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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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/mem.h>
#include <glibtop_suid.h>
#include <sys/sysctl.h>
#include <sys/vmmeter.h>
#if defined(__NetBSD__) && (__NetBSD_Version__ < 105020000)
#include <vm/vm_param.h>
#endif
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
#include <uvm/uvm_extern.h>
#endif
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) +
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
(1L << GLIBTOP_MEM_CACHED) +
#endif
(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)
/* nlist structure for kernel access */
static struct nlist nlst [] = {
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
{ "_bufpages" },
{ 0 }
#else
#if defined(__bsdi__)
{ "_bufcachemem" },
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
{ "_bufspace" },
#else
{ "_bufpages" },
#endif
{ "_cnt" },
{ 0 }
#endif
};
/* MIB array for sysctl */
#ifdef __bsdi__
static int mib [] = { CTL_VM, VM_TOTAL };
#else
static int mib [] = { CTL_VM, VM_METER };
#endif
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
static int mib_uvmexp [] = { CTL_VM, VM_UVMEXP };
#endif
/* 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;
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
struct uvmexp uvmexp;
size_t length_uvmexp;
#else
struct vmmeter vmm;
#endif
u_int v_used_count;
u_int v_total_count;
u_int v_free_count;
int bufspace;
glibtop_init_p (server, (1L << 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 (vmt)");
return;
}
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
length_uvmexp = sizeof (uvmexp);
if (sysctl (mib_uvmexp, 2, &uvmexp, &length_uvmexp, NULL, 0)) {
glibtop_warn_io_r (server, "sysctl (uvmexp)");
return;
}
#else
/* Get the data from kvm_* */
if (kvm_read (server->machine.kd, nlst[1].n_value,
&vmm, sizeof (vmm)) != sizeof (vmm)) {
glibtop_warn_io_r (server, "kvm_read (cnt)");
return;
}
#endif
if (kvm_read (server->machine.kd, nlst[0].n_value,
&bufspace, sizeof (bufspace)) != sizeof (bufspace)) {
glibtop_warn_io_r (server, "kvm_read (bufspace)");
return;
}
/* convert memory stats to Kbytes */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
v_total_count = vmm.v_page_count;
#else
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
v_total_count = uvmexp.reserve_kernel +
uvmexp.reserve_pagedaemon +
uvmexp.free + uvmexp.wired + uvmexp.active +
uvmexp.inactive;
#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
#endif
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
v_used_count = uvmexp.active + uvmexp.inactive;
v_free_count = uvmexp.free;
#else
v_used_count = vmm.v_active_count + vmm.v_inactive_count;
v_free_count = vmm.v_free_count;
#endif
buf->total = (guint64) pagetok (v_total_count) << LOG1024;
buf->used = (guint64) pagetok (v_used_count) << LOG1024;
buf->free = (guint64) pagetok (v_free_count) << LOG1024;
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
buf->cached = (guint64) pagetok (vmm.v_cache_count) << LOG1024;
#endif
#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) || defined(__OpenBSD__)
buf->locked = (guint64) pagetok (uvmexp.wired) << LOG1024;
#else
buf->locked = (guint64) pagetok (vmm.v_wire_count) << LOG1024;
#endif
buf->shared = (guint64) pagetok (vmt.t_rmshr) << LOG1024;
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
buf->buffer = (guint64) bufspace;
#else
buf->buffer = (guint64) 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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