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/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop/error.h>
#include <glibtop/cpu.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);
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);
/* 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. */
#define FILENAME "/proc/stat"
void
glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)
{
char buffer [BUFSIZ], *p;
int fd, len, i;
u_int64_t total;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_CPU, 0);
memset (buf, 0, sizeof (glibtop_cpu));
fd = open (FILENAME, O_RDONLY);
if (fd < 0)
glibtop_error_io_r (server, "open (%s)", FILENAME);
len = read (fd, buffer, BUFSIZ-1);
if (len < 0)
glibtop_error_io_r (server, "read (%s)", FILENAME);
close (fd);
buffer [len] = '\0';
p = skip_token (buffer); /* "cpu" */
buf->user = strtoull (p, &p, 0);
buf->nice = strtoull (p, &p, 0);
buf->sys = strtoull (p, &p, 0);
buf->idle = strtoull (p, &p, 0);
total = buf->user;
total += buf->nice;
total += buf->sys;
total += buf->idle;
buf->total = total;
buf->frequency = 100;
buf->flags = _glibtop_sysdeps_cpu;
for (i = 0; i < server->ncpu; i++) {
if (strncmp (p+1, "cpu", 3) || !isdigit (p [4]))
break;
p += 6;
buf->xcpu_user [i] = strtoull (p, &p, 0);
buf->xcpu_nice [i] = strtoull (p, &p, 0);
buf->xcpu_sys [i] = strtoull (p, &p, 0);
buf->xcpu_idle [i] = strtoull (p, &p, 0);
total = buf->xcpu_user [i];
total += buf->xcpu_nice [i];
total += buf->xcpu_sys [i];
total += buf->xcpu_idle [i];
buf->xcpu_total [i] = total;
}
buf->flags |= _glibtop_sysdeps_cpu_smp;
}
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