Linux procfs
内存
- meminfo
- slabinfo
- vmstat
- zoneinfo
- buddyinfo
/proc/meminfo
MemTotal: 3955012 kB #可用内存大小,物理内存减去一些预留与内核二进制代码大小
MemFree: 2068536 kB #为使用的内存大小.
MemAvailable: 2616712 kB
Buffers: 89828 kB
Cached: 674260 kB
SwapCached: 0 kB
Active: 1112724 kB
Inactive: 610856 kB
Active(anon): 960484 kB
Inactive(anon): 75084 kB
Active(file): 152240 kB
Inactive(file): 535772 kB
Unevictable: 16 kB
Mlocked: 16 kB
SwapTotal: 8178684 kB
SwapFree: 8178684 kB
Dirty: 16 kB
Writeback: 0 kB
AnonPages: 959548 kB
Mapped: 128668 kB
Shmem: 76072 kB
Slab: 90824 kB
SReclaimable: 58180 kB
SUnreclaim: 32644 kB
KernelStack: 3640 kB
PageTables: 26112 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 10156188 kB
Committed_AS: 3254572 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 575780 kB
VmallocChunk: 34359147064 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 76540 kB
DirectMap2M: 4014080 kB
/proc/swaps
Filename Type Size Used Priority
/dev/sda5 partition 8178684 0 -1
cpu与调度
/proc/cpuinfo
/proc/interrupts
/proc/stat
包含了系统启动后的统计信息
# user nice sys idle iowait irq sfirq steal guest
cpu 24058 26 5832 456366 32060 0 78 0 0 0 #各个cpu总的统计
cpu0 6831 4 1476 114318 6732 0 32 0 0 0 #每一个cpu单独的统计
cpu1 5837 8 1530 110794 11432 0 26 0 0 0
cpu2 7177 7 1775 112476 7998 0 13 0 0 0
cpu3 4212 6 1050 118776 5896 0 6 0 0 0
intr ... # 中断
ctxt 2497808 # 上下文切换次数
btime 1415795241 # 启动到现在的时间,秒
processes 4941 # 自启动以来创建的任务数
procs_running 5 # 当前运行队列的任务数
procs_blocked 0 # 被族塞的任务数
softirq 961758 16120 143581 42120 1476 30621 0 492301 59744 456 175339
/proc/uptime
#启动时间 空闲时间
1939.39 7066.73
IPC
/proc/locks
#NO 类型 xxx xxx PID 锁定的文件 开始区域 结束区域
主:次:inode
1: POSIX ADVISORY READ 4572 08:01:57672021 1073741826 1073742335
2: POSIX ADVISORY READ 4572 08:01:57672536 128 128
3: POSIX ADVISORY READ 4572 08:01:57671824 1073741826 1073742335
4: POSIX ADVISORY READ 4262 08:01:57672290 128 128
5: POSIX ADVISORY READ 4262 08:01:57671737 1073741826 1073742335
6: POSIX ADVISORY READ 4207 08:01:57672290 128 128
7: POSIX ADVISORY READ 4207 08:01:57671737 1073741826 1073742335
8: POSIX ADVISORY WRITE 4332 08:01:3670020 0 EOF
9: POSIX ADVISORY WRITE 2894 00:0f:12359 0 0
10: POSIX ADVISORY WRITE 2718 00:0f:12335 0 EOF
11: POSIX ADVISORY READ 4572 08:01:57672371 128 128
12: POSIX ADVISORY READ 4572 08:01:57671830 1073741826 1073742335
13: POSIX ADVISORY WRITE 4572 08:01:57671810 0 EOF
14: FLOCK ADVISORY WRITE 2762 00:0f:8057 0 EOF
15: POSIX ADVISORY READ 4572 08:01:57672724 128 128
16: POSIX ADVISORY READ 4572 08:01:57671855 1073741826 1073742335
磁盘
/proc/diskstats /proc/partitions硬盘分区信息
major minor #blocks name
8 0 976762584 sda
8 1 968581120 sda1
8 2 1 sda2
8 5 8178688 sda5
11 0 1048575 sr0
/proc/mounts
设备
/proc/devices
/proc/misc 杂项设备,主设备10上注册的设备
#次设备号 设备名
237 loop-control
130 watchdog
57 freefall
58 rfkill
59 mei
232 kvm
234 btrfs-control
236 device-mapper
60 network_throughput
61 network_latency
62 cpu_dma_latency
227 mcelog
1 psaux
228 hpet
231 snapshot
184 microcode
63 vga_arbiter
内核信息
- cmdline 内核启动参数
- modules
- sys 内核参数,可以进行调整
/proc/modules 加载的模块
...
mfd_core 12601 2 lpc_ich,rtsx_pci, Live 0xffffffffa0044000
...
usb_common 12440 1 usbcore, Live 0xffffffffa0000000
进程信息
进程
cwd指向当前进程的工作目录.cmdline启动当前进程的完整命令，但僵尸进程目录中的此文件不包含任何信息environ进程的环境变量exe指向当前进程二进制文件fd当前进程打开的文件.ls -l fd看一下fdinfo与fd对应,打开权限root进程的根目录limits进程限制task线程
cpu
内存
- statm
- stat
- status
- map
- smap
文件系统
- io