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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* $Id$ */
/* 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 <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/swap.h>
#include <assert.h>
#include <sys/sysinfo.h>
#include <glibtop_private.h>
static const unsigned long _glibtop_sysdeps_swap =
(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
(1L << GLIBTOP_SWAP_FREE);
/* Init function. */
int
glibtop_init_swap_s (glibtop *server)
{
server->sysdeps.swap = _glibtop_sysdeps_swap;
return 0;
}
/* Provides information about swap usage. */
int
glibtop_get_swap_s (glibtop *server, glibtop_swap *buf)
{
kstat_ctl_t *kc = server->_priv->machine.kc;
kstat_t *ksp = server->_priv->machine.vminfo_kstat;
u_int64_t swap_resv, swap_alloc, swap_avail, swap_free;
vminfo_t vminfo;
double rate;
kid_t ret;
memset (buf, 0, sizeof (glibtop_swap));
if (!ksp)
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
switch(kstat_chain_update(kc))
{
case -1: assert(0); /* Debugging, shouldn't happen */
case 0: break;
default: glibtop_get_kstats(server);
}
ret = kstat_read (kc, ksp, &vminfo);
if (ret == -1) {
glibtop_warn_io_r (server, "kstat_read (vminfo)");
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
}
rate = (ksp->ks_snaptime - server->_priv->machine.vminfo_snaptime) / 1E+9;
swap_resv = (vminfo.swap_resv - server->_priv->machine.vminfo.swap_resv) / rate;
swap_alloc = (vminfo.swap_alloc - server->_priv->machine.vminfo.swap_alloc) / rate;
swap_avail = (vminfo.swap_avail - server->_priv->machine.vminfo.swap_avail) / rate;
swap_free = (vminfo.swap_free - server->_priv->machine.vminfo.swap_free) / rate;
memcpy (&server->_priv->machine.vminfo, &vminfo, sizeof (vminfo_t));
server->_priv->machine.vminfo_snaptime = ksp->ks_snaptime;
buf->total = swap_resv + swap_avail;
buf->used = swap_alloc;
buf->free = buf->total - buf->used;
buf->flags = _glibtop_sysdeps_swap;
return 0;
}
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