출력되는 정보를 다음과 같은 순서로 해석하면 된다.
FLDNUM FMT ARG OUTPUT
1 %d task->pid 18173
2 (%s) task->comm (run-mozilla.sh)
3 %c state S
4 %d ppid 932
5 %d task->pgrp 18173
6 %d task->session 904
7 %d tty_nr 0
8 %d tty_pgrp -1
9 %lu task->flags 0
10 %lu task->min_flt 186
11 %lu task->cmin_flt 118
12 %lu task->maj_flt 483
13 %lu task->cmaj_flt 470
14 %lu task->times.tms_utime 0
15 %lu task->times.tms_stime 0
16 %ld task->times.tms_cutime 0
17 %ld task->times.tms_cstime 0
18 %ld priority 16
19 %ld nice 0
20 %ld 0UL /* removed */ 0
21 %ld task->it_real_value 0
22 %lu task->start_time 4755372
23 %lu vsize 2338816
24 %ld mm ? mm->rss : 0 /* you might want to shift this left 3 */ 220
25 %lu task->rlim[RLIMIT_RSS].rlim_cur 4294967295
26 %lu mm ? mm->start_code : 0 134512640
27 %lu mm ? mm->end_code : 0 135029780
28 %lu mm ? mm->start_stack : 0 3221224048
29 %lu esp 3221222148
30 %lu eip 1108035433
31 %lu task->pending.signal.sig[0] & 0x7fffffffUL 0
32 %lu task->blocked.sig[0] & 0x7fffffffUL 65536
33 %lu sigign.sig[0] & 0x7fffffffUL 4
34 %lu sigcatch.sig[0] & 0x7fffffffUL 65538
35 %lu wchan 3222384609
36 %lu task->nswap 0
37 %lu task->cnswap 0
38 %d task->exit_signal 17
39 %d task->cpu
FLDNUM FMT ARG OUTPUT
1 %d task->pid 18173
2 (%s) task->comm (run-mozilla.sh)
3 %c state S
4 %d ppid 932
5 %d task->pgrp 18173
6 %d task->session 904
7 %d tty_nr 0
8 %d tty_pgrp -1
9 %lu task->flags 0
10 %lu task->min_flt 186
11 %lu task->cmin_flt 118
12 %lu task->maj_flt 483
13 %lu task->cmaj_flt 470
14 %lu task->times.tms_utime 0
15 %lu task->times.tms_stime 0
16 %ld task->times.tms_cutime 0
17 %ld task->times.tms_cstime 0
18 %ld priority 16
19 %ld nice 0
20 %ld 0UL /* removed */ 0
21 %ld task->it_real_value 0
22 %lu task->start_time 4755372
23 %lu vsize 2338816
24 %ld mm ? mm->rss : 0 /* you might want to shift this left 3 */ 220
25 %lu task->rlim[RLIMIT_RSS].rlim_cur 4294967295
26 %lu mm ? mm->start_code : 0 134512640
27 %lu mm ? mm->end_code : 0 135029780
28 %lu mm ? mm->start_stack : 0 3221224048
29 %lu esp 3221222148
30 %lu eip 1108035433
31 %lu task->pending.signal.sig[0] & 0x7fffffffUL 0
32 %lu task->blocked.sig[0] & 0x7fffffffUL 65536
33 %lu sigign.sig[0] & 0x7fffffffUL 4
34 %lu sigcatch.sig[0] & 0x7fffffffUL 65538
35 %lu wchan 3222384609
36 %lu task->nswap 0
37 %lu task->cnswap 0
38 %d task->exit_signal 17
39 %d task->cpu
각 의미는 아래를 보자.
/proc/[pid]/stat
Status information about the process. This is used by ps(1).
It is defined in the kernel source file fs/proc/array.c.
The fields, in order, with their proper scanf(3) format
specifiers, are:
(1) pid %d
The process ID.
(2) comm %s
The filename of the executable, in parentheses.
This is visible whether or not the executable is
swapped out.
(3) state %c
One of the following characters, indicating process
state:
R Running
S Sleeping in an interruptible wait
D Waiting in uninterruptible disk sleep
Z Zombie
T Stopped (on a signal) or (before Linux 2.6.33)
trace stopped
t Tracing stop (Linux 2.6.33 onward)
W Paging (only before Linux 2.6.0)
X Dead (from Linux 2.6.0 onward)
x Dead (Linux 2.6.33 to 3.13 only)
K Wakekill (Linux 2.6.33 to 3.13 only)
W Waking (Linux 2.6.33 to 3.13 only)
P Parked (Linux 3.9 to 3.13 only)
(4) ppid %d
The PID of the parent of this process.
(5) pgrp %d
The process group ID of the process.
(6) session %d
The session ID of the process.
(7) tty_nr %d
The controlling terminal of the process. (The minor
device number is contained in the combination of
bits 31 to 20 and 7 to 0; the major device number is
in bits 15 to 8.)
(8) tpgid %d
The ID of the foreground process group of the
controlling terminal of the process.
(9) flags %u
The kernel flags word of the process. For bit
meanings, see the PF_* defines in the Linux kernel
source file include/linux/sched.h. Details depend
on the kernel version.
The format for this field was %lu before Linux 2.6.
(10) minflt %lu
The number of minor faults the process has made
which have not required loading a memory page from
disk.
(11) cminflt %lu
The number of minor faults that the process's
waited-for children have made.
(12) majflt %lu
The number of major faults the process has made
which have required loading a memory page from disk.
(13) cmajflt %lu
The number of major faults that the process's
waited-for children have made.
(14) utime %lu
Amount of time that this process has been scheduled
in user mode, measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)). This includes guest time,
guest_time (time spent running a virtual CPU, see
below), so that applications that are not aware of
the guest time field do not lose that time from
their calculations.
(15) stime %lu
Amount of time that this process has been scheduled
in kernel mode, measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)).
(16) cutime %ld
Amount of time that this process's waited-for
children have been scheduled in user mode, measured
in clock ticks (divide by sysconf(_SC_CLK_TCK)).
(See also times(2).) This includes guest time,
cguest_time (time spent running a virtual CPU, see
below).
(17) cstime %ld
Amount of time that this process's waited-for
children have been scheduled in kernel mode,
measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)).
(18) priority %ld
(Explanation for Linux 2.6) For processes running a
real-time scheduling policy (policy below; see
sched_setscheduler(2)), this is the negated
scheduling priority, minus one; that is, a number in
the range -2 to -100, corresponding to real-time
priorities 1 to 99. For processes running under a
non-real-time scheduling policy, this is the raw
nice value (setpriority(2)) as represented in the
kernel. The kernel stores nice values as numbers in
the range 0 (high) to 39 (low), corresponding to the
user-visible nice range of -20 to 19.
Before Linux 2.6, this was a scaled value based on
the scheduler weighting given to this process.
(19) nice %ld
The nice value (see setpriority(2)), a value in the
range 19 (low priority) to -20 (high priority).
(20) num_threads %ld
Number of threads in this process (since Linux 2.6).
Before kernel 2.6, this field was hard coded to 0 as
a placeholder for an earlier removed field.
(21) itrealvalue %ld
The time in jiffies before the next SIGALRM is sent
to the process due to an interval timer. Since
kernel 2.6.17, this field is no longer maintained,
and is hard coded as 0.
(22) starttime %llu
The time the process started after system boot. In
kernels before Linux 2.6, this value was expressed
in jiffies. Since Linux 2.6, the value is expressed
in clock ticks (divide by sysconf(_SC_CLK_TCK)).
The format for this field was %lu before Linux 2.6.
(23) vsize %lu
Virtual memory size in bytes.
(24) rss %ld
Resident Set Size: number of pages the process has
in real memory. This is just the pages which count
toward text, data, or stack space. This does not
include pages which have not been demand-loaded in,
or which are swapped out.
(25) rsslim %lu
Current soft limit in bytes on the rss of the
process; see the description of RLIMIT_RSS in
getrlimit(2).
(26) startcode %lu
The address above which program text can run.
(27) endcode %lu
The address below which program text can run.
(28) startstack %lu
The address of the start (i.e., bottom) of the
stack.
(29) kstkesp %lu
The current value of ESP (stack pointer), as found
in the kernel stack page for the process.
(30) kstkeip %lu
The current EIP (instruction pointer).
(31) signal %lu
The bitmap of pending signals, displayed as a
decimal number. Obsolete, because it does not
provide information on real-time signals; use
/proc/[pid]/status instead.
(32) blocked %lu
The bitmap of blocked signals, displayed as a
decimal number. Obsolete, because it does not
provide information on real-time signals; use
/proc/[pid]/status instead.
(33) sigignore %lu
The bitmap of ignored signals, displayed as a
decimal number. Obsolete, because it does not
provide information on real-time signals; use
/proc/[pid]/status instead.
(34) sigcatch %lu
The bitmap of caught signals, displayed as a decimal
number. Obsolete, because it does not provide
information on real-time signals; use
/proc/[pid]/status instead.
(35) wchan %lu
This is the "channel" in which the process is
waiting. It is the address of a location in the
kernel where the process is sleeping. The
corresponding symbolic name can be found in
/proc/[pid]/wchan.
(36) nswap %lu
Number of pages swapped (not maintained).
(37) cnswap %lu
Cumulative nswap for child processes (not
maintained).
(38) exit_signal %d (since Linux 2.1.22)
Signal to be sent to parent when we die.
(39) processor %d (since Linux 2.2.8)
CPU number last executed on.
(40) rt_priority %u (since Linux 2.5.19)
Real-time scheduling priority, a number in the range
1 to 99 for processes scheduled under a real-time
policy, or 0, for non-real-time processes (see
sched_setscheduler(2)).
(41) policy %u (since Linux 2.5.19)
Scheduling policy (see sched_setscheduler(2)).
Decode using the SCHED_* constants in linux/sched.h.
The format for this field was %lu before Linux
2.6.22.
(42) delayacct_blkio_ticks %llu (since Linux 2.6.18)
Aggregated block I/O delays, measured in clock ticks
(centiseconds).
(43) guest_time %lu (since Linux 2.6.24)
Guest time of the process (time spent running a
virtual CPU for a guest operating system), measured
in clock ticks (divide by sysconf(_SC_CLK_TCK)).
(44) cguest_time %ld (since Linux 2.6.24)
Guest time of the process's children, measured in
clock ticks (divide by sysconf(_SC_CLK_TCK)).
(45) start_data %lu (since Linux 3.3)
Address above which program initialized and
uninitialized (BSS) data are placed.
(46) end_data %lu (since Linux 3.3)
Address below which program initialized and
uninitialized (BSS) data are placed.
(47) start_brk %lu (since Linux 3.3)
Address above which program heap can be expanded
with brk(2).
(48) arg_start %lu (since Linux 3.5)
Address above which program command-line arguments
(argv) are placed.
(49) arg_end %lu (since Linux 3.5)
Address below program command-line arguments (argv)
are placed.
(50) env_start %lu (since Linux 3.5)
Address above which program environment is placed.
(51) env_end %lu (since Linux 3.5)
Address below which program environment is placed.
(52) exit_code %d (since Linux 3.5)
The thread's exit status in the form reported by
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