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 ?
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