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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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <sys/systemcfg.h>
#include <sys/sysinfo.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/cpu.h>
#include <utils.h>
static const unsigned long _glibtop_sysdeps_cpu =
(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
(1L << GLIBTOP_CPU_SYS) + (1L << GLIBTOP_CPU_IDLE) +
(1L << GLIBTOP_CPU_NICE) + (1 << GLIBTOP_CPU_FREQUENCY) +
(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +
(1L << GLIBTOP_XCPU_SYS) + (1L << GLIBTOP_XCPU_IDLE) +
(1L << GLIBTOP_XCPU_NICE);
/* Init function. */
void
_glibtop_init_cpu_p (glibtop *server)
{
off_t result;
server->ncpu = _system_configuration.ncpus;
if (server->ncpu == 1)
{
server->ncpu = 0; /* means single-processor, see glibtop.h */
}
result = _glibtop_get_kmem_offset(server, "sysinfo");
if (result == -1)
{
return;
}
server->machine->sysinfo_offset = result;
result = _glibtop_get_kmem_offset(server, "cpuinfo");
if (result == -1)
{
server->sysdeps.cpu = 0;
return;
}
server->machine->cpuinfo_offset = result;
server->machine->cpuinfo = (struct cpuinfo*)calloc(_system_configuration.ncpus, sizeof(struct cpuinfo));
server->sysdeps.cpu = _glibtop_sysdeps_cpu;
}
/* Provides information about cpu usage. */
void
glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)
{
int result;
int cpu;
struct sysinfo sysinfo;
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_CPU), 0);
memset (buf, 0, sizeof (glibtop_cpu));
result = _glibtop_get_kmem_info(server, server->machine->sysinfo_offset,
&sysinfo, sizeof(struct sysinfo));
if (result <= 0)
{
glibtop_error_io_r (server, "Cannot read sysinfo");
return;
}
buf->idle = sysinfo.cpu[CPU_IDLE];
buf->user = sysinfo.cpu[CPU_USER];
buf->sys = sysinfo.cpu[CPU_KERNEL];
buf->nice = sysinfo.cpu[CPU_WAIT];
buf->total = buf->idle + buf->user + buf->sys + buf->nice ;
result = _glibtop_get_kmem_info(server, server->machine->cpuinfo_offset,
server->machine->cpuinfo,
_system_configuration.ncpus
* sizeof(struct cpuinfo));
if (result <= 0)
{
glibtop_error_io_r (server, "Cannot read cpuinfo");
return;
}
for (cpu = 0; cpu < MIN(GLIBTOP_NCPU, _system_configuration.ncpus); cpu++)
{
buf->xcpu_idle[cpu] =
server->machine->cpuinfo[cpu].cpu[CPU_IDLE];
buf->xcpu_user[cpu] =
server->machine->cpuinfo[cpu].cpu[CPU_USER];
buf->xcpu_sys[cpu] =
server->machine->cpuinfo[cpu].cpu[CPU_KERNEL];
buf->xcpu_nice[cpu] =
server->machine->cpuinfo[cpu].cpu[CPU_WAIT];
buf->xcpu_total[cpu] = buf->xcpu_idle[cpu] +
buf->xcpu_user[cpu] +
buf->xcpu_sys[cpu] +
buf->xcpu_nice[cpu];
}
buf->frequency = sysconf(_SC_CLK_TCK);
buf->flags = _glibtop_sysdeps_cpu;
}
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