linux cpu,内存, 使用情况

1. cpu 使用

查看CPU的完整信息:

root@squid ~]# cat /proc/cpuinfo

输出结果如下:

[root@squid ~]# cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
stepping	: 7
cpu MHz		: 3392.294
cache size	: 8192 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx hypervisor lahf_lm ida arat xsaveopt pln pts dts
bogomips	: 6784.58
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
stepping	: 7
cpu MHz		: 3392.294
cache size	: 8192 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx hypervisor lahf_lm ida arat xsaveopt pln pts dts
bogomips	: 6784.58
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

[root@squid ~]#

查看物理CPU的个数:

[root@squid ~]# cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l
1
[root@squid ~]#

查看每个物理CPU中的core个数(即核数)

[root@squid ~]# cat /proc/cpuinfo | grep "cpu core" | uniq
cpu cores : 2
[root@squid ~]#

查看逻辑CPU的个数:

[root@squid ~]# cat /proc/cpuinfo | grep "processor" | wc -l
2
[root@squid ~]#

2.查看内存

命令如下:

[root@squid ~]# free -m
             total       used       free     shared    buffers     cached
Mem:           996        193        803          0          8         53
-/+ buffers/cache:        130        865
Swap:         3999          0       3999
[root@squid ~]#

total: 内存总数
used: 已经使用的内存数
free: 空闲的内存数
shared: 当前已经废弃不用,总是0
buffers: 缓冲内存数,8M
cache: 缓存内存数, 53M

– buffers/cache: used的内存数,130MB(used-buffers-cache)
– buffers/cache: free的内存数 865MB (free+buffers+cache)

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