90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/swap.h>
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#include <assert.h>
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#include <sys/sysinfo.h>
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#include <glibtop_private.h>
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static const unsigned long _glibtop_sysdeps_swap =
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(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
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(1L << GLIBTOP_SWAP_FREE);
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/* Init function. */
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void
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glibtop_init_swap_s (glibtop *server)
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{
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server->sysdeps.swap = _glibtop_sysdeps_swap;
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}
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/* Provides information about swap usage. */
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void
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glibtop_get_swap_s (glibtop *server, glibtop_swap *buf)
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{
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kstat_ctl_t *kc = server->machine.kc;
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kstat_t *ksp = server->machine.vminfo_kstat;
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u_int64_t swap_resv, swap_alloc, swap_avail, swap_free;
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vminfo_t vminfo;
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double rate;
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kid_t ret;
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memset (buf, 0, sizeof (glibtop_swap));
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if (!ksp) return;
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switch(kstat_chain_update(kc))
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{
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case -1: assert(0); /* Debugging, shouldn't happen */
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case 0: break;
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default: glibtop_get_kstats(server);
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}
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ret = kstat_read (kc, ksp, &vminfo);
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if (ret == -1) {
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glibtop_warn_io_r (server, "kstat_read (vminfo)");
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return;
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}
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rate = (ksp->ks_snaptime - server->machine.vminfo_snaptime) / 1E+9;
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swap_resv = (vminfo.swap_resv - server->machine.vminfo.swap_resv) / rate;
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swap_alloc = (vminfo.swap_alloc - server->machine.vminfo.swap_alloc) / rate;
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swap_avail = (vminfo.swap_avail - server->machine.vminfo.swap_avail) / rate;
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swap_free = (vminfo.swap_free - server->machine.vminfo.swap_free) / rate;
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memcpy (&server->machine.vminfo, &vminfo, sizeof (vminfo_t));
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server->machine.vminfo_snaptime = ksp->ks_snaptime;
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buf->total = swap_resv + swap_avail;
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buf->used = swap_alloc;
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buf->free = buf->total - buf->used;
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buf->flags = _glibtop_sysdeps_swap;
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}
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