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read system call hangs
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Jaydeep Chovatia
May 21, 2012, 6:10:47 PM5/21/12
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Hi,
I am using "read" system call in my C++ project (Redhat Linux) to read data from sockets. I have also set read timeout (SO_RCVTIMEO) to 5 seconds using "setsockopt", but when I run my application under load run then sometimes this "read" system call hangs, it neither returns data nor it times out.
Any suggestion/help would be appreciated.
Thank you,
Jaydeep
I am using "read" system call in my C++ project (Redhat Linux) to read data from sockets. I have also set read timeout (SO_RCVTIMEO) to 5 seconds using "setsockopt", but when I run my application under load run then sometimes this "read" system call hangs, it neither returns data nor it times out.
Any suggestion/help would be appreciated.
Thank you,
Jaydeep
Volker Birk
May 22, 2012, 12:02:05 AM5/22/12
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Yours,
VB.
--
"Warum machen wir den Massenmörder Breivik zum Popstar des Bösen?"
"Weil eine Million Sarrazin-Buchkäufer schlechter aufs Gruppenfoto passen."
Friedrich Küppersbusch in <https://www.taz.de/Die-Woche/!91993/>
Barry Margolin
May 22, 2012, 9:06:06 AM5/22/12
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In article <jpf33t...@news.in-ulm.de>,
both calls should be affected. read() is just recv() with default
options.
--
Barry Margolin, bar...@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
Volker Birk <bum...@dingens.org> wrote:
> Jaydeep Chovatia <chovatia...@gmail.com> wrote:
> > I am using "read" system call in my C++ project (Redhat Linux) to read
> > data from sockets. I have also set read timeout (SO_RCVTIMEO) to 5
> > seconds using "setsockopt", but when I run my application under load
> > run then sometimes this "read" system call hangs, it neither returns
> > data nor it times out.
> > Any suggestion/help would be appreciated.
>
> Just a guess: why not using recv(2) instead of read(2) ?
According to the man page for the SO_RCVTIMEO and SO_SNDTIMEO options,
> Jaydeep Chovatia <chovatia...@gmail.com> wrote:
> > I am using "read" system call in my C++ project (Redhat Linux) to read
> > data from sockets. I have also set read timeout (SO_RCVTIMEO) to 5
> > seconds using "setsockopt", but when I run my application under load
> > run then sometimes this "read" system call hangs, it neither returns
> > data nor it times out.
> > Any suggestion/help would be appreciated.
>
> Just a guess: why not using recv(2) instead of read(2) ?
both calls should be affected. read() is just recv() with default
options.
--
Barry Margolin, bar...@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
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