oracular (5) proc_stat.5.gz

NAME

       /proc/stat - kernel system statistics

DESCRIPTION

       /proc/stat
              kernel/system statistics.  Varies with architecture.  Common entries include:

              cpu 10132153 290696 3084719 46828483 16683 0 25195 0 175628 0
              cpu0 1393280 32966 572056 13343292 6130 0 17875 0 23933 0
                     The  amount  of  time,  measured  in  units  of  USER_HZ  (1/100ths  of  a  second  on most
                     architectures, use sysconf(_SC_CLK_TCK) to obtain the right value), that the system  ("cpu"
                     line) or the specific CPU ("cpuN" line) spent in various states:

                     user   (1) Time spent in user mode.

                     nice   (2) Time spent in user mode with low priority (nice).

                     system (3) Time spent in system mode.

                     idle   (4)  Time  spent  in  the  idle task.  This value should be USER_HZ times the second
                            entry in the /proc/uptime pseudo-file.

                     iowait (since Linux 2.5.41)
                            (5) Time waiting for I/O to complete.  This value is not reliable, for the following
                            reasons:

                            •  The  CPU  will  not  wait  for I/O to complete; iowait is the time that a task is
                               waiting for I/O to complete.  When a CPU goes into  idle  state  for  outstanding
                               task I/O, another task will be scheduled on this CPU.

                            •  On  a  multi-core CPU, the task waiting for I/O to complete is not running on any
                               CPU, so the iowait of each CPU is difficult to calculate.

                            •  The value in this field may decrease in certain conditions.

                     irq (since Linux 2.6.0)
                            (6) Time servicing interrupts.

                     softirq (since Linux 2.6.0)
                            (7) Time servicing softirqs.

                     steal (since Linux 2.6.11)
                            (8) Stolen time, which is the time spent in other operating systems when running  in
                            a virtualized environment

                     guest (since Linux 2.6.24)
                            (9)  Time  spent running a virtual CPU for guest operating systems under the control
                            of the Linux kernel.

                     guest_nice (since Linux 2.6.33)
                            (10) Time spent running a niced guest (virtual CPU for guest operating systems under
                            the control of the Linux kernel).

              page 5741 1808
                     The number of pages the system paged in and the number that were paged out (from disk).

              swap 1 0
                     The number of swap pages that have been brought in and out.

              intr 1462898
                     This  line  shows  counts  of interrupts serviced since boot time, for each of the possible
                     system interrupts.  The first column is the total  of  all  interrupts  serviced  including
                     unnumbered  architecture  specific interrupts; each subsequent column is the total for that
                     particular numbered interrupt.  Unnumbered interrupts are not shown, only summed  into  the
                     total.

              disk_io: (2,0):(31,30,5764,1,2) (3,0):...
                     (major,disk_idx):(noinfo, read_io_ops, blks_read, write_io_ops, blks_written)
                     (Linux 2.4 only)

              ctxt 115315
                     The number of context switches that the system underwent.

              btime 769041601
                     boot time, in seconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC).

              processes 86031
                     Number of forks since boot.

              procs_running 6
                     Number of processes in runnable state.  (Linux 2.5.45 onward.)

              procs_blocked 2
                     Number of processes blocked waiting for I/O to complete.  (Linux 2.5.45 onward.)

              softirq 229245889 94 60001584 13619 5175704 2471304 28 51212741 59130143 0 51240672
                     This  line  shows the number of softirq for all CPUs.  The first column is the total of all
                     softirqs and each subsequent column is the total for  particular  softirq.   (Linux  2.6.31
                     onward.)

SEE ALSO

       proc(5)