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CALLGRIND CONTROL(1)           callgrind_control          CALLGRIND CONTROL(1)

       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

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

       Josef Weidendorfer <>.

Release 3.20.0                    10/24/2022              CALLGRIND CONTROL(1)
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