cf611f9157
1999-02-22 Martin Baulig <martin@home-of-linux.org> Set the copyright of LibGTop to the GNU General Public License. * copyright.txt: Set the year to 1998-99 and pretty-format it a little bit. Same in all C source and header files.
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 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 <glibtop.h>
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#include <glibtop/cpu.h>
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#include <glibtop_suid.h>
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static const unsigned long _glibtop_sysdeps_cpu =
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(1 << GLIBTOP_CPU_TOTAL) + (1 << GLIBTOP_CPU_USER) +
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(1 << GLIBTOP_CPU_NICE) + (1 << GLIBTOP_CPU_SYS) +
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(1 << GLIBTOP_CPU_IDLE) + (1 << GLIBTOP_CPU_FREQUENCY);
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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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long cp_time [CPUSTATES], mp_time [NCPU][CPUSTATES];
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int i;
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glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_CPU), 0);
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memset (buf, 0, sizeof (glibtop_cpu));
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/* !!! THE FOLLOWING CODE RUNS SGID KMEM - CHANGE WITH CAUTION !!! */
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glibtop_suid_enter (server);
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/* get the cp_time array */
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(void) _glibtop_getkval (server, _glibtop_nlist [X_CP_TIME].n_value,
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(int *) cp_time, sizeof (cp_time),
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_glibtop_nlist [X_CP_TIME].n_name);
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#ifdef MULTIPROCESSOR
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/* get the mp_time array as well */
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if (server->machine.ncpu > 1) {
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(void) _glibtop_getkval (server, _glibtop_nlist [X_MP_TIME].n_value,
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(int *) mp_time, sizeof (mp_time),
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_glibtop_nlist [X_MP_TIME].n_name);
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}
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#endif
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glibtop_suid_leave (server);
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/* !!! END OF SUID ROOT PART !!! */
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#ifdef MULTIPROCESSOR
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/* If we have multiple processors, we add the times for each of them
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* and set frequency to 100 times the number of the processors. */
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/* [FIXME]: I had no machine with more than one processor to test
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* this code !!! */
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if (server->machine.ncpu > 1) {
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for (i = 0; i < server->machine.ncpu; i++) {
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buf->user += mp_time [i][CP_USER];
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buf->nice += mp_time [i][CP_NICE];
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buf->sys += mp_time [i][CP_SYS];
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buf->idle += mp_time [i][CP_IDLE];
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buf->frequency += 100;
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}
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} else {
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buf->user = cp_time [CP_USER];
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buf->nice = cp_time [CP_NICE];
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buf->sys = cp_time [CP_SYS];
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buf->idle = cp_time [CP_IDLE];
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buf->frequency = 100;
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}
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#else
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buf->user = cp_time [CP_USER];
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buf->nice = cp_time [CP_NICE];
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buf->sys = cp_time [CP_SYS];
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buf->idle = cp_time [CP_IDLE];
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buf->frequency = 100;
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#endif
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/* Calculate total time. */
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buf->total = buf->user + buf->nice + buf->sys + buf->idle;
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/* Now we can set the flags. */
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buf->flags = _glibtop_sysdeps_cpu;
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}
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