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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.h>
#include <glibtop/error.h>
#include <glibtop/swap.h>
#include <glibtop_suid.h>
static const unsigned long _glibtop_sysdeps_swap =
(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
(1L << GLIBTOP_SWAP_FREE);
static const unsigned long _glibtop_sysdeps_swap_paging =
(1L << GLIBTOP_SWAP_PAGEIN) + (1L << GLIBTOP_SWAP_PAGEOUT);
static int pagesize;
/* Init function. */
void
_glibtop_init_swap_p (glibtop *server)
{
pagesize = getpagesize ();
server->sysdeps.swap = _glibtop_sysdeps_swap |
_glibtop_sysdeps_swap_paging;
}
/* Provides information about swap usage. */
void
glibtop_get_swap_p (glibtop *server, glibtop_swap *buf)
{
size_t len;
unsigned int swappgsout, swappgsin;
int nswdev;
struct kvm_swap kvmsw[16];
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SWAP), 0);
memset (buf, 0, sizeof (glibtop_swap));
memset (kvmsw, 0, sizeof (kvmsw));
nswdev = kvm_getswapinfo (server->machine.kd, kvmsw, 16, 0);
if (nswdev < 1) return;
buf->flags = _glibtop_sysdeps_swap;
/* See the man page for kvm_getswapinfo(3) to see why we can do this. */
buf->used = kvmsw[nswdev].ksw_used;
buf->total = kvmsw[nswdev].ksw_total;
buf->total *= pagesize;
buf->used *= pagesize;
buf->free = buf->total - buf->used;
len = sizeof (swappgsout);
if (sysctlbyname ("vm.stats.vm.v_swappgsout", &swappgsout, &len, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (vm.stats.vm.v_swappgsout)");
return;
}
len = sizeof (swappgsin);
if (sysctlbyname ("vm.stats.vm.v_swappgsin", &swappgsin, &len, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (vm.stats.vm.v_swappgsin)");
return;
}
buf->pagein = (guint64) swappgsin;
buf->pageout = (guint64) swappgsout;
buf->flags |= _glibtop_sysdeps_swap_paging;
}
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