Re: Curl-loader results vary from time to time

[Robert I. <cor...@gm...>]

Hi Alo Sinnathamby,

On Wed, Oct 29, 2008 at 10:04 PM, alo sinnathamby
<asi...@ic...>wrote:

> Dear support team,
>
> CURL-LOADER VERSION: 0.46
>
> HW DETAILS: CPU/S and memory are must:
>            x86_64 x86_64 x86_64 GNU/Linux
>            OS:    CentOS release 5.2 (Final)
>            CPU:    Intel(R) Core(TM)2 Duo CPU     E4600  @ 2.40GHz
>            Ram:    2 Gigabytes DDR2
>
> LINUX DISTRIBUTION and KERNEL (uname -r):   CentOS release 5.2 (Final)
>
> GCC VERSION (gcc -v):
>
> COMPILATION AND MAKING OPTIONS (if defaults changed):
>
> COMMAND-LINE:
>
> CONFIGURATION-FILE (The most common source of problems):
> Place the file inline here:
>
Thank you for PRF.

You missed to place your configuration file, wich
is essential for any judgement,


>
>
> QUESTION/ SUGGESTION/ PATCH:
>
> I have installed curl-loader on a testing client machine. i tried to
> test a home page of a website which is running with tomcat. the tomcat
> server system is:
> x86_64 x86_64 x86_64 GNU/Linux
> Operating System:      CentOS release 5 (Final)
> CPU:           Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
> Ram:           4 Gigabytes DDR2
>
> when i run 10 000 requests at different time intervals, i am getting
> different results as given below,
>
> 10 000 - run1
> ===============
> Test total duration was 202 seconds and CAPS average 97:
> H/F
>
> Req:10000,1xx:0,2xx:9993,3xx:0,4xx:0,5xx:7,Err:0,T-Err:0,D:111ms,D-2xx:111ms,Ti:280361B/s,To:7425B/s
> H/F/S
>
> Req:0,1xx:0,2xx:0,3xx:0,4xx:0,5xx:0,Err:0,T-Err:0,D:0ms,D-2xx:0ms,Ti:0B/s,To:0B/s
>  Operations:             Success                 Failed
> Timed out
> URL0:Login-GET          150    9993             0      7
> 0      0
>
>
> 10 000 - run2
> ==============
> Test total duration was 234 seconds and CAPS average 85:
> H/F
>
> Req:9773,1xx:0,2xx:9773,3xx:0,4xx:0,5xx:0,Err:227,T-Err:0,D:861ms,D-2xx:861ms,Ti:236413B/s,To:6264B/s
> H/F/S
>
> Req:0,1xx:0,2xx:0,3xx:0,4xx:0,5xx:0,Err:0,T-Err:0,D:0ms,D-2xx:0ms,Ti:0B/s,To:0B/s
>  Operations:             Success                 Failed
> Timed out
> URL0:Login-GET          7      9773             0      227
> 0      0
>
>
> 10 000 - run3
> ==============
> Test total duration was 318 seconds and CAPS average 62:
> H/F
>
> Req:6183,1xx:0,2xx:6012,3xx:0,4xx:0,5xx:0,Err:3988,T-Err:0,D:6602ms,D-2xx:6602ms,Ti:106771B/s,To:2916B/s
> H/F/S
>
> Req:0,1xx:0,2xx:0,3xx:0,4xx:0,5xx:0,Err:0,T-Err:0,D:0ms,D-2xx:0ms,Ti:0B/s,To:0B/s
>  Operations:             Success                 Failed
> Timed out
> URL0:Login-GET          0      6012             3      3988
> 0      0
>
>
> Could you please let us know as how to fine tune it to get a consistent
> result. FYI: both the client and server are in the local network.
>

I can only guess without the configuration file, that your server
works really hard. Please, monitor the server-side performance.

The reasons for errors could be seen in the log file.
Please look into the <your-name>.log file.

You can see at the reasons of errors, when adding to the command line -v.
Most probably, your server gets saturated and does not handle
TCP-connections.


You can also try to recompile curl-loader with optimization and add more
mem for TCP, file descriptors like here:
http://curl-loader.sourceforge.net/doc/faq.html

in the 7.2. How to run a really big load?

Please, update me about your advances.


>
> --
> Truly,
> Robert Iakobashvili, Ph.D.
> ......................................................................
> Assistive technology that understands you
> ......................................................................
>