104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/* $OpenBSD: cpu.c,v 1.7 2011/07/10 15:23:01 jasper Exp $ */
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/* Copyright (C) 1998 Joshua Sled
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This file is part of LibGTop 1.0.
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Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/cpu.h>
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#include <glibtop_suid.h>
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#include <sys/sched.h>
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static const unsigned long _glibtop_sysdeps_cpu =
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(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
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(1L << GLIBTOP_CPU_NICE) + (1L << GLIBTOP_CPU_SYS) +
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(1L << GLIBTOP_CPU_IDLE) + (1L << GLIBTOP_CPU_FREQUENCY) +
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(1L << GLIBTOP_CPU_IRQ);
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/* MIB array for sysctl */
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static int mib_length=2;
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static int mib [] = { CTL_KERN, KERN_CLOCKRATE };
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static int mib2 [] = { CTL_KERN, KERN_CPTIME };
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/* Init function. */
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void
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_glibtop_init_cpu_p (glibtop *server)
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{
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server->sysdeps.cpu = _glibtop_sysdeps_cpu;
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}
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/* Provides information about cpu usage. */
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void
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glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)
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{
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gulong cpts [CPUSTATES];
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/* sysctl vars*/
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struct clockinfo ci;
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size_t length;
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glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_CPU), 0);
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memset (buf, 0, sizeof (glibtop_cpu));
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/* If this fails, the nlist may not be valid. */
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if (server->sysdeps.cpu == 0)
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return;
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length = sizeof (cpts);
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if (sysctl (mib2, mib_length, cpts, &length, NULL, 0)) {
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glibtop_warn_io_r (server, "sysctl (kern.cptime)");
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return;
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}
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/* Get the clockrate data */
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length = sizeof (struct clockinfo);
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if (sysctl (mib, mib_length, &ci, &length, NULL, 0)) {
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glibtop_warn_io_r (server, "sysctl (kern.clockrate)");
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return;
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}
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/* set user time */
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buf->user = cpts [CP_USER];
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/* set nice time */
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buf->nice = cpts [CP_NICE];
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/* set sys time */
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buf->sys = cpts [CP_SYS];
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/* set idle time */
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buf->idle = cpts [CP_IDLE];
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/* set interrupt time */
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buf->irq = cpts [CP_INTR];
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/* set frequency */
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buf->frequency = ci.hz;
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/* set total */
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buf->total = cpts [CP_USER] + cpts [CP_NICE]
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+ cpts [CP_SYS] + cpts [CP_IDLE] + cpts [CP_INTR];
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/* Set the flags last. */
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buf->flags = _glibtop_sysdeps_cpu;
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}
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