82fdca61c2
1998-10-31 Martin Baulig <martin@home-of-linux.org> * *.c: Use glibtop_warn_io_r () instead of glibtop_error_io_r (). * proctime.c, prockernel.c, procargs.c: Don't call kvm_uread () if the /proc filesystem is not mounted.
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/* $Id$ */
|
|
|
|
/* 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/cpu.h>
|
|
|
|
#include <glibtop_suid.h>
|
|
|
|
static const unsigned long _glibtop_sysdeps_cpu =
|
|
(1 << GLIBTOP_CPU_TOTAL) + (1 << GLIBTOP_CPU_USER) +
|
|
(1 << GLIBTOP_CPU_NICE) + (1 << GLIBTOP_CPU_SYS) +
|
|
(1 << GLIBTOP_CPU_IDLE) + (1 << GLIBTOP_CPU_FREQUENCY);
|
|
|
|
/* nlist structure for kernel access */
|
|
static struct nlist nlst [] = {
|
|
{ "_cp_time" },
|
|
{ 0 }
|
|
};
|
|
|
|
/* MIB array for sysctl */
|
|
static int mib_length=2;
|
|
static int mib [] = { CTL_KERN, KERN_CLOCKRATE };
|
|
|
|
/* Init function. */
|
|
|
|
void
|
|
glibtop_init_cpu_p (glibtop *server)
|
|
{
|
|
if (kvm_nlist (server->machine.kd, nlst) != 0) {
|
|
glibtop_warn_io_r (server, "kvm_nlist (cpu)");
|
|
return;
|
|
}
|
|
|
|
/* Set this only if kvm_nlist () succeeded. */
|
|
server->sysdeps.cpu = _glibtop_sysdeps_cpu;
|
|
}
|
|
|
|
/* Provides information about cpu usage. */
|
|
|
|
void
|
|
glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)
|
|
{
|
|
long cpts [CPUSTATES];
|
|
/* sysctl vars*/
|
|
struct clockinfo ci;
|
|
size_t length;
|
|
|
|
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_CPU), 0);
|
|
|
|
memset (buf, 0, sizeof (glibtop_cpu));
|
|
|
|
/* If this fails, the nlist may not be valid. */
|
|
if (server->sysdeps.cpu == 0)
|
|
return;
|
|
|
|
if (kvm_read (server->machine.kd, nlst [0].n_value,
|
|
&cpts, sizeof (cpts)) != sizeof (cpts)) {
|
|
glibtop_warn_io_r (server, "kvm_read (cp_time)");
|
|
return;
|
|
}
|
|
|
|
/* Get the clockrate data */
|
|
length = sizeof (struct clockinfo);
|
|
if (sysctl (mib, mib_length, &ci, &length, NULL, 0)) {
|
|
glibtop_warn_io_r (server, "sysctl");
|
|
return;
|
|
}
|
|
|
|
/* set user time */
|
|
buf->user = cpts [CP_USER];
|
|
/* set nice time */
|
|
buf->nice = cpts [CP_NICE];
|
|
/* set sys time */
|
|
buf->sys = cpts [CP_SYS];
|
|
/* set idle time */
|
|
buf->idle = cpts [CP_IDLE];
|
|
|
|
/* set frequency */
|
|
/*
|
|
FIXME -- is hz, tick, profhz or stathz wanted?
|
|
buf->frequency = sysctl("kern.clockrate", ...);
|
|
|
|
struct clockinfo
|
|
*/
|
|
buf->frequency = ci.hz;
|
|
/* set total */
|
|
buf->total = cpts [CP_USER] + cpts [CP_NICE]
|
|
+ cpts [CP_SYS] + cpts [CP_IDLE];
|
|
|
|
/* Set the flags last. */
|
|
buf->flags = _glibtop_sysdeps_cpu;
|
|
}
|