5个回答
33
从
man proc(5)中：
/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 speci‐
fiers, are listed below. Whether or not certain of these
fields display valid information is governed by a ptrace
access mode PTRACE_MODE_READ_FSCREDS | PTRACE_MODE_NOAUDIT
check (refer to ptrace(2)). If the check denies access, then
the field value is displayed as 0. The affected fields are
indicated with the marking [PT].
(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)
I Idle (Linux 4.14 onward)
(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 con‐
trolling terminal of the process.
(9) flags %u
The kernel flags word of the process. For bit mean‐
ings, 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 chil‐
dren 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 chil‐
dren 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 schedul‐
ing priority, minus one; that is, a number in the
range -2 to -100, corresponding to real-time priori‐
ties 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 ker‐
nel 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 [PT]
The address above which program text can run.
(27) endcode %lu [PT]
The address below which program text can run.
(28) startstack %lu [PT]
The address of the start (i.e., bottom) of the
stack.
(29) kstkesp %lu [PT]
The current value of ESP (stack pointer), as found
in the kernel stack page for the process.
(30) kstkeip %lu [PT]
The current EIP (instruction pointer).
(31) signal %lu
The bitmap of pending signals, displayed as a deci‐
mal 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 deci‐
mal 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 deci‐
mal 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 [PT]
This is the "channel" in which the process is wait‐
ing. 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 main‐
tained).
(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 vir‐
tual 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) [PT]
Address above which program initialized and unini‐
tialized (BSS) data are placed.
(46) end_data %lu (since Linux 3.3) [PT]
Address below which program initialized and unini‐
tialized (BSS) data are placed.
(47) start_brk %lu (since Linux 3.3) [PT]
Address above which program heap can be expanded
with brk(2).
(48) arg_start %lu (since Linux 3.5) [PT]
Address above which program command-line arguments
(argv) are placed.
(49) arg_end %lu (since Linux 3.5) [PT]
Address below program command-line arguments (argv)
are placed.
(50) env_start %lu (since Linux 3.5) [PT]
Address above which program environment is placed.
(51) env_end %lu (since Linux 3.5) [PT]
Address below which program environment is placed.
(52) exit_code %d (since Linux 3.5) [PT]
The thread's exit status in the form reported by
waitpid(2).
- Catskul
8
它的手册页面上有足够的信息。尝试阅读并查找其中的/proc/[pid]/stat。
man 5 proc
此外，您可以在以下链接中找到其在线手册：http://man7.org/linux/man-pages/man5/proc.5.html 打开链接并在页面上搜索此表达式：/proc/[pid]/stat 希望您能在那里找到答案！祝您有美好的一天！
- M. Javad Mohebbi
1
我发现很多依赖于/proc系统。我不知道PID统计信息。只是要注意。 - Taylor Kidd
7
你可以从这里获取所有的内容：http://brokestream.com/procstat.html，并查看以下说明：
int pid; /** The process id. **/
char exName [_POSIX_PATH_MAX]; /** The filename of the executable **/
char state; /** 1 **/ /** R is running, S is sleeping,
D is sleeping in an uninterruptible wait,
Z is zombie, T is traced or stopped **/
unsigned euid, /** effective user id **/
egid; /** effective group id */
int ppid; /** The pid of the parent. **/
int pgrp; /** The pgrp of the process. **/
int session; /** The session id of the process. **/
int tty; /** The tty the process uses **/
int tpgid; /** (too long) **/
unsigned int flags; /** The flags of the process. **/
unsigned int minflt; /** The number of minor faults **/
unsigned int cminflt; /** The number of minor faults with childs **/
unsigned int majflt; /** The number of major faults **/
unsigned int cmajflt; /** The number of major faults with childs **/
int utime; /** user mode jiffies **/
int stime; /** kernel mode jiffies **/
int cutime; /** user mode jiffies with childs **/
int cstime; /** kernel mode jiffies with childs **/
int counter; /** process's next timeslice **/
int priority; /** the standard nice value, plus fifteen **/
unsigned int timeout; /** The time in jiffies of the next timeout **/
unsigned int itrealvalue; /** The time before the next SIGALRM is sent to the process **/
int starttime; /** 20 **/ /** Time the process started after system boot **/
unsigned int vsize; /** Virtual memory size **/
unsigned int rss; /** Resident Set Size **/
unsigned int rlim; /** Current limit in bytes on the rss **/
unsigned int startcode; /** The address above which program text can run **/
unsigned int endcode; /** The address below which program text can run **/
unsigned int startstack; /** The address of the start of the stack **/
unsigned int kstkesp; /** The current value of ESP **/
unsigned int kstkeip; /** The current value of EIP **/
int signal; /** The bitmap of pending signals **/
int blocked; /** 30 **/ /** The bitmap of blocked signals **/
int sigignore; /** The bitmap of ignored signals **/
int sigcatch; /** The bitmap of catched signals **/
unsigned int wchan; /** 33 **/ /** (too long) **/
int sched, /** scheduler **/
sched_priority; /** scheduler priority **/
- Parveen Kumar
1
1只包含链接的答案将会在未来被删除，请在您的回答中附上代码及其解释。这是关于编程的内容。 - Jaimil Patel
1
正如man proc(5)所建议的那样，要查看状态列表的实际清单，您还可以查看内核源代码fs/proc/array.c：
static const char * const task_state_array[] = {
/* states in TASK_REPORT: */
"R (running)", /* 0x00 */
"S (sleeping)", /* 0x01 */
"D (disk sleep)", /* 0x02 */
"T (stopped)", /* 0x04 */
"t (tracing stop)", /* 0x08 */
"X (dead)", /* 0x10 */
"Z (zombie)", /* 0x20 */
"P (parked)", /* 0x40 */
/* states beyond TASK_REPORT: */
"I (idle)", /* 0x80 */
};
- pevik
1
注意：某些内核版本具有不同的状态。例如，以下每个版本都具有略微不同的状态：
- [v2.6.32（例如RHEL 6）]（https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/proc/array.c?h=v2.6.32#n136）
- [v3.10（例如RHEL7）]（https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/proc/array.c?h=v3.10#n135）
- [4.18（例如RHEL 8）]（https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/proc/array.c?h=v4.18#n130）
0
在我的情况下，我发现我的PID处于Sleep状态，这是正常的。我调用了一个脚本，该脚本再向内部函数发起请求，并在返回响应给我的脚本之前花费了几个小时。我看到我的主要PID一直处于睡眠状态，直到从该函数中获取响应（执行完毕）。
cat/proc/$pid/status可以告诉你$PID处于睡眠状态，但它不会告诉你原因。
谢谢。
cat/proc/$pid/status可以告诉你$PID处于睡眠状态，但它不会告诉你原因。
谢谢。
- vasu
网页内容由stack overflow 提供, 点击上面的可以查看英文原文，
原文链接
原文链接
- 相关问题
- 15 /proc/[pid]/pagemaps and /proc/[pid]/maps | linux
- 12 Linux操作系统：/proc/[pid]/smaps与/proc/[pid]/statm的区别
- 5 基本的文件缓冲区：在使用ifstream读取/proc/pid/stat文件时出现underflow错误。
- 12 使用/proc/[pid]/pagemap
- 3 /proc/pid/stat文件中的cstime错误
- 10 /proc/<pid>status中的SigIGN字段
- 8 从/proc/pid/stat中获取当前的堆栈指针
- 74 如何从/proc/pid/stat获取应用程序的总CPU使用率？
- 5 /proc/PID files' format
- 3 AlertDialog.Builder类有什么意义？
/proc/14344/stat中的第四个字段是父进程的pid。 - daparic/proc/[pid]/status可能更容易阅读，参见（https://man7.org/linux/man-pages/man5/proc.5.html） - mlvljr