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.