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/* $Id$ */
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the Gnome Top Library.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
The Gnome Top Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Top Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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/mem.h>
#include <glibtop_suid.h>
#include <sys/sysctl.h>
#include <sys/vmmeter.h>
#include <vm/vm_param.h>
static const unsigned long _glibtop_sysdeps_mem =
(1 << GLIBTOP_MEM_TOTAL) + (1 << GLIBTOP_MEM_USED) +
(1 << GLIBTOP_MEM_FREE) + (1 << GLIBTOP_MEM_SHARED) +
(1 << GLIBTOP_MEM_BUFFER) +
#ifdef __FreeBSD__
(1 << GLIBTOP_MEM_CACHED) +
#endif
(1 << GLIBTOP_MEM_USER) + (1 << 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)
/* nlist structure for kernel access */
static struct nlist nlst [] = {
{ "_cnt" },
#ifdef __FreeBSD__
{ "_bufspace" },
#else
{ "_bufpages" },
#endif
{ 0 }
};
/* MIB array for sysctl */
/* static int mib_length=2; */
static int mib [] = { CTL_VM, VM_METER };
/* Init function. */
void
glibtop_init_mem_p (glibtop *server)
{
register int pagesize;
if (kvm_nlist (server->machine.kd, nlst) != 0) {
glibtop_warn_io_r (server, "kvm_nlist (mem)");
return;
}
/* get the page size with "getpagesize" and calculate pageshift
* from it */
pagesize = getpagesize ();
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_p (glibtop *server, glibtop_mem *buf)
{
struct vmtotal vmt;
size_t length_vmt;
struct vmmeter vmm;
u_int v_used_count;
u_int v_total_count;
int bufspace;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_MEM), 0);
memset (buf, 0, sizeof (glibtop_mem));
if (server->sysdeps.mem == 0)
return;
/* [FIXME: On FreeBSD 2.2.6, sysctl () returns an incorrect
* value for `vmt.vm'. We use some code from Unix top
* here.] */
/* Get the data from sysctl */
length_vmt = sizeof (vmt);
if (sysctl (mib, 2, &vmt, &length_vmt, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl");
return;
}
/* Get the data from kvm_* */
if (kvm_read (server->machine.kd, nlst[0].n_value,
&vmm, sizeof (vmm)) != sizeof (vmm)) {
glibtop_warn_io_r (server, "kvm_read (cnt)");
return;
}
if (kvm_read (server->machine.kd, nlst[1].n_value,
&bufspace, sizeof (bufspace)) != sizeof (bufspace)) {
glibtop_warn_io_r (server, "kvm_read (bufspace)");
return;
}
/* convert memory stats to Kbytes */
#ifdef __FreeBSD__
v_total_count = vmm.v_page_count;
#else
v_total_count = vmm.v_kernel_pages +
vmm.v_free_count + vmm.v_wire_count +
vmm.v_active_count + vmm.v_inactive_count;
#endif
v_used_count = vmm.v_active_count + vmm.v_inactive_count;
buf->total = (u_int64_t) pagetok (v_total_count) << LOG1024;
buf->used = (u_int64_t) pagetok (v_used_count) << LOG1024;
buf->free = (u_int64_t) pagetok (vmm.v_free_count) << LOG1024;
#ifdef __FreeBSD__
buf->cached = (u_int64_t) pagetok (vmm.v_cache_count) << LOG1024;
#endif
buf->locked = (u_int64_t) pagetok (vmm.v_wire_count) << LOG1024;
buf->shared = (u_int64_t) pagetok (vmt.t_rmshr) << LOG1024;
#if __FreeBSD__
buf->buffer = (u_int64_t) bufspace;
#else
buf->buffer = (u_int64_t) pagetok (bufspace) << LOG1024;
#endif
/* user */
buf->user = buf->total - buf->free - buf->shared - buf->buffer;
/* Set the values to return */
buf->flags = _glibtop_sysdeps_mem;
}
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