pmc(1) - NetBSD Manual Pages

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PMC(1)                  NetBSD General Commands Manual                  PMC(1)


NAME

     pmc -- performance-monitoring counter interface for command execution


SYNOPSIS

     pmc -h
     pmc -C
     pmc -c event command [options ...]


DESCRIPTION

     pmc is a means of using a processor's performance-monitoring counter
     (PMC) facility to measure various aspects of a program's execution.  It
     is meant to be used in a fashion similar to time(1).

     The arguments are as follows:

     -h      Display a list of performance counter events available on the
             system.

     -C      Cancel any performance counters that are currently running.

     -c event
             Count the event specified by event while running the command.


DIAGNOSTICS

     PMC support is not compiled into the kernel  Performance-monitoring
     counter support has not been compiled into the kernel.  It may be
     included using the PERFCTRS option.  See options(4) for details.

     PMC counters are not supported by CPU  Performance-monitoring counters
     are not available for the CPU.


SEE ALSO

     time(1), options(4)


HISTORY

     The pmc command first appeared in NetBSD 1.6.


AUTHORS

     The pmc command was written by Frank van der Linden
     <fvdl@wasabisystems.com>.  The kernel support for reading performance
     counters on the i386 architecture was written by
     Jason R. Thorpe <thorpej@zembu.com>.


BUGS

     The pmc command currently only supports performance-monitoring counters
     on the i386 architecture.

NetBSD 4.0                     October 24, 2000                     NetBSD 4.0