1.\" Copyright (c) 2003,2008 Joseph Koshy. All rights reserved. 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" This software is provided by Joseph Koshy ``as is'' and 13.\" any express or implied warranties, including, but not limited to, the 14.\" implied warranties of merchantability and fitness for a particular purpose 15.\" are disclaimed. in no event shall Joseph Koshy be liable 16.\" for any direct, indirect, incidental, special, exemplary, or consequential 17.\" damages (including, but not limited to, procurement of substitute goods 18.\" or services; loss of use, data, or profits; or business interruption) 19.\" however caused and on any theory of liability, whether in contract, strict 20.\" liability, or tort (including negligence or otherwise) arising in any way 21.\" out of the use of this software, even if advised of the possibility of 22.\" such damage. 23.\" 24.\" $FreeBSD$ 25.\" 26.Dd November 9, 2008 27.Dt PMCCONTROL 8 28.Os 29.Sh NAME 30.Nm pmccontrol 31.Nd "control hardware performance monitoring counters" 32.Sh SYNOPSIS 33.Nm 34.Oo Fl c Ar cpu | Fl d Ar pmc | Fl e Ar pmc Oc ... 35.Nm 36.Fl l 37.Nm 38.Fl L 39.Nm 40.Fl s 41.Sh DESCRIPTION 42The 43.Nm 44utility controls the operation of the system's hardware performance 45monitoring counters. 46.Sh OPTIONS 47The 48.Nm 49utility processes options in command line order, so later options modify 50the effect of earlier ones. 51The following options are available: 52.Bl -tag -width indent 53.It Fl c Ar cpu 54Subsequent enable and disable options affect the CPU 55denoted by argument 56.Ar cpu . 57The argument 58.Ar cpu 59is a number denoting a CPU in the system, or 60.Dq Li * , 61denoting all unhalted CPUs in the system. 62.It Fl d Ar pmc 63Disable PMC number 64.Ar pmc 65on the CPU specified by 66.Fl c , 67preventing it from being used till subsequently re-enabled. 68The argument 69.Ar pmc 70is a number denoting a specific PMC, or 71.Dq Li * 72denoting all the PMCs on the specified CPU. 73.Pp 74Only idle PMCs may be disabled. 75.\" XXX this probably needs to be fixed. 76.It Fl e Ar pmc 77Enable PMC number 78.Ar pmc , 79on the CPU specified by 80.Fl c , 81allowing it to be used in the future. 82The argument 83.Ar pmc 84is a number denoting a specific PMC, or 85.Dq Li * 86denoting all the PMCs on the specified CPU. 87If PMC 88.Ar pmc 89is already enabled, this option has no effect. 90.It Fl l 91List available hardware performance counters and their current 92disposition. 93.It Fl L 94List available hardware performance counter classes and their 95supported event names. 96.It Fl s 97Print driver statistics maintained by 98.Xr hwpmc 4 . 99.El 100.Sh EXAMPLES 101To disable all PMCs on all CPUs, use the command: 102.Dl "pmccontrol -d*" 103.Pp 104To enable all PMCs on all CPUs, use: 105.Dl "pmccontrol -e*" 106.Pp 107To disable PMCs 0 and 1 on CPU 2, use: 108.Dl "pmccontrol -c2 -d0 -d1" 109.Pp 110To disable PMC 0 of CPU 0 only, and enable all other PMCS on all other 111CPUs, use: 112.Dl "pmccontrol -c* -e* -c0 -d0" 113.Sh DIAGNOSTICS 114.Ex -std 115.Sh SEE ALSO 116.Xr pmc 3 , 117.Xr pmclog 3 , 118.Xr hwpmc 4 , 119.Xr pmcstat 8 , 120.Xr sysctl 8 121.Sh HISTORY 122The 123.Nm 124utility first appeared in 125.Fx 6.0 . 126.Sh AUTHORS 127.An Joseph Koshy Aq jkoshy@FreeBSD.org 128