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/* Copyright (C) 1998 Joshua Sled
This file is part of LibGTop 1.0.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/cpu.h>
#include <glibtop_suid.h>
static const unsigned long _glibtop_sysdeps_cpu =
(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
(1L << GLIBTOP_CPU_NICE) + (1L << GLIBTOP_CPU_SYS) +
(1L << GLIBTOP_CPU_IDLE) + (1L << GLIBTOP_CPU_FREQUENCY) +
(1L << GLIBTOP_CPU_IRQ);
static const unsigned long _glibtop_sysdeps_cpu_smp =
(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +
(1L << GLIBTOP_XCPU_NICE) + (1L << GLIBTOP_XCPU_SYS) +
(1L << GLIBTOP_XCPU_IDLE) + (1L << GLIBTOP_XCPU_IRQ);
/* MIB array for sysctl */
static int mib_length=2;
static int mib_cr [] = { CTL_KERN, KERN_CLOCKRATE };
static int mib_cptime [] = { CTL_KERN, KERN_CPTIME };
static int mib_cptime_s [] = { CTL_KERN, KERN_CPTIME2, 0 };
/* Init function. */
void
_glibtop_init_cpu_s (glibtop *server)
{
server->sysdeps.cpu = _glibtop_sysdeps_cpu;
if (server->ncpu)
server->sysdeps.cpu |= _glibtop_sysdeps_cpu_smp;
}
/* Provides information about cpu usage. */
void
glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)
{
long cpts [CPUSTATES];
int64_t *cp_times = NULL;
struct clockinfo ci;
size_t length;
int ncpu, i;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_CPU, 0);
memset (buf, 0, sizeof (glibtop_cpu));
/* If this fails, the nlist may not be valid. */
if (server->sysdeps.cpu == 0)
return;
length = sizeof (cpts);
if (sysctl (mib_cptime, mib_length, cpts, &length, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (kern.cptime)");
return;
}
/* Get the clockrate data */
length = sizeof (struct clockinfo);
if (sysctl (mib_cr, mib_length, &ci, &length, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (kern.clockrate)");
return;
}
/* set user time */
buf->user = cpts [CP_USER];
/* set nice time */
buf->nice = cpts [CP_NICE];
/* set sys time */
buf->sys = cpts [CP_SYS];
/* set idle time */
buf->idle = cpts [CP_IDLE];
/* set irq */
buf->irq = cpts [CP_INTR];
/* set frequency */
buf->frequency = (ci.stathz ? ci.stathz : ci.hz);
/* set total */
buf->total = cpts [CP_USER] + cpts [CP_NICE] \
+ cpts [CP_SYS] + cpts [CP_IDLE] + cpts [CP_INTR];
ncpu = server->ncpu + 1;
/*
if (!cp_times) {
if ((cp_times = calloc(sizeof(int64_t *), ncpu)) == NULL)
return;
}
*/
length = CPUSTATES * sizeof(int64_t);
for (i = 0; i < ncpu; i++) {
mib_cptime_s[2] = i;
cp_times = g_malloc (length);
if (sysctl (mib_cptime_s, 3, cp_times, &length, NULL, 0) < 0)
free(cp_times);
if (cp_times) {
buf->xcpu_user[i] = cp_times[CP_USER];
buf->xcpu_nice[i] = cp_times[CP_NICE];
buf->xcpu_sys[i] = cp_times[CP_SYS];
buf->xcpu_idle[i] = cp_times[CP_IDLE];
buf->xcpu_irq[i] = cp_times[CP_INTR];
} else {
buf->xcpu_user[i] = cpts [CP_USER] / ncpu;
buf->xcpu_nice[i] = cpts [CP_NICE] / ncpu;
buf->xcpu_sys[i] = cpts [CP_SYS] / ncpu;
buf->xcpu_idle[i] = cpts [CP_IDLE] / ncpu;
buf->xcpu_irq[i] = cpts [CP_INTR] / ncpu;
}
buf->xcpu_total[i] = buf->xcpu_user[i] + buf->xcpu_nice[i] \
+ buf->xcpu_sys[i] + buf->xcpu_idle[i] \
+ buf->xcpu_irq[i];
}
g_free (cp_times);
/* Set the flags last. */
buf->flags = _glibtop_sysdeps_cpu;
if (ncpu > 1) {
buf->flags |= _glibtop_sysdeps_cpu_smp;
}
}
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