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/* Copyright (C) 1998 Joshua Sled
This file is part of LibGTop 1.0.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 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/mem.h>
#include <sys/types.h>
#include <sys/sysctl.h>
static const unsigned long _glibtop_sysdeps_mem =
(1L << GLIBTOP_MEM_TOTAL) + (1L << GLIBTOP_MEM_USED) +
(1L << GLIBTOP_MEM_FREE) + (1L << GLIBTOP_MEM_SHARED) +
(1L << GLIBTOP_MEM_BUFFER) + (1L << GLIBTOP_MEM_CACHED) +
(1L << GLIBTOP_MEM_USER);
/* these are for getting the memory statistics */
static int pagesize;
/* Init function. */
void
_glibtop_init_mem_s (glibtop *server)
{
pagesize = getpagesize ();
server->sysdeps.mem = _glibtop_sysdeps_mem;
}
static gulong mem_get_by_bytes (glibtop *server, const char *name) {
gulong result = 0;
size_t len = sizeof (result);
if (sysctlbyname (name, &result, &len, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (%s)", name);
}
return result;
}
static gulong try_mem_get_by_bytes (glibtop *server, const char *name) {
gulong result = 0;
size_t len = sizeof (result);
if (sysctlbyname (name, &result, &len, NULL, 0)) {
return 0;
}
return result;
}
static gulong mem_get_by_pages (glibtop *server, const char *name) {
guint result = 0;
size_t len = sizeof (result);
if (sysctlbyname (name, &result, &len, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (%s)", name);
}
return (gulong) result * pagesize;
}
void
glibtop_get_mem_s (glibtop *server, glibtop_mem *buf)
{
gulong memtotal;
gulong memactive;
gulong meminactive;
gulong memlaundry;
gulong memwired;
gulong memcached;
gulong membuffer;
gulong memfree;
gulong zfs_arc_size;
memset (buf, 0, sizeof *buf);
memtotal = mem_get_by_bytes (server, "hw.physmem");
memactive = mem_get_by_pages (server, "vm.stats.vm.v_active_count");
meminactive = mem_get_by_pages (server, "vm.stats.vm.v_inactive_count");
memlaundry = mem_get_by_pages (server, "vm.stats.vm.v_laundry_count");
memwired = mem_get_by_pages (server, "vm.stats.vm.v_wire_count");
memcached = mem_get_by_pages (server, "vm.stats.vm.v_cache_count");
membuffer = mem_get_by_bytes (server, "vfs.bufspace");
memfree = mem_get_by_pages (server, "vm.stats.vm.v_free_count");
zfs_arc_size = try_mem_get_by_bytes (server, "kstat.zfs.misc.arcstats.size");
buf->total = memtotal;
buf->used = memtotal - memfree;
buf->free = memfree;
buf->shared = 0;
buf->buffer = membuffer;
buf->cached = memcached + zfs_arc_size;
buf->locked = 0;
buf->user = memactive + memlaundry + memwired - zfs_arc_size;
buf->flags = _glibtop_sysdeps_mem;
}
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