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 functions.

       -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.

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

       Josef Weidendorfer <>.

Release 3.17.0                     05/20/2021               CALLGRIND CONTROL(1)