2007년 12월 5일 수요일

Linux /proc/pid/stat 구조

Linux 2.6 / 출처: http://linux.die.net/man/5/proc
ㅡ_-) 중간에 쓰이지 않는 '0' 필드가 있으니 주의!!!
pid %d
    The process ID.

comm %s
    The filename of the executable, in parentheses. This is visible whether or not the executable is swapped out.

state %c
    One character from the string "RSDZTW" where R is running, S is sleeping in an interruptible wait, D is waiting in uninterruptible disk sleep, Z is zombie, T is traced or stopped (on a signal), and W is paging.

ppid %d
    The PID of the parent.

pgrp %d
    The process group ID of the process.

session %d
    The session ID of the process.

tty_nr %d
    The tty the process uses.

tpgid %d
    The process group ID of the process which currently owns the tty that the process is connected to.

flags %lu
    The kernel flags word of the process. For bit meanings, see the PF_* defines in <linux/sched.h>. Details depend on the kernel version.

minflt %lu
    The number of minor faults the process has made which have not required loading a memory page from disk.

cminflt %lu
    The number of minor faults that the process's waited-for children have made.

majflt %lu
    The number of major faults the process has made which have required loading a memory page from disk.

cmajflt %lu
    The number of major faults that the process's waited-for children have made.

utime %lu
    The number of jiffies that this process has been scheduled in user mode.

stime %lu
    The number of jiffies that this process has been scheduled in kernel mode.

cutime %ld
    The number of jiffies that this process's waited-for children have been scheduled in user mode. (See also times(2).)

cstime %ld
    The number of jiffies that this process's waited-for children have been scheduled in kernel mode.

priority %ld
    The standard nice value, plus fifteen. The value is never negative in the kernel.

nice %ld
    The nice value ranges from 19 (nicest) to -19 (not nice to others).

0 %ld
    This value is hard coded to 0 as a placeholder for a removed field.

itrealvalue %ld
    The time in jiffies before the next SIGALRM is sent to the process due to an interval timer.

starttime %lu
    The time in jiffies the process started after system boot.

vsize %lu
    Virtual memory size in bytes.

rss %ld
    Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes. This is just the pages which count towards text, data, or stack space. This does not include pages which have not been demand-loaded in, or which are swapped out.

rlim %lu
    Current limit in bytes on the rss of the process (usually 4294967295 on i386).

startcode %lu
    The address above which program text can run.

endcode %lu
    The address below which program text can run.

startstack %lu
    The address of the start of the stack.

kstkesp %lu
    The current value of esp (stack pointer), as found in the kernel stack page for the process.

kstkeip %lu
    The current EIP (instruction pointer).

signal %lu
    The bitmap of pending signals.

blocked %lu
    The bitmap of blocked signals.

sigignore %lu
    The bitmap of ignored signals.

sigcatch %lu
    The bitmap of caught signals.

wchan %lu
    This is the "channel" in which the process is waiting. It is the address of a system call, and can be looked up in a namelist if you need a textual name. (If you have an up-to-date /etc/psdatabase, then try ps -l to see the WCHAN field in action.)

nswap %lu
    Number of pages swapped (not maintained).

cnswap %lu
    Cumulative nswap for child processes (not maintained).

exit_signal %d
    Signal to be sent to parent when we die.

processor %d
    CPU number last executed on.

rt_priority %lu (since kernel 2.5.19)
    Real-time scheduling priority (see sched_setscheduler(2)).

policy %lu (since kernel 2.5.19)
    Scheduling policy (see sched_setscheduler(2)).


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