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     callgrind_control - observe and control programs being run
     by Callgrind

     callgrind_control [options] [pid|program-name...]

     callgrind_control controls programs being run by the
     Valgrind tool Callgrind. When a pid/program name argument is
     not specified, all applications currently being run by
     Callgrind on this system will be used for actions given by
     the specified option(s). The default action is to give some
     brief information about the applications being run by

     -h --help
         Show a short description, usage, and summary of options.

         Show version of callgrind_control.

     -l --long
         Show also the working directory, in addition to the
         brief information given by default.

     -s --stat
         Show statistics information about active Callgrind runs.

     -b --back
         Show stack/back traces of each thread in active
         Callgrind runs. For each active function in the stack
         trace, also the number of invocations since program
         start (or last dump) is shown. This option can be
         combined with -e to show inclusive cost of active

     -e [A,B,...]  (default: all)
         Show the current per-thread, exclusive cost values of
         event counters. If no explicit event names are given,
         figures for all event types which are collected in the
         given Callgrind run are shown. Otherwise, only figures
         for event types A, B, ... are shown. If this option is
         combined with -b, inclusive cost for the functions of
         each active stack frame is provided, too.

     --dump[=<desc>]  (default: no description)
         Request the dumping of profile information. Optionally,
         a description can be specified which is written into the
         dump as part of the information giving the reason which
         triggered the dump action. This can be used to
         distinguish multiple dumps.

     -z --zero
         Zero all event counters.

     -k --kill
         Force a Callgrind run to be terminated.

         Switch instrumentation mode on or off. If a Callgrind
         run has instrumentation disabled, no simulation is done
         and no events are counted. This is useful to skip
         uninteresting program parts, as there is much less
         slowdown (same as with the Valgrind tool "none"). See
         also the Callgrind option --instr-atstart.

         Specify the vgdb prefix to use by callgrind_control.
         callgrind_control internally uses vgdb to find and
         control the active Callgrind runs. If the --vgdb-prefix
         option was used for launching valgrind, then the same
         option must be given to callgrind_control.

See Also
     valgrind(1), $INSTALL/share/doc/valgrind/html/index.html or

     Josef Weidendorfer <>.
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