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/* 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>
#include "glibtop_private.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);
static const unsigned long _glibtop_sysdeps_cpu_2_6 =
(1L << GLIBTOP_CPU_IOWAIT) + (1L << GLIBTOP_CPU_IRQ) +
(1L << GLIBTOP_CPU_SOFTIRQ);
static const unsigned long _glibtop_sysdeps_cpu_smp_2_6 =
(1L << GLIBTOP_XCPU_IOWAIT) + (1L << GLIBTOP_XCPU_IRQ) +
(1L << GLIBTOP_XCPU_SOFTIRQ);
/* 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;
if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
{
server->sysdeps.cpu |= _glibtop_sysdeps_cpu_2_6;
if (server->ncpu)
server->sysdeps.cpu |= _glibtop_sysdeps_cpu_smp_2_6;
}
}
/* Provides information about cpu usage. */
#define FILENAME "/proc/stat"
void
glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)
{
char buffer [BUFSIZ], *p;
int i;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_CPU, 0);
memset (buf, 0, sizeof (glibtop_cpu));
file_to_buffer(server, buffer, FILENAME);
/*
* GLOBAL
*/
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);
buf->total = buf->user + buf->nice + buf->sys + buf->idle;
/* 2.6 kernel */
if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
{
buf->iowait = strtoull(p, &p, 0);
buf->irq = strtoull(p, &p, 0);
buf->softirq = strtoull(p, &p, 0);
buf->total += buf->iowait + buf->irq + buf->softirq;
}
buf->frequency = 100;
buf->flags = _glibtop_sysdeps_cpu;
/*
* PER CPU
*/
for (i = 0; i <= server->ncpu; i++) {
p = skip_line(p); /* move to ^ */
if (!check_cpu_line_warn(server, p, i))
break;
p = skip_token(p); /* "cpuN" */
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);
buf->xcpu_total[i] = buf->xcpu_user [i] \
+ buf->xcpu_nice [i] \
+ buf->xcpu_sys [i] \
+ buf->xcpu_idle [i];
/* 2.6 kernel */
if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
{
buf->xcpu_iowait [i] = strtoull(p, &p, 0);
buf->xcpu_irq [i] = strtoull(p, &p, 0);
buf->xcpu_softirq [i] = strtoull(p, &p, 0);
buf->xcpu_total [i] += buf->xcpu_iowait [i] \
+ buf->xcpu_irq [i] \
+ buf->xcpu_softirq [i];
}
}
if(server->ncpu) /* ok, that's a real SMP */
buf->flags |= _glibtop_sysdeps_cpu_smp;
if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
{
buf->flags |= _glibtop_sysdeps_cpu_2_6;
if(server->ncpu) /* ok, that's a real SMP */
buf->flags |= _glibtop_sysdeps_cpu_smp_2_6;
}
}
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