SYSMON(8) System Manager's Manual SYSMON(8)NAME
sysmon, stats - display graphs of system activity
SYNOPSIS
sysmon [ machine [ -option ] ]
stats [ -option ]
DESCRIPTION
Sysmon displays a rolling graph of various statistics collected by the operating system. The statistics may be from a remote machine. A
sample value is taken once per second. The number in the top left corner of the graph gives the peak value for the duration of the graph.
Lines across the graph represent 75%, 50%, and 25% of the peak value. Clicking a mouse button anywhere in the window cycles through the
list of parameters to monitor; an option letter sets the initial choice. The option letters and parameters are:
[m] mem
total pages of active memory. The memory is displayed as a fraction of the machine's total memory.
[e] ether
number of packets sent and received per second.
[w] swap
number of valid pages on the swap device. The swap is displayed as a fraction of the number of swap pages configured by the
machine.
[c] contxt
number of process context switches per second.
[i] intr
number of interrupts per second.
[f] fault
number of memory faults per second.
[t] tlbmiss
number of translation look-aside buffer misses per second.
[p] tlbpurge
number of translation lookaside buffer flushes per second.
[l] load
system load average. The load is computed as a running average of the number of processes ready to run multiplied by 1000 to give
some precision.
The stats program is invoked by sysmon to display the graph.
FILES
/net/*/[0-n]/stats
#c/sysstat
SOURCE
/rc/bin/sysmon
/sys/src/cmd/stats.c
BUGS
Some machines do not have TLB hardware.
SYSMON(8)
Check Out this Related Man Page
PROCINFO-NG(8) Linux System Manual PROCINFO-NG(8)NAME
procinfo - display system statistics gathered from /proc
SYNOPSIS
procinfo [ -fdDSbrhv ] [ -nN ]
DESCRIPTION
procinfo gathers some system data from the /proc directory and prints it nicely formatted on the standard output device.
The meanings of the fields are as follows:
Memory:
See the man page for free(1)
Bootup:
The time the system was booted.
Load average:
The average number of jobs running, followed by the number of runnable processes and the total number of processes, followed by the
PID of the last process run. The pid of the last running process will probably always be procinfo's PID.
user: The amount of time spent running jobs in user space.
nice: The amount of time spent running niced jobs in user space.
system:
The amount of time spent running in kernel space. Note: the time spent servicing interrupts is not counted by the kernel (and noth-
ing that procinfo can do about it).
idle: The amount of time spent doing nothing.
uptime:
The time that the system has been up. The above four should more or less add up to this one.
page in:
The number of disk blocks paged into core from disk. 1 block is equal to 1 kiB.
page out:
The number of disk blocks paged out of core to disk. This includes regular disk-writes.
swap in:
The number of memory pages paged in from swap.
swap out:
The number of memory pages paged out to swap.
context:
The number of context switches, either since bootup or per interval.
Disk stats(hda, hdb, sda, sdb):
The number of reads and writes made to disks, whether CD-ROM, hard-drive, or USB. Shows all disks if they either are an hdX or sdX,
or if they have a non-zero read/write count.
Interrupts:
Number of interrupts serviced since boot, or per interval, listed per IRQ.
OPTIONS -nN Pause N second between updates. This option implies -f. It may contain a decimal point. The default is 5 seconds. When run by root
with a pause of 0 seconds, the program will run at the highest possible priority level.
-d For memory, CPU times, paging, swapping, disk, context and interrupt stats, display values per second rather than totals. This
option implies -f.
-D Same as -d, except that memory stats are displayed as totals.
-S When running with -d or -D, always show values per second, even when running with -n N with N greater than one second.
-b Display numbers of bytes rather than number of I/O requests.
-r This option adds an extra line to the memory info showing 'real' free memory, just as free(1) does. The numbers produced assume that
Buffers and Cache are disposable.
-H Displays memory stats in 'Human' (base 1024) numbers (KiB, MiB, GiB), instead of implied KBytes.
-h Print a brief help message.
-v Print version info.
INTERACTIVE COMMANDS
When running procinfo fullscreen, you can change its behaviour by pressing d, D, S, r and b, which toggle the flags that correspond to
their same-named commandline-options. In addition you can press q which quits the program.
FILES
/proc The proc file system.
BUGS
All of these statistics are taken verbatim from the kernel, without any scaling. Any case where the kernel specifies that a particular
field means something different from how it is documented in this man-page, the kernel always wins.
Some features of the original procinfo were elided, as they were considered non-useful, especially as many of them don't change anymore,
and have better utilities for listing/displaying them.
SEE ALSO free(1), uptime(1), w(1), init(8), proc(5).
AUTHOR
Adam Schrotenboer <adam@tabris.net>
v2.0 2007-05-05 PROCINFO-NG(8)