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/*
KSysGuard, the KDE System Guard
Copyright (c) 1999 Chris Schlaeger <cs@kde.org>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <sys/dkstat.h>
#include <sys/sched.h> /* CPUSTATES */
#include <fcntl.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "CPU.h"
#include "Command.h"
#include "ksysguardd.h"
long percentages(int cnt, int *out, long *new, long *old, long *diffs);
struct nlist my_nlist[] = {
{"_cp_time"},
{ 0 }
};
kvm_t *kd;
unsigned long cp_time_offset;
long cp_time[CPUSTATES];
long cp_old[CPUSTATES];
long cp_diff[CPUSTATES];
int cpu_states[CPUSTATES];
void
initCpuInfo(struct SensorModul* sm)
{
/* Total CPU load */
registerMonitor("cpu/user", "integer", printCPUUser,
printCPUUserInfo, sm);
registerMonitor("cpu/nice", "integer", printCPUNice,
printCPUNiceInfo, sm);
registerMonitor("cpu/sys", "integer", printCPUSys,
printCPUSysInfo, sm);
registerMonitor("cpu/idle", "integer", printCPUIdle,
printCPUIdleInfo, sm);
kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open");
kvm_nlist(kd, my_nlist);
cp_time_offset = my_nlist[0].n_value;
updateCpuInfo();
}
void
exitCpuInfo(void)
{
kvm_close(kd);
}
int
updateCpuInfo(void)
{
kvm_read(kd, cp_time_offset, (char *)cp_time, sizeof(cp_time));
percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);
return (0);
}
void
printCPUUser(const char* cmd)
{
fprintf(CurrentClient, "%d\n", cpu_states[CP_USER]/10);
}
void
printCPUUserInfo(const char* cmd)
{
fprintf(CurrentClient, "CPU User Load\t0\t100\t%%\n");
}
void
printCPUNice(const char* cmd)
{
fprintf(CurrentClient, "%d\n", cpu_states[CP_NICE]/10);
}
void
printCPUNiceInfo(const char* cmd)
{
fprintf(CurrentClient, "CPU Nice Load\t0\t100\t%%\n");
}
void
printCPUSys(const char* cmd)
{
fprintf(CurrentClient, "%d\n", cpu_states[CP_SYS]/10);
}
void
printCPUSysInfo(const char* cmd)
{
fprintf(CurrentClient, "CPU System Load\t0\t100\t%%\n");
}
void
printCPUIdle(const char* cmd)
{
fprintf(CurrentClient, "%d\n", cpu_states[CP_IDLE]/10);
}
void
printCPUIdleInfo(const char* cmd)
{
fprintf(CurrentClient, "CPU Idle Load\t0\t100\t%%\n");
}
/* The part ripped from top... */
/*
* Top users/processes display for Unix
* Version 3
*
* This program may be freely redistributed,
* but this entire comment MUST remain intact.
*
* Copyright (c) 1984, 1989, William LeFebvre, Rice University
* Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
*/
/*
* percentages(cnt, out, new, old, diffs) - calculate percentage change
* between array "old" and "new", putting the percentages i "out".
* "cnt" is size of each array and "diffs" is used for scratch space.
* The array "old" is updated on each call.
* The routine assumes modulo arithmetic. This function is especially
* useful on BSD mchines for calculating cpu state percentages.
*/
long percentages(cnt, out, new, old, diffs)
int cnt;
int *out;
register long *new;
register long *old;
long *diffs;
{
register int i;
register long change;
register long total_change;
register long *dp;
long half_total;
/* initialization */
total_change = 0;
dp = diffs;
/* calculate changes for each state and the overall change */
for (i = 0; i < cnt; i++)
{
if ((change = *new - *old) < 0)
{
/* this only happens when the counter wraps */
change = (int)
((unsigned long)*new-(unsigned long)*old);
}
total_change += (*dp++ = change);
*old++ = *new++;
}
/* avoid divide by zero potential */
if (total_change == 0)
{
total_change = 1;
}
/* calculate percentages based on overall change, rounding up */
half_total = total_change / 2l;
/* Do not divide by 0. Causes Floating point exception */
if(total_change) {
for (i = 0; i < cnt; i++)
{
*out++ = (int)((*diffs++ * 1000 + half_total) / total_change);
}
}
/* return the total in case the caller wants to use it */
return(total_change);
}
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