PWAIT$SDA,UTILITIES, a SDA extension to display info about a waiting process PWAIT$SDA is a SDA extension (using the API first documented for VMS V7.2) which displays information about a process waiting and what it is waiting for. It is intended to help investigating why a process appears hung. TO USE When analyzing a crash dump or the current running system using SDA enter the command PWAIT (at the SDA> prompt) and information will be displayed about the currently selected process. The currently selected process is the process most recently displayed with SHOW PROCESS or the current process in a crash or the process selected with SET PROCESS. If you specify any parameters or qualifiers to PWAIT they are passed to a SDA SET PROCESS command to change the currently selected process e.g. To look at process with pid 321 PWAIT /ID=321 To look at the process named SERVER PWAIT SERVER The information displayed varies depending on the process state. EFW - the number of the event flag(s) - the local event flags and common event flags (if relevent) - the active I/O channels and related I/O requests - the timer requests for this process JIBWAIT i.e. waiting a pooled quota such as BYTLM - name of quota and initial and current values RWAST - name of quota (if BIOLM/DIOLM appears to be 0) - pc at which process is waiting - the active I/O channels and related I/O requests RWMBX - name of mailbox that process is waiting for space in MUXTEX - address of mutex inc related symbolic name if known AUTHOR This program was written by Ian Miller. Bug reports and comments to miller@encompasserve.org CHANGES V0.1 Initial version. V0.2 more info V0.3 For RWMBX try and workout which mailbox V0.4 Look at Kernel Thread Blocks instead of PCB, various tidy up V0.5 Display active channels. Allow specification of process. V0.6 Display some IRPs V0.7 Display Timer Queue and how long process has been waiting V0.8 Fix build on VMS V7.2-1 TO BUILD A C compiler is required. I use DEC C V6.5 @B_PWAIT$SDA.COM INSTALLATION Either copy PWAIT$SDA.EXE to SYS$SHARE or define a logical name PWAIT$SDA as the current location. DEFINE PWAIT$SDA DISK:[DIR.SUBDIR]PWAIT$SDA.EXE COPYRIGHT NOTICE This software is COPYRIGHT © 2004, Ian Miller. ALL RIGHTS RESERVED. This software is released under the licence defined below. LICENSE The Artistic License Preamble The intent of this document is to state the conditions under which a Package may be copied, such that the Copyright Holder maintains some semblance of artistic control over the development of the package, while giving the users of the package the right to use and distribute the Package in a more-or-less customary fashion, plus the right to make reasonable modifications. 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