NAMEoview - visualize the performance of an Origin server
SYNOPSISoview [-Vw] [pmview+ options | oview4sn0 options]
DESCRIPTIONoview displays the topology of an Origin server with performance
information about CPUs, nodes and routers. The display is updated with
new values retrieved from the target host or archive every interval
seconds (default is 2 seconds).
oview behaves differently and produces different views for SGI 3000 and
SGI 2000 systems. For SGI 3000 systems oview constructs the view
configuration and launches pmview+. In the SGI 2000 case oview parses the
command line and launches oview4sn0.
The rest of this document discusses the the first case, i.e displaying
information about SGI 3000 systems. See oview4sn0(1) for details about
displaying data from SGI 2000 systems.
oview generates a pmview+(1) configuration file, and passes most command
line options to pmview+(1). Therefore, the command line options -A, -a,
-C, -h, -n, -O, -p, -S, -t, -T, -Z and -z, the X11-args and user
interface are described in the pmview+(1) man page.
oview can display the topology of SGI 3000 systems with up to eight
routers, which covers systems with 1 to 128 CPUs. Configurations with
metarouters and repeater routers are currently not supported.
COMMAND LINE OPTIONS
There are two oview specific options. If -V is present, the
configuration file is printed on the standard output and pmview+ is not
executed. If -w is present and an SGI 3000 system is being monitored,
then the ``wait'' time is included for each processor (the default is to
display only the ``user'' and ``system'' components of the CPU time).
All other options are passed either to pmview+(1) or to oview4sn0(1).
VISUALIZATION
Routers are represented by oblong boxes with a colored indicator of the
router's utilization on the top of the box. The color of the indicator
has the following meaning:
cyan insignificant router utilization
0 <= utilization < 1%
light cyan
light router utilization
1% <= utilization < 5%
yellow
medium router utilization
5% <= utilization < 20%
orange
high router utilization
20% <= utilization < 40%
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red saturated router utilization
utilization >= 40%
Nodes are represented by square boxes and CPUs are represented by a
stacks of blue, red and cyan colored blocks to show the user, system and
wait (if -w specified) utilization of each CPU, respectively. The CPU
stacks are grouped to appear on the top of the node they are physically
connected to.
Router ports are represented by cylindrical stacks, connected to the
sides of a router box. The topology of the connection depends on the
configuration of a machine. The router port stack shows the receive
bypass and the receive queued utilization on the per-port basis as violet
and yellow bands, respectively, which grow away from the router box as
utilization increase. A grey cylinder adjacent to the colored bands, if
visible, represents the unused bandwidth capacity.
Unanimated ``pipes'' are used to join the endpoints for each router
connection.
To avoid cluttering the scene, especially for large configuration, CPUs
and nodes may be omitted from the view. The -l option can be used to
select the ``level of details'' as follows:
0 Show only routers.
1 Show routers and nodes.
2 Show all the routers, nodes and CPUs. This is the default.
FILES
$PCP_VAR_DIR/config/pmlogger/config.oview
A pmlogger(1) configuration file for oview metrics.
PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the
file and directory names used by PCP. On each installation, the file
/etc/pcp.conf contains the local values for these variables. The
$PCP_CONF variable may be used to specify an alternative configuration
file, as described in pcp.conf(4).
SEE ALSOoview4sn0(1), pmcd(1), pmchart(1), pmlogger(1), pmtime(1) and pmview+(1).
CAVEATS
The algorithm for 3-D layout of SGI 3000 system components by oview is
complex, and relies on heuristics. If you encounter a configuration that
is not displayed as expected, please send e-mail to pcp-info@sgi.com
including a description of the problem, and attaching the output from
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pminfo -f hinv
There are may be problems when oview cannot guess the information about
routers connectivity in the non-standard SGI 3000 configuration. In this
case router ports would be displayed but no attempt is made to draw the
links between them.
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