143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/mem.h>
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#include <glibtop_suid.h>
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#include <sys/sysctl.h>
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#include <sys/vmmeter.h>
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#include <vm/vm_param.h>
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static const unsigned long _glibtop_sysdeps_mem =
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(1 << GLIBTOP_MEM_TOTAL) + (1 << GLIBTOP_MEM_USED) +
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(1 << GLIBTOP_MEM_FREE) + (1 << GLIBTOP_MEM_SHARED) +
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(1 << GLIBTOP_MEM_BUFFER) + (1 << GLIBTOP_MEM_CACHED) +
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(1 << GLIBTOP_MEM_USER);
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#ifndef LOG1024
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#define LOG1024 10
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#endif
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/* these are for getting the memory statistics */
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static int pageshift; /* log base 2 of the pagesize */
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/* define pagetok in terms of pageshift */
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#define pagetok(size) ((size) << pageshift)
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/* nlist structure for kernel access */
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static struct nlist nlst [] = {
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{ "_cnt" },
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{ "_bufspace" },
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{ 0 }
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};
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/* MIB array for sysctl */
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static const int mib_length=2;
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static const int mib [] = { CTL_VM, VM_METER };
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/* Init function. */
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void
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glibtop_init_mem_p (glibtop *server)
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{
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register int pagesize;
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server->sysdeps.mem = _glibtop_sysdeps_mem;
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if (kvm_nlist (server->machine.kd, nlst) != 0)
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glibtop_error_io_r (server, "kvm_nlist");
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/* get the page size with "getpagesize" and calculate pageshift
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* from it */
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pagesize = getpagesize ();
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pageshift = 0;
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while (pagesize > 1) {
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pageshift++;
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pagesize >>= 1;
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}
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/* we only need the amount of log(2)1024 for our conversion */
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pageshift -= LOG1024;
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}
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void
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glibtop_get_mem_p (glibtop *server, glibtop_mem *buf)
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{
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struct vmtotal vmt;
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size_t length_vmt;
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struct vmmeter vmm;
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int bufspace;
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glibtop_init_p (server, GLIBTOP_SYSDEPS_MEM, 0);
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memset (buf, 0, sizeof (glibtop_mem));
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/* [FIXME: On FreeBSD 2.2.6, sysctl () returns an incorrect
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* value for `vmt.vm'. We use some code from Unix top
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* here.] */
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/* Get the data from sysctl */
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length_vmt = sizeof (vmt);
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if (sysctl (mib, 2, &vmt, &length_vmt, NULL, 0))
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glibtop_error_io_r (server, "sysctl");
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/* Get the data from kvm_* */
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if (kvm_read (server->machine.kd, nlst[0].n_value,
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&vmm, sizeof (vmm)) != sizeof (vmm))
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glibtop_error_io_r (server, "kvm_read (cnt)");
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if (kvm_read (server->machine.kd, nlst[1].n_value,
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&bufspace, sizeof (bufspace)) != sizeof (bufspace))
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glibtop_error_io_r (server, "kvm_read (bufspace)");
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/* Set the values to return */
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buf->flags = _glibtop_sysdeps_mem;
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/* convert memory stats to Kbytes */
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buf->total = (u_int64_t) pagetok (vmm.v_page_count) << LOG1024;
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buf->used = (u_int64_t) pagetok (vmm.v_active_count) << LOG1024;
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buf->free = (u_int64_t) pagetok (vmm.v_free_count) << LOG1024;
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buf->cached = (u_int64_t) pagetok (vmm.v_cache_count) << LOG1024;
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buf->shared = (u_int64_t) pagetok (vmt.t_vmshr) << LOG1024;
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buf->buffer = (u_int64_t) bufspace;
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#if 0
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if (swappgsin < 0) {
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memory_stats[5] = 0;
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memory_stats[6] = 0;
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} else {
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memory_stats[5] = pagetok(((vmm.v_swappgsin - swappgsin)));
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memory_stats[6] = pagetok(((vmm.v_swappgsout - swappgsout)));
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}
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swappgsin = vmm.v_swappgsin;
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swappgsout = vmm.v_swappgsout;
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#endif
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/* user */
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buf->user = buf->total - buf->free - buf->shared - buf->buffer;
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}
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