Re: Maximum possible traffic rate

[sajal <s.b...@qu...>]

On 06/10/10 18:25, Robert Iakobashvili wrote:
> Hi,
>
> On Wed, Oct 6, 2010 at 8:27 AM, sajal <s.b...@qu... 
> <mailto:s.b...@qu...>> wrote:
>
>     Hi,
>
>     I am using curl-loader on a physical machine with following
>     specifications: Intel Core 2 duo 3.0 GHz processor, 4 GB Memory and
>     running Linux 2.6.32
>
>     The configuration file being used is the following:
>     ########### GENERAL SECTION ################################
>     BATCH_NAME = 100
>     CLIENTS_NUM_MAX = 10000
>
>
> Try some 3000-5000 to begin with
>
>     CLIENTS_NUM_START = 1000
>
>
> Start from some 100-200
>
>     CLIENTS_RAMPUP_INC = 1000
>
>
> keep 50-200
>
>     INTERFACE = eth0
>     NETMASK = 8
>     IP_ADDR_MIN= 10.1.0.1
>     IP_ADDR_MAX= 10.2.255.255  #Actually - this is for self-control
>     CYCLES_NUM= 1
>
>
> You mean -1 or some high number?
>
> Use
> CYCLES_NUM= -1
>
>     URLS_NUM=1
>     ########### URL SECTION ####################################
>
>     URL=http://192.168.100.8/index.html
>     URL_SHORT_NAME="local-index"
>     REQUEST_TYPE=GET
>     FRESH_CONNECT=1
>
>
> Remove the tag FRESH_CONNECT=1
>
>     TIMER_URL_COMPLETION =0      # In msec. When positive, Now it is
>     enforced by cancelling url fetch on timeout
>     TIMER_AFTER_URL_SLEEP =0
>
>     With this configuration file I am able to get approximately 130 new
>     connections/second and the data-rate is somewhere 30-35 kbps. I wanted
>     to know with this configuration and available resources what is the
>     maximum possible no. of new connections/second and data-rate I can
>     get?
>
>
> Monitor your server-side, where it may be the bottleneck,
> after you place the correct tags with values.
>
> Read:
>
> http://curl-loader.sourceforge.net/high-load-hw 
> <http://curl-loader.sourceforge.net/high-load-hw/>
>
> and read more the README, other files in docs directory and the links 
> sent to you.
>
>
>     Thanks and Regards
>
>     --
>
>     Sajal Bhatia
>     Research Masters Student
>     QUT, Brisbane
>     AUSTRALIA
>
>
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>
> -- 
> Truly,
> Robert Iakobashvili, Ph.D.
>
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Hi,

Thanks for your reply. I tried with the suggested configuration i.e.
CLIENTS_NUM_START = 100
CLIENTS_RAMPUP_INC = 150
CYCLES_NUM= -1
FRESH_CONNECT=0

I ran the test for approx 100 sec and I was able to achieve ~3000 
packets per second, and with average packet size of 96 bytes, the data 
rate was ~2.21 mega bits per sec.

I also monitored the server side, it was like ~40% CPU usage. The client 
machine has consumed almost entire CPU (dual core). But the memory 
utilization on client machine was comparatively less ~15-20%.

Can you suggest the configuration to get a much higher load than this in 
terms of no of packets per second and data rate?

Thanks and Regards


-- 

Sajal Bhatia
Research Masters Student
QUT, Brisbane
AUSTRALIA