.98
Features        : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

Hardware        :** SStar Soc (Flattened Device Tree)**
Revision        : 0000
Serial          : 0000000000000000

cat /proc/meminfo

MemTotal:         110868 kB
MemFree:           46740 kB
MemAvailable:      90120 kB
Buffers:             280 kB
Cached:            36388 kB
SwapCached:            0 kB
Active:             5952 kB
Inactive:          31108 kB
Active(anon):        392 kB
Inactive(anon):        0 kB
Active(file):       5560 kB
Inactive(file):    31108 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:           404 kB
Mapped:             2116 kB
Shmem:                 0 kB
Slab:              18180 kB
SReclaimable:      11588 kB
SUnreclaim:         6592 kB
KernelStack:         552 kB
PageTables:           52 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:       55432 kB
Committed_AS:       1080 kB
VmallocTotal:     909312 kB
VmallocUsed:           0 kB
VmallocChunk:          0 kB
CmaTotal:           2048 kB
CmaFree:            1360 kB

hostname

(none)

free

             total         used         free       shared      buffers
Mem:        110868        64080        46788            0          280
-/+ buffers:              63800        47068
Swap:            0            0            0

Mem 内存的使用信息
buff/cache 被 buffer (缓冲区)和 cache (高速缓冲存储器)使用的物理内存大小
Swap 交换空间的使用信息
total 系统总的可用物理内存大小
used 已被使用的物理内存大小
free还有多少物理内存可用
shared 被共享使用的物理内存大小
available 还可以被使用的物理内存大小（即系统可用内存约等于free+shared+buff/cache）
8.

top 　　top查看进程运行情况 (　top -H -p 进程ID 查看线程运行情况)

Mem: 64172K used, 46696K free, 0K shrd, 1123264K buff, 1123312K cached
CPU:  0.0% usr  0.0% sys  0.0% nic  100% idle  0.0% io  0.0% irq  0.0% sirq
Load average: 2.08 2.04 1.86 1/68 811
  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
  811   579 root     R     3144  2.8   0  0.0 top
  796     1 root     S     3184  2.8   1  0.0 /customer/bin/disp_init_app
    1     0 root     S     3144  2.8   1  0.0 init
  579     1 root     S     3144  2.8   0  0.0 -/bin/sh
  237     2 root     SW       0  0.0   0  0.0 [kworker/0:1]
  801     2 root     DW       0  0.0   1  0.0 [disp0_P0_MAIN]
    7     2 root     SW       0  0.0   0  0.0 [rcu_preempt]
  422     2 root     DW       0  0.0   0  0.0 [ehci_monitor]
  799     2 root     SW       0  0.0   0  0.0 [kworker/u4:2]
  434     2 root     SW       0  0.0   1  0.0 [kworker/1:1]
   17     2 root     SW       0  0.0   1  0.0 [ksoftirqd/1]
  789     2 root     SW       0  0.0   0  0.0 [kworker/u4:0]
    3     2 root     SW       0  0.0   0  0.0 [ksoftirqd/0]
  574     2 root     SW       0  0.0   1  0.0 [ubi_bgt0d]
    2     0 root     SW       0  0.0   1  0.0 [kthreadd]
    4     2 root     SW       0  0.0   0  0.0 [kworker/0:0]
    5     2 root     SW<      0  0.0   0  0.0 [kworker/0:0H]
    8     2 root     SW       0  0.0   0  0.0 [rcu_sched]
    9     2 root     SW       0  0.0   0  0.0 [rcu_bh]
   10     2 root     SW       0  0.0   0  0.0 [migration/0]

ps aux

    1 root       0:01 init
    2 root       0:00 [kthreadd]
    3 root       0:00 [ksoftirqd/0]
    4 root       0:00 [kworker/0:0]
    5 root       0:00 [kworker/0:0H]
    7 root       0:00 [rcu_preempt]
	...

fdisk -l

df -h //看到的是文件系统使用状况（不包括swap分区）

Filesystem                Size      Used Available Use% Mounted on
tmpfs                    54.1M         0     54.1M   0% /tmp
var                      54.1M         0     54.1M   0% /var
vendor                   54.1M         0     54.1M   0% /vendor
mdev                     54.1M         0     54.1M   0% /dev
tmpfs                    54.1M         0     54.1M   0% /var/run
/dev/mtdblock13           2.5M      2.5M         0 100% /config
ubi0:customer           135.7M     41.0M     94.7M  30% /customer
ubi0:appconfigs           3.8M     40.0K      3.8M   1% /appconfigs

cat /proc/version

version 4.9.84 (root@VM-QT) (gcc version 8.2.1 20180802 (GNU Toolchain for the A-profile Architecture 8.2-2018-08 (arm-rel-8.23)) ) #79 SMP PREEMPT Sat May 14 10:00:25 CST 2022