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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 <glibtop_suid.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <uvm/uvm_extern.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) + (1L << GLIBTOP_MEM_LOCKED);
#ifndef LOG1024
#define LOG1024 10
#endif
/* these are for getting the memory statistics */
static int pageshift; /* log base 2 of the pagesize */
/* define pagetok in terms of pageshift */
#define pagetok(size) ((size) << pageshift)
/* MIB array for sysctl */
static int uvmexp_mib [] = { CTL_VM, VM_UVMEXP };
static int bcstats_mib [] = { CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT };
/* Init function. */
void
_glibtop_init_mem_s (glibtop *server)
{
register int pagesize;
/* get the page size and calculate pageshift from it */
pagesize = sysconf(_SC_PAGESIZE);
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
/* we only need the amount of log(2)1024 for our conversion */
pageshift -= LOG1024;
server->sysdeps.mem = _glibtop_sysdeps_mem;
}
void
glibtop_get_mem_s (glibtop *server, glibtop_mem *buf)
{
struct uvmexp uvmexp;
struct bcachestats bcstats;
size_t length;
glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_MEM), 0);
memset (buf, 0, sizeof (glibtop_mem));
if (server->sysdeps.mem == 0)
return;
/* Get the data from sysctl */
length = sizeof (uvmexp);
if (sysctl (uvmexp_mib, 2, &uvmexp, &length, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (vm.uvmexp)");
bzero(&uvmexp, sizeof(length));
return;
}
length = sizeof (bcstats);
if (sysctl (bcstats_mib, 3, &bcstats, &length, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (vfs.generic.bcstats)");
bzero(&bcstats, sizeof(length));
return;
}
/* convert memory stats to Kbytes */
buf->total = (guint64) pagetok (uvmexp.npages) << LOG1024;
buf->used = (guint64) pagetok (uvmexp.npages - uvmexp.free) << LOG1024;
buf->free = (guint64) pagetok (uvmexp.free) << LOG1024;
buf->locked = (guint64) pagetok (uvmexp.wired) << LOG1024;
buf->shared = (guint64) pagetok (0 /* XXX */) << LOG1024;
buf->cached = (guint64) pagetok (bcstats.numbufpages) << LOG1024;
buf->buffer = 0;
buf->user = buf->total - buf->free - buf->cached - buf->buffer;
/* Set the values to return */
buf->flags = _glibtop_sysdeps_mem;
}
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