NDT-DEV email list created

Status: New
Owner: ----
Labels: Type-Defect Severity-Medium

New issue 44 by sekharnv73: CPU Performance Issue
http://code.google.com/p/ndt/issues/detail?id=44

What steps will reproduce the problem?

1.Run the Web100 server.
2.Run the script to log Memory usage in the server.
2.Set the Bandwidth to 100mbit (10 clients X 10 Mbit) in 2 clietns systems.
3.Run the script to invoke NDT clients with parameters 10 number of clients
and the server address in both client systems to simulate 20 clietns.
4.Monitor the clients execution
5.After completion of the test check the log files created to verify that
all clients are completed the test successfully.
6.Check the CPU usage


What is the expected output? What do you see instead?
CPU usage during Middlebox testing is some times more (70% to 100%). It is
observed peak CPU usage during middlebox testing during performance
testing. This is not occuring everytime.
During other tests of the server CPU usage is not more (less then 25% for
the load 20 clients each having 25mbits bandwith).

What version of the product are you using? On what operating system?
NDT server 3.6.1
Clients : Linux (Ubuntu 9)


Please provide any additional information below.

CPU usage during test run with 20 clients with 10mbps bandwidth to each  
client

Time    CPU usage (%)   Test Stage
1       0               Stat
2       1       
3       0       
4       89              Middle Box Testing
5       94      
6       100     
7       100     
8       98      
9       91      
10      91      
11      1               Firewall Testing
12      0       
13      4               C2S Testing
14      5       
15      3       
16      9       
17      10      
18      10      
19      12      
20      13      
21      9       
22      11      
23      13      
24      15      
25      22      
26      10              S2C Testing
27      4       
28      1       
29      17      
30      28      
31      2       
32      2       
33      11      
34      11      
35      17      
36      18      
37      2       
38      0       
39      0       
40      4       


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