You can display network performance information using a number
of the tools available through NETTOOL.
LOOPINIT, RESOURCE MONITOR,
and XPPERF all
provide performance monitoring features.
To Monitor Round Trip Response Time |
 |
The LOOPINIT
tool allows you to send a series of packets to a specific remote
node and display the minimum, maximum, and average times required
for the packets to complete the round trip. Chapter 6 “Using NETTOOL ” includes step-by-step
instructions for running LOOPINIT.
To Monitor Resource Usage |
|
The RESOURCE MONITOR
tool allows you to display the current usage of specified resources.
This is useful in situations where you suspect over-utilization
of a resource.
This tool provides two types of displays: the one-line (non-verbose)
display and the detailed (verbose) display. The one-line format
lists current use of resources, the maximum experienced (high-water
mark), and the maximum allowable usage for specified resources.
See the following example.
The verbose mode displays information about a particular item,
providing an interpretation of resource usage and pointing to possible
relationships with configurable parameters.
To Get a One-Line Display
Perform the following steps produce a resource display in
non-verbose mode.
Run NETTOOL
by entering the program name at the MPE prompt:
NETTOOL.NET.SYS
The root menu will appear.
Select the RESOURCE MONITOR
tool from the main menu by entering the RESOURCE
command. A new menu will appear.
Enter DISPLAY
to display resource usage. The tool will produce a table similar
to the following:
THU, MAR 12, 1992, 9:23:39 AM
Item Subsystem Name G/N Description Used High Max
1 NS XPORT TCP_CNTL (G) Control Buf Pool 0 0 120 :)
2 NS XPORT CP_POOL_ (G) Control Buf Pool 0 7 256 :)
3 NS XPORT 1088____ (G) Control Buf Pool 5 15 240 :)
4 NS XPORT ROUTER__ (N) Control Buf Pool 0 7 128 :)
5 NS XPORT ROUTER__ (N) Control Buf Pool 0 0 30 :) 6 NS XPORT ROUTER__ (N) Control Buf Pool 0 0 20 :) 7 NS XPORT GPROT (G) Control Buf Pool 525 N/A 523 :) 8 NS XPORT TCP_SIP (G) Control Buf Pool 616 N/A 616 :) 9 NS XPORT UDP (G) Control Buf Pool 50 N/A 512 :) 10 NS XPORT TCP_PM (G) Control Buf Pool 33 N/A 2048 :) 11 NS XPORT ROUTER__ (G) Control Buf Pool 680 N/A 680 :) 12 NS XPORT IP_NI (G) Control Buf Pool 50 N/A 2048 :)
13 NS XPORT IP_NI (G) Control Buf Pool 50 N/A 512 :)
14 NS XPORT (G) Control Buf Pool 1 N/A 1024 :)
15 NS XPORT (G) Control Buf Pool 9 N/A 360 :)
16 NS XPORT (G) Control Buf Pool 1 N/A 611 :)
[4]RESOURCE>> |
The column after the maximum allowable usage is an indication
of actual usage that may point to over-utilization of a resource.
The ":(" indicates normal usage, and the ":)"
indicates possible overutilization of a resource. In this example,
item 7 shows an indication of overutilization. You could use the
verbose mode to obtain a detailed display of that item's
resource usage.
To Get a Detailed Display
While still in the RESOURCE
menu, enter detail
to toggle the setting of this switch to the detailed mode.
Enter ITEM.
This will allow you to select the item from the one-line list that
you want to display.
Enter the item number. For example, you would enter
the number 7 to display item #7. RESOURCE MONITOR
will produce the detailed display.
To Measure Network Performance |
|
You can measure the performance of various aspects of the
network, such as the TCP/IP protocol stack, the UDP/IP protocol
stack, or X.25 level 3 direct access, using the XPPERF
tool. This tool runs by itself or as one of the NETTOOL
tools. See Chapter 6 “Using NETTOOL ” for
instructions on running this tool using the NETTOOL
interface.
