Process hanging on 6.0-STABLE

David Xu davidxu at
Wed Mar 22 08:11:19 UTC 2006

在 Wednesday 22 March 2006 15:25,Daniel O'Connor 写道:
> Hi,
> I work for a small company that makes radar systems for research 
> organisations and we use FreeBSD on the PCs for data acquisition and 
> processing. We have recently shifted to FreeBSD6/amd64 and one machine in 
> particular is exhibiting a strange problem.
> The acquisition process is a Tcl interpreter with a largish chunk of C code
>  which talks to the hardware (via RS485 and a custom PCI card). Once the 
> system is set up it streams data back via the PCI card and runs it through
>  various data processors (eg dump raw data to disk, FFT, winds, etc..). 
> The actual forking of processes is handled in Tcl and the C code only gets
>  involved to write the data out (to an FD the Tcl layer keeps).
> The problem is that every now and then the process gets stuck and becomes
>  unkillable just after forking, ie..
Are you using pthreads ?

David Xu

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