Provided by: gtkwave_3.3.104-2build1_amd64 bug


       gtkwave - Visualization tool for VCD, LXT, LXT2, VZT, FST, and GHW files


       gtkwave [option]... [DUMPFILE] [SAVEFILE] [RCFILE]


       Visualization  tool  for  VCD,  LXT, LXT2, VZT, FST, and GHW.  VCD is an industry standard
       simulation dump format. LXT, LXT2, VZT, and FST have been designed  specifically  for  use
       with  gtkwave.   GHW is the native VHDL format generated by GHDL.  Native dumpers exist in
       Icarus Verilog and the open source version of VeriWell for the LXT formats  so  conversion
       with vcd2lxt(1) or vcd2lxt2(1) is not necessary to take direct advantage of LXT with those
       simulators.  AET2 files can also be processed provided that libae2rw is available but this
       is only of interest to people who use IBM EDA toolsets.


       -n,--nocli <directory name>
              Use file requester for dumpfile name.

       -f,--dump <filename>
              Specify dumpfile name.

              generate/use  VCD recoder fastload files.  This is similar to the -g,--giga option,
              however the spill file generated is not deleted.  Reloading the  VCD  file  another
              time  (either  through  pressing  the  reload button or by re-invoking gtkwave at a
              later time) will use this generated spill file rather than read  the  value  change
              section of the VCD file.  This will speed up reloads on large files greatly as only
              the variable declaration section needs to be parsed.   Note  that  the  spill  file
              contains  the file size and modification date of the VCD file in order to detect if
              it is stale and needs to be regenerated.

              optimize VCD to FST.  This will automatically call vcd2fst(1) to perform  the  file
              conversion.  This option is highly recommended with large VCD files in order to cut
              down on the memory usage required for file viewing.  Can  be  used  in  conjunction
              with -v,--vcd.

       -a,--save <filename>
              Specify  savefile name.  Useful suffixes for desktop integration are .gtkw and .sav

              Assume savefile is suffix modified dumpfile name (i.e.,  remove  and  replace  with

       -r,--rcfile <filename>
              Specify override .gtkwaverc filename.

       -l,--logfile <filename>
              Specify  simulation  logfile name.  Multiple logfiles may be specified by preceding
              each with the command flag.  By selecting the  numbers  in  the  text  widget,  the
              marker will immediately zoom to the specific time value.

              If there is not a .gtkwaverc file in the home directory or current directory and it
              is not explicitly specified on the command line, when this option  is  enabled,  do
              not use an implicit configuration file and instead default to the old "whitescreen"

       -D,--dualid <which>
              Specify multisession identifier information.  The format of "which"  is  m+nnnnnnnn
              where m is the session number 0 or 1 and nnnnnnnn is a hexadecimal value indicating
              the shared memory ID of an array of two gtkwave_dual_ipc_t  data  structures.   The
              intended use of this flag is for front ends such as twinwave(1).

       -s,--start <time>
              Specify start time for LXT2/VZT block skip.

       -e,--end <time>
              Specify end time for LXT2/VZT block skip.

       -t,--stems <filename>
              Specify  stems file for source code annotation.  This will automatically launch the
              rtlbrowse(1) helper process.   See  xml2stems(1)  for  information  on  stems  file

       -c,--cpu <numcpus>
              Specify number of CPUs available for parallelizable ops (e.g., block prefetching on
              VZT reads).

              Disable window manager for most windows.  The intended use of this is to be used in
              conjunction  with  the  --script  option, however this also can be used to reparent
              into an alternate window manager.

              Do not render menubar. This is mainly used for  making  a  restricted  applet  that
              cannot initiate file I/O on its own, however it also can be used as a workaround in
              earlier versions of GTK+ that do not handle  GTKSocket/GTKPlug  focus  interactions

       -S,--script <filename>
              Specify Tcl command script file for execution.

       -T,--tcl_init <filename>
              Specify Tcl command script to be loaded on startup.  Implies --wish command flag.

              Enable Tcl command line on stdio.  All script commands can be typed in on stdin.

       -R,--repscript <filename>
              Specify Tcl command script for periodic execution.

       -P,--repperiod <value>
              Specifies  delay  in  milliseconds  between successive executions of the repscript.
              Default is 500.

       -X,--xid <XID>
              Specify XID (in hexadecimal) of window for a GtkPlug to connect to.   GTKWave  does
              not  directly  render  to  a  window but instead renders into a GtkPlug expecting a
              GtkSocket at the other end.  Note that there are issues with  accelerators  working
              properly  so  menus  are  disabled  in the componentized version of GTKWave when it
              functions as a plug-in.

       -1,--rpcid <RPCID>
              Specify RPCID of GConf (or GSettings) session.  This is a  decimal  value  zero  or
              greater  and is the identifier used by GConf to know what update data to listen to.
              This option only works if --with-gconf (or --with-gsettings) was  specified  during

       -2,--chdir <DIRNAME>
              Specify  new  current  working  directory.   This  is  typically used in OSX to run
              gtkwave if it was compiled and  placed  in  an  .app  bundle.   Note  that  if  the
              environment  variable  GTKWAVE_CHDIR  is defined, the argument is a dummy argument.
              This is to support OSX in that the open command has difficulty in passing spaces as
              command line arguments and it is possible for pwd(1) to return spaces.

              Restore  previous  default (0) or  --rpcid RPCID numbered session.  This only works
              for one dumpfile, savefile, rcfile, and current working directory  so  it  has  the
              effect of restoring the most recently loaded file.  If used in conjunction with the
              --rpcid option, that option must be specified earlier in the command line than  the
              --restore  option.  If RPCID is not specified, then the default of 0 is used.  This
              option only works  if  --with-gconf  (or  --with-gsettings)  was  specified  during
              ./configure.   Note  that for GSettings, limitations in its implementation allow it
              only to restore the previous session.

              Specify single rc variable values individually.  These take effect after any  other
              rc variables have been loaded from internal defaults or from configuration files.

              Specify sst exclusion filter filename.

              At  exit, a requester is brought up to prompt user to write a save file.  Canceling
              the requester prevents from writing the file.

              Specifies that "interactive" VCD mode is to  be  used  which  allows  a  viewer  to
              navigate a VCD trace while GTKWave is processing the VCD file.  When this option is
              used, the filename is overloaded such that it is  the  hexadecimal  value  for  the
              shared  memory  ID  of  a  writer.   Note  that  the shared memory ID can be passed
              straight from stdin by using the --vcd option; see the manpage for shmidcat(1)  for
              more details.

              Specifies  that  the viewer should use legacy VCD mode rather than the VCD recoder.
              Note that using legacy mode will require considerably more memory than the  recoder
              and its use is discouraged for very large traces.

              Specifies  that  the  viewer should use gigabyte mempacking when recoding (possibly
              slower).  This is equivalent to setting the vlist_spill and vlist_prepack flags  in
              the rc file.

              Specifies  that  the  viewer should use compressed hierarchy names when loading the
              dumpfile (available for VCD recoder, LXT, LXT2,  and  VZT).   This  will  use  less
              memory at the expense of compression/decompression delay.

              Use stdin as a VCD dumpfile.

       -O,--output <filename>
              Specify  filename  for stdout/stderr redirect.  To disable messages to the console,
              use /dev/null as the filename.

              Enable slider stretch zoom for the horizontal time slider.  Clicking then  dragging
              the very left or right edge of the slider can be used to provide fine-grained real-
              time zooming.

              Display version banner then exit.

              Display help then exit.

              Exit after loading trace (for loader benchmarking).


       ~/.gtkwaverc (see manpage gtkwaverc(5))


       To run this program the standard way type:
              gtkwave dumpfile.vcd

       Alternatively you can run it with a save file as:
              gtkwave dumpfile.vcd dumpfile.gtkw

       To run interactively using shared memory handle 0x00050003:
              gtkwave -I 00050003 dumpfile.gtkw

       To pick up a dumpfile automatically from a save file (e.g., when launching from an icon):
              gtkwave --save dumpfile.gtkw

       To run from the app bundle in OSX using /bin/sh:
              GTKWAVE_CHDIR=`pwd`;export GTKWAVE_CHDIR;open -n -W -a gtkwave --args --chdir dummy
              --dump des.vzt --save des.gtkw

       Alternatively, run the following Perl script to
       process command line arguments from OSX shell scripts.

       Note that to pass non-flag items which start with a dash, that it is required  to  specify
       --  in  order to turn off flag parsing.  A second -- will disable parsing of any following
       arguments  such  that  they  can  be  passed  on  to  Tcl  scripts   and   retrieved   via

       Command line options are not necessary for representing the dumpfile, savefile, and rcfile
       names.  They are merely provided to allow specifying them out of order.


       AIX requires  -bmaxdata:0x80000000 (-bmaxdata:0xd0000000/dsa for AIX 5.3) to be  added  to
       your  list  of  compiler  flags for xlc if you want GTKWave to be able to access more than
       256MB of virtual memory. The value shown allows the VMM to use up to 2GB (3.25GB  AIX5.3).
       This may be necessary for very large traces.

       Shift  and  Page  operations  using the wave window hscrollbar may be nonfunctional as you
       move away from the dump start for very large traces. A trace that goes out to  45  billion
       ticks  has been known to exhibit this problem. This stems from using the gfloat element of
       the horizontal slider to encode the time value for the left margin. The result is  a  loss
       of precision for very large values. Use the hotkeys or buttons at the top of the screen if
       this is a problem.

       When running under Cygwin, it is required to enable Cygserver  if  shared  memory  IPC  is
       being  used.  Specifically, this occurs when rtlbrowse(1) is launched as a helper process.
       See the Cygwin documentation for more information on how to enable Cygserver.


       Anthony Bybell <>


       gtkwaverc(5)  lxt2vcd(1)  vcd2lxt(1)  vcd2lxt2(1)   vzt2vcd(1)   vcd2vzt(1)   xml2stems(1)
       rtlbrowse(1) twinwave(1) shmidcat(1)