Thanks for your reply! The machine is not loaded very much (CPU load
below 30%) . ANY network traffic, which is not even directed to the
server process on the machine will cause the problem, eg. just a copy
operation which copies the Linux kernel source from a SMB server to the
local disk.
The application program has established the socket connection. 'bind'
has completed without problems. It is then running in a loop where it
calls 'select' to wait for new data, reads the data if any is available,
processes it and then repeats these steps.
Bye,
Jürgen
Sujit K M wrote:
Could you Check the sort of load that your server machine is able to
take. The site you would be looking at is
http://www.petefreitag.com/item/689.cfm.
I think if the network is rejecting the select call, As the socket is
not getting created. Other wise it would wait to the required 2 Second
limit set by you.
Also are you sure of the bind part of the socket creation. Making it
threaded is an option.
Thanks,
Sujit
On Thu, Sep 10, 2009 at 4:17 PM, Jürgen Mell <mell@xxxxxxxxxxxxxxxxxxx> wrote:
Hi,
I have an application which connects via a network socket to a server
running on the same machine (IP 127.0.0.1) This application uses the
function 'select' to wait for new data from the server or until a two
seconds timeout. This works well until there is network traffic on the
external network interfaces (eth* or WLAN). When there is network traffic on
the external interfaces, the select function does not wait anymore but it
returns with a return code of zero, indicating not data available on the
socket. This happens nearly immediately (after 8 to 9 microseconds) and not
after the specified two seconds interval. The timeout parameter of select is
updated accordingly (it shows eg. 1 s 999991 us).
Up to now I could not test this with another kernel but I will try to do it
this afternoon. Are there any known problems with select? Is there any way
to circumvent this?
Any help would be greatly appreciated!
Jürgen
--
Jürgen Mell (Software-Entwicklung) mell@xxxxxxxxxxxxxxxxxxx
Tel.: +49-511-762-18226 http://www.hedrich-winding.com
FAX : +49-511-762-18225
Mobil: +49-160-7428156
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An der Universität 2 (im PZH)
D-30823 Garbsen (GERMANY)
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--
Jürgen Mell (Software-Entwicklung) mell@xxxxxxxxxxxxxxxxxxx
Tel.: +49-511-762-18226 http://www.hedrich-winding.com
FAX : +49-511-762-18225
Mobil: +49-160-7428156
----------------------------------------------------------------------------
HEDRICH winding systems GmbH
An der Universität 2 (im PZH)
D-30823 Garbsen (GERMANY)
----------------------------------------------------------------------------
Geschäftsführer: Karsten Adam
Handelsregister: Wetzlar, HRB 4768
Steuernr.: 020/235/20110 USt-IdNr.: DE 258258279
----------------------------------------------------------------------------
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