查看linux機器cpu、內存環境信息

2C2G，4C4G，8C16G，16C32G

這裏C指cpu物理核數，G指總內存大小

 

# 查看物理CPU個數

cat  /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l

# 查看每一個物理CPU中core的個數(即核數)

cat /proc/cpuinfo| grep "cpu cores"| uniq

# 查看邏輯CPU的個數

cat /proc/cpuinfo| grep "processor"| wc -l

 

# C=CPU總核數 = 物理CPU個數 X 每顆物理CPU的核數

# 總邏輯CPU數 = 物理CPU個數 X 每顆物理CPU的核數 X 超線程數

 

# 查看CPU信息（型號）

cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

 

查看內存信息 

cat /proc/meminfo

出現
MemTotal:        3924384 kB
MemFree:         3245376 kB
Buffers:           46976 kB
Cached:           518592 kB
SwapCached:            0 kB
Active:           322948 kB
Inactive:         254560 kB
Active(anon):      11948 kB
Inactive(anon):      184 kB
Active(file):     311000 kB
Inactive(file):   254376 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:       2097148 kB
SwapFree:        2097148 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:         11944 kB
Mapped:             7572 kB
Shmem:               196 kB
Slab:              55920 kB
SReclaimable:      34876 kB
SUnreclaim:        21044 kB
KernelStack:         920 kB
PageTables:         1320 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     4059340 kB
Committed_AS:     101108 kB
VmallocTotal:   34359738367 kB
VmallocUsed:       20268 kB
VmallocChunk:   34359715628 kB
HardwareCorrupted:     0 kB
AnonHugePages:         0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        6016 kB
DirectMap2M:     2091008 kB
DirectMap1G:     2097152 kB
c2b-perf-b-4-[appuser@c2b-perf-b-4 ~]$

而後第一個數據MemTotal:        3924384 kB/1024/1024，從KB換算成MB最後到GB，約等於4G。

2G，4G，16G，32G對好比下：

MemTotal
kB	MB	GB
1922200	954.4190665	2
3924384	3832.40625	4
16333736	15950.91406	16
32879524	32108.91016	32