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/* $Id$ */
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the Gnome Top Library.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
The Gnome Top Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Top Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <config.h>
#include <glibtop/cpu.h>
static const unsigned long _glibtop_sysdeps_cpu =
(1 << GLIBTOP_CPU_TOTAL) + (1 << GLIBTOP_CPU_USER) +
(1 << GLIBTOP_CPU_NICE) + (1 << GLIBTOP_CPU_SYS) +
(1 << GLIBTOP_CPU_IDLE) + (1 << GLIBTOP_CPU_FREQUENCY);
/* Provides information about cpu usage. */
void
glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)
{
long cp_time [CPUSTATES], mp_time [NCPU][CPUSTATES];
int i;
glibtop_init_r (&server, 0, 0);
memset (buf, 0, sizeof (glibtop_cpu));
/* !!! THE FOLLOWING CODE RUNS SGID KMEM - CHANGE WITH CAUTION !!! */
setregid (server->machine.gid, server->machine.egid);
/* get the cp_time array */
(void) _glibtop_getkval (server, _glibtop_nlist [X_CP_TIME].n_value,
(int *) cp_time, sizeof (cp_time),
_glibtop_nlist [X_CP_TIME].n_name);
#ifdef MULTIPROCESSOR
/* get the mp_time array as well */
if (server->machine.ncpu > 1) {
(void) _glibtop_getkval (server, _glibtop_nlist [X_MP_TIME].n_value,
(int *) mp_time, sizeof (mp_time),
_glibtop_nlist [X_MP_TIME].n_name);
}
#endif
if (setregid (server->machine.egid, server->machine.gid))
_exit (1);
/* !!! END OF SUID ROOT PART !!! */
#ifdef MULTIPROCESSOR
/* If we have multiple processors, we add the times for each of them and set
frequency to 100 times the number of the processors. */
/* [FIXME]: I had no machine with more than one processor to test this code !!! */
if (server->machine.ncpu > 1) {
for (i = 0; i < server->machine.ncpu; i++) {
buf->user += mp_time [i][CP_USER];
buf->nice += mp_time [i][CP_NICE];
buf->sys += mp_time [i][CP_SYS];
buf->idle += mp_time [i][CP_IDLE];
buf->frequency += 100;
}
} else {
buf->user = cp_time [CP_USER];
buf->nice = cp_time [CP_NICE];
buf->sys = cp_time [CP_SYS];
buf->idle = cp_time [CP_IDLE];
buf->frequency = 100;
}
#else
buf->user = cp_time [CP_USER];
buf->nice = cp_time [CP_NICE];
buf->sys = cp_time [CP_SYS];
buf->idle = cp_time [CP_IDLE];
buf->frequency = 100;
#endif
/* Calculate total time. */
buf->total = buf->user + buf->nice + buf->sys + buf->idle;
/* Now we can set the flags. */
buf->flags = _glibtop_sysdeps_cpu;
}
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