/* 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 <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/cpu.h>

#include <assert.h>

#include <sys/processor.h>

#include <glibtop_private.h>

static const unsigned long _glibtop_sysdeps_cpu_freq =

(1L << GLIBTOP_CPU_FREQUENCY);

static const unsigned long _glibtop_sysdeps_cpu_all =

(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +

(1L << GLIBTOP_CPU_SYS) + (1L << GLIBTOP_CPU_IDLE) +

(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +

(1L << GLIBTOP_XCPU_SYS) + (1L << GLIBTOP_XCPU_IDLE) +

(1L << GLIBTOP_XCPU_FLAGS) +

(1L << GLIBTOP_CPU_FREQUENCY);

/* Init function. */

void

_glibtop_init_cpu_s (glibtop *server)

{

    server->sysdeps.cpu = _glibtop_sysdeps_cpu_all;

}

/* Provides information about cpu usage. */

void

glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)

{

    kstat_ctl_t * const kc = server->machine->kc;

    cpu_stat_t cpu_stat;

    processorid_t cpu;

    int ncpu, found;

    memset (buf, 0, sizeof (glibtop_cpu));

    buf->frequency = server->machine->ticks;

    buf->flags = _glibtop_sysdeps_cpu_freq;

    if(!kc)

	return;

    switch(kstat_chain_update(kc))

    {

	case -1: assert(0); /* Debugging purposes, shouldn't happen */

	case 0:  break;

	default: glibtop_get_kstats(server);

    }

    ncpu = MIN(GLIBTOP_NCPU, server->ncpu);

    for (cpu = 0, found = 0; cpu < GLIBTOP_NCPU && found != ncpu; cpu++)

    {

	kstat_t * const ksp = server->machine->cpu_stat_kstat [cpu];

	if (!ksp) continue;;

	++found;

	if(p_online(cpu, P_STATUS) == P_ONLINE)

	    buf->xcpu_flags |= (1L << cpu);

	else

	    continue;

	if (kstat_read (kc, ksp, &cpu_stat) == -1) {

	    glibtop_warn_io_r (server, "kstat_read (cpu_stat%d)", cpu);

	    continue;

	}

	buf->xcpu_idle [cpu] = cpu_stat.cpu_sysinfo.cpu [CPU_IDLE];

	buf->xcpu_user [cpu] = cpu_stat.cpu_sysinfo.cpu [CPU_USER];

	buf->xcpu_sys [cpu] = cpu_stat.cpu_sysinfo.cpu [CPU_KERNEL];

	buf->xcpu_total [cpu] = buf->xcpu_idle [cpu] + buf->xcpu_user [cpu] +

	    buf->xcpu_sys [cpu];

	buf->idle += cpu_stat.cpu_sysinfo.cpu [CPU_IDLE];

	buf->user += cpu_stat.cpu_sysinfo.cpu [CPU_USER];

	buf->sys  += cpu_stat.cpu_sysinfo.cpu [CPU_KERNEL];

    }

    if(!found)

	return;

    buf->total = buf->idle + buf->user + buf->sys;

    buf->flags = _glibtop_sysdeps_cpu_all;

}