[En-Nut-Discussion] Heave load will harm the system?

[ivesworking]

i want to say sorry here, yesterday i remotely doing stress test,
after investigate, I found that my system have some memory leak problem when 
the system under stress test,
the stress test was done by repeat loading a same webpage,
there are two page that I did the test,
1st one are normal CGI page that have around 600Byte,    25Pages/second
2nd one are XML Page that Phrase a Web Page to XML, around 2000Byte, 
5Pages/Second

the stress test are loaded by 20 concurrent connection to repeat loading the 
page for a few min,

To know the CPU is Loaded or not, I feel it with my eyes from the LCD 
Display,
because I run another thread to update the LCD every second running under 
lower priority,

for the first CGI page, the thread still able to update the time,
for the second one the LCD are not be update during the stress test,

for a lot of connect/disconnection, i prove that it will not harm the 
system, since i able to estabilish 7693 connect/disconnect in 5 min, and the 
system still remain stable.

i believe that when the system under heave load, some of the memory are not 
able to free due to some problem.




Wfloh

P/S: i using Charon2, with  Nut OS v3.4.3
P/S2 : actually i able to crash the system within 1 min,
with repeatly loading one file that come from the original Nut OS standard 
httpd without modification,
P/S3 : the software i use to test is WAPT 4.0 unregistered version, (i just 
install, and have 29 days left for try period)




----- Original Message ----- 
From: "Harald Kipp" <harald.kipp at egnite.de>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Wednesday, March 01, 2006 8:52 AM
Subject: Re: [En-Nut-Discussion] Heave load will harm the system?


> At 21:17 28.02.2006 +0000, you wrote:
>
>>i believe last time the system hang cause by a suddent memory drop, and 
>>not able to recover from that drop,
>>however when i redo the test, it seem everything just fine.
>
> After several reports with systems hanging, I'm a little
> bit alarmed. Let's see what we have:
>
> 1. As far as I can say, most users experienced problems with HTTP.
>    Several use the original httpd sample with "minor" changes.
>
> 2. A few reported problems without HTTP. May be they do a lot
>    of TCP connect/disconnect cycles?
>
> 3. Some users reported problems with large networks. Unfortunately
>    no simple test application is available.
>
> 4. Several very complex applications are running without problems
>    for months. I assume, that most of them use long lasting
>    connect times (compared to HTTP).
>
> 5. No one reported low memory situations and Michael's tests
>    with ARP flooding additionally proofed, that the APR cache
>    doesn't seem to cause any problem.
>
> 6. Some reported problems after upgrading from 3.4 or earlier.
>    Again the applications are complex and the problem may be
>    caused by different stack usage.
>
> Please correct me, if I'm wrong.
>
> Harald
>
> _______________________________________________
> En-Nut-Discussion mailing list
> En-Nut-Discussion at egnite.de
> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion
>