processes getting blocked on '0'

we are a leading SCADA system Developers. our 486 based RTU has 17 processes
running & communicationg with a Master unit on a multidrop serial link. The
sytem RTC clock of the RTU is regularly updated( every 3 min) using the
‘rtc’ command. We have observed that after some time the RTU stops working &
the sin command shows that all the processes are blocked on ‘0’. All
programs have their inbuilt timers for periodic updates. The blocking
phenomenon is not periodic , but random & occurs randomly in any of the
RTUS. Please HELP us to resolve this.

Staff
Seto Teknolog Ltd.

Staff <seto@vsnl.com> wrote in message news:alpsto$2ak$1@inn.qnx.com

we are a leading SCADA system Developers. our 486 based RTU has 17
processes
running & communicationg with a Master unit on a multidrop serial link.
The
sytem RTC clock of the RTU is regularly updated( every 3 min) using the
‘rtc’ command. We have observed that after some time the RTU stops working
&
the sin command shows that all the processes are blocked on ‘0’. All
programs have their inbuilt timers for periodic updates. The blocking
phenomenon is not periodic , but random & occurs randomly in any of the
RTUS. Please HELP us to resolve this.

Please post your sin, sin arg, sin ver, sin in, sin rt, sin prox . This
way, others can take a peek and lend a hand.

\

Cheers,
Adam

QNX Software Systems Ltd.
[ amallory@qnx.com ]

With a PC, I always felt limited by the software available.
On Unix, I am limited only by my knowledge.
–Peter J. Schoenster <pschon@baste.magibox.net>