mirror of
https://github.com/edeproject/ede.git
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516 lines
12 KiB
C++
516 lines
12 KiB
C++
/*
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* IceWM
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*
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* Copyright (C) 1998-2001 Marko Macek
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*
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* CPU Status
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*
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* For eWorkPanel by Mikko Lahteenmaki 2003
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* For ede-panel by Sanel Zukan 2009
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*/
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#include <limits.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <FL/Fl.H>
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#include <FL/Fl_Group.H>
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#include <FL/fl_draw.H>
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#include <edelib/Nls.h>
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#if defined(linux)
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# include <sys/sysinfo.h>
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#endif
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#ifdef HAVE_KSTAT_H
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# include <kstat.h>
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#endif
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#ifdef __FreeBSD__
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# include <sys/param.h>
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# include <sys/sysctl.h>
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# if __FreeBSD_version < 500101
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# include <sys/dkstat.h>
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# else
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# include <sys/resource.h>
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# endif
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# include <sys/stat.h>
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#endif
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#include "Applet.h"
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#include "CpuMonitor.h"
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#ifdef __FreeBSD__
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/* The part ripped from top... */
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/*
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* Top users/processes display for Unix
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* Version 3
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*
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* This program may be freely redistributed,
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* but this entire comment MUST remain intact.
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*
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* Copyright (c) 1984, 1989, William LeFebvre, Rice University
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* Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
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*/
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/*
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* percentages(cnt, out, new, old, diffs) - calculate percentage change
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* between array "old" and "new", putting the percentages i "out".
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* "cnt" is size of each array and "diffs" is used for scratch space.
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* The array "old" is updated on each call.
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* The routine assumes modulo arithmetic. This function is especially
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* useful on BSD mchines for calculating cpu state percentages.
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*/
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static long cp_time[CPUSTATES];
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static long cp_old[CPUSTATES];
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static long cp_diff[CPUSTATES];
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static int cpu_states[CPUSTATES];
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long percentages(int cnt, int *out, long *my_new, long *old, long *diffs)
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{
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register int i;
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register long change;
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register long total_change;
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register long *dp;
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long half_total;
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/* initialization */
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total_change = 0;
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dp = diffs;
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/* calculate changes for each state and the overall change */
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for (i = 0; i < cnt; i++)
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{
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if ((change = *my_new - *old) < 0)
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{
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/* this only happens when the counter wraps */
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change = (int)
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((unsigned long)*my_new-(unsigned long)*old);
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}
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total_change += (*dp++ = change);
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*old++ = *my_new++;
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}
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/* avoid divide by zero potential */
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if (total_change == 0)
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{
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total_change = 1;
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}
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/* calculate percentages based on overall change, rounding up */
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half_total = total_change / 2l;
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/* Do not divide by 0. Causes Floating point exception */
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if(total_change) {
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for (i = 0; i < cnt; i++)
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{
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*out++ = (int)((*diffs++ * 1000 + half_total) / total_change);
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}
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}
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/* return the total in case the caller wants to use it */
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return total_change;
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}
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#endif /* freebsd */
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#define UPDATE_INTERVAL .5f
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void cpu_timeout_cb(void *d) {
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((CPUMonitor*)d)->update_status();
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Fl::repeat_timeout(UPDATE_INTERVAL, cpu_timeout_cb, d);
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}
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CPUMonitor::CPUMonitor() : Fl_Box(0, 0, 45, 25)
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{
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box(FL_THIN_DOWN_BOX);
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m_draw_label = true;
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m_samples = m_old_samples = -1;
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cpu = 0;
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colors[IWM_USER] = FL_RED;
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colors[IWM_NICE] = FL_GREEN;
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colors[IWM_SYS] = FL_DARK3;
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colors[IWM_IDLE] = FL_BACKGROUND_COLOR;
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layout();
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}
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void CPUMonitor::clear()
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{
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if(!cpu) return;
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for (int i = 0; i < samples(); i++)
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delete cpu[i];
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delete cpu;
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cpu = 0;
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m_old_samples = -1;
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}
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void CPUMonitor::draw()
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{
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draw_box();
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if(!cpu && label()) {
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draw_label();
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return;
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}
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int n, c, user, nice, sys, idle, total;
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int W = w() - Fl::box_dw(box());
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int H = h() - Fl::box_dh(box());
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int X = x() + Fl::box_dx(box());
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int Y = y() + Fl::box_dy(box());
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fl_push_clip(X, Y, W, H);
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c = 0;
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for (int i = X; i < samples() + X; i++) {
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user = cpu[c][IWM_USER];
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nice = cpu[c][IWM_NICE];
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sys = cpu[c][IWM_SYS];
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idle = cpu[c][IWM_IDLE];
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total = user + sys + nice + idle;
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c++;
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int y = Y + H;
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if (total > 0) {
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if (sys) {
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n = (H * (total - sys)) / total; // check rounding
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if (n >= y) n = y;
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if (n < 1) n = 1;
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fl_color(colors[IWM_SYS]);
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fl_line(i, y, i, n);
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y = n - 1;
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}
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if (nice) {
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n = (H * (total - sys - nice)) / total;
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if (n >= y) n = y;
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if (n < 1) n = 1;
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fl_color(colors[IWM_NICE]);
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fl_line(i, y, i, n);
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y = n - 1;
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}
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if (user) {
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n = (H * (total - sys - nice - user)) / total;
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if (n >= y) n = y;
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if (n < 1) n = 1;
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fl_color(colors[IWM_USER]);
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fl_line(i, y, i, n);
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y = n - 1;
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}
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}
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if (idle) {
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if(colors[IWM_IDLE] != FL_BACKGROUND_COLOR) {
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fl_color(colors[IWM_IDLE]);
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fl_line(i, Fl::box_dy(box()), i, y);
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}
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}
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}
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draw_label();
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fl_pop_clip();
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}
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void CPUMonitor::layout() {
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m_samples = w() - Fl::box_dw(box());
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if(!cpu || m_old_samples != m_samples) {
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clear();
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cpu = new int*[m_samples];
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for(int i=0; i < m_samples; i++) {
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cpu[i] = new int[IWM_STATES];
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cpu[i][IWM_USER] = cpu[i][IWM_NICE] = cpu[i][IWM_SYS] = 0;
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cpu[i][IWM_IDLE] = 1;
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}
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last_cpu[IWM_USER] = last_cpu[IWM_NICE] = last_cpu[IWM_SYS] = last_cpu[IWM_IDLE] = 0;
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update_status();
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m_old_samples = m_samples;
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}
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}
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int CPUMonitor::handle(int e) {
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switch(e) {
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case FL_SHOW: {
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int ret = Fl_Box::handle(e);
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Fl::add_timeout(UPDATE_INTERVAL, cpu_timeout_cb, this);
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return ret;
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}
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case FL_HIDE:
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Fl::remove_timeout(cpu_timeout_cb);
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/* fallthrough */
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}
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return Fl_Box::handle(e);
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}
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void CPUMonitor::update_status() {
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if(!cpu) return;
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for (int i=1; i < samples(); i++) {
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cpu[i - 1][IWM_USER] = cpu[i][IWM_USER];
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cpu[i - 1][IWM_NICE] = cpu[i][IWM_NICE];
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cpu[i - 1][IWM_SYS] = cpu[i][IWM_SYS];
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cpu[i - 1][IWM_IDLE] = cpu[i][IWM_IDLE];
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}
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get_cpu_info();
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// Update tooltip
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static char load[255];
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snprintf(load, sizeof(load)-1,
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_("CPU Load\n"
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"User: %d%%\n"
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"Nice: %d%%\n"
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"Sys: %d%%\n"
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"Idle: %d%%"),
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cpu[samples()-1][0]*2, cpu[samples()-1][1]*2,
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cpu[samples()-1][2]*2, cpu[samples()-1][3]*2);
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// Update label
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int cpu_percent = cpu[samples()-1][0]*2;
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if(m_draw_label && cpu_percent<=100) {
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static char buf[16];
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snprintf(buf, sizeof(buf), "%i%%", cpu_percent);
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label(buf);
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}
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tooltip(load);
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}
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void CPUMonitor::get_cpu_info() {
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if(!cpu) return;
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#ifdef linux
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char *p, buf[128];
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long cur[IWM_STATES];
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int len, fd = open("/proc/stat", O_RDONLY);
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cpu[samples()-1][IWM_USER] = 0;
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cpu[samples()-1][IWM_NICE] = 0;
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cpu[samples()-1][IWM_SYS] = 0;
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cpu[samples()-1][IWM_IDLE] = 0;
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if (fd == -1)
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return;
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len = read(fd, buf, sizeof(buf) - 1);
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if (len != sizeof(buf) - 1) {
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close(fd);
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return;
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}
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buf[len] = 0;
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p = buf;
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while (*p && (*p < '0' || *p > '9'))
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p++;
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for (int i = 0; i < 4; i++) {
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cur[i] = strtoul(p, &p, 10);
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cpu[samples()-1][i] = cur[i] - last_cpu[i];
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last_cpu[i] = cur[i];
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}
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close(fd);
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#if 0
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fprintf(stderr, "cpu: %d %d %d %d\n",
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cpu[samples()-1][IWM_USER], cpu[samples()-1][IWM_NICE],
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cpu[samples()-1][IWM_SYS], cpu[samples()-1][IWM_IDLE]);
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#endif
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#endif /* linux */
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#ifdef HAVE_KSTAT_H
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# ifdef HAVE_OLD_KSTAT
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# define ui32 ul
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#endif
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static kstat_ctl_t *kc = NULL;
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static kid_t kcid;
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kid_t new_kcid;
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kstat_t *ks = NULL;
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kstat_named_t *kn = NULL;
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int changed,change,total_change;
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unsigned int thiscpu;
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register int i,j;
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static unsigned int ncpus;
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static kstat_t **cpu_ks=NULL;
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static cpu_stat_t *cpu_stat=NULL;
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static long cp_old[CPU_STATES];
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long cp_time[CPU_STATES], cp_pct[CPU_STATES];
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/* Initialize the kstat */
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if (!kc) {
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kc = kstat_open();
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if (!kc) {
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perror("kstat_open ");
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return;/* FIXME : need err handler? */
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}
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changed = 1;
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kcid = kc->kc_chain_id;
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fcntl(kc->kc_kd, F_SETFD, FD_CLOEXEC);
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} else {
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changed = 0;
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}
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/* Fetch the kstat data. Whenever we detect that the kstat has been
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changed by the kernel, we 'continue' and restart this loop.
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Otherwise, we break out at the end. */
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while (1) {
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new_kcid = kstat_chain_update(kc);
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if (new_kcid) {
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changed = 1;
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kcid = new_kcid;
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}
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if (new_kcid < 0) {
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perror("kstat_chain_update ");
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return;/* FIXME : need err handler? */
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}
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if (new_kcid != 0)
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continue; /* kstat changed - start over */
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ks = kstat_lookup(kc, "unix", 0, "system_misc");
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if (kstat_read(kc, ks, 0) == -1) {
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perror("kstat_read ");
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return;/* FIXME : need err handler? */
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}
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if (changed) {
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/* the kstat has changed - reread the data */
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thiscpu = 0; ncpus = 0;
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kn = (kstat_named_t *)kstat_data_lookup(ks, "ncpus");
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if ((kn) && (kn->value.ui32 > ncpus)) {
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/* I guess I should be using 'new' here... FIXME */
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ncpus = kn->value.ui32;
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if ((cpu_ks = (kstat_t **)
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realloc(cpu_ks, ncpus * sizeof(kstat_t *))) == NULL)
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{
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perror("realloc: cpu_ks ");
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return;/* FIXME : need err handler? */
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}
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if ((cpu_stat = (cpu_stat_t *)
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realloc(cpu_stat, ncpus * sizeof(cpu_stat_t))) == NULL)
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{
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perror("realloc: cpu_stat ");
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return;/* FIXME : need err handler? */
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}
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}
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for (ks = kc->kc_chain; ks; ks = ks->ks_next) {
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if (strncmp(ks->ks_name, "cpu_stat", 8) == 0) {
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new_kcid = kstat_read(kc, ks, NULL);
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if (new_kcid < 0) {
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perror("kstat_read ");
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return;/* FIXME : need err handler? */
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}
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if (new_kcid != kcid)
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break;
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cpu_ks[thiscpu] = ks;
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thiscpu++;
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if (thiscpu > ncpus) {
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fprintf(stderr, "kstat finds too many cpus: should be %d", ncpus);
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return;/* FIXME : need err handler? */
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}
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}
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}
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if (new_kcid != kcid)
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continue;
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ncpus = thiscpu;
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changed = 0;
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}
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for (i = 0; i<(int)ncpus; i++) {
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new_kcid = kstat_read(kc, cpu_ks[i], &cpu_stat[i]);
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if (new_kcid < 0) {
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perror("kstat_read ");
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return;/* FIXME : need err handler? */
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}
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}
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if (new_kcid != kcid)
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continue; /* kstat changed - start over */
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else
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break;
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} /* while (1) */
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/* Initialize the cp_time array */
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for (i = 0; i < CPU_STATES; i++)
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cp_time[i] = 0L;
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for (i = 0; i < (int)ncpus; i++) {
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for (j = 0; j < CPU_STATES; j++)
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cp_time[j] += (long) cpu_stat[i].cpu_sysinfo.cpu[j];
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}
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/* calculate the percent utilization for each category */
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/* cpu_state calculations */
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total_change = 0;
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for (i = 0; i < CPU_STATES; i++) {
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change = cp_time[i] - cp_old[i];
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if (change < 0) /* The counter rolled over */
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change = (int) ((unsigned long)cp_time[i] - (unsigned long)cp_old[i]);
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cp_pct[i] = change;
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total_change += change;
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cp_old[i] = cp_time[i]; /* copy the data for the next run */
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}
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/* this percent calculation isn't really needed, since the repaint
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routine takes care of this... */
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for (i = 0; i < CPU_STATES; i++)
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cp_pct[i] =
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((total_change > 0) ?
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((int)(((1000.0 * (float)cp_pct[i]) / total_change) + 0.5)) :
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((i == CPU_IDLE) ? (1000) : (0)));
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/* OK, we've got the data. Now copy it to cpu[][] */
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cpu[samples()-1][IWM_USER] = cp_pct[CPU_USER];
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cpu[samples()-1][IWM_NICE] = cp_pct[CPU_WAIT];
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cpu[samples()-1][IWM_SYS] = cp_pct[CPU_KERNEL];
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cpu[samples()-1][IWM_IDLE] = cp_pct[CPU_IDLE];
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#endif /* have_kstat_h */
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#ifdef __FreeBSD__
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size_t len = sizeof(cp_time);
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cpu[samples()-1][IWM_USER] = 0;
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cpu[samples()-1][IWM_NICE] = 0;
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cpu[samples()-1][IWM_SYS] = 0;
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cpu[samples()-1][IWM_IDLE] = 0;
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if (sysctlbyname("kern.cp_time", &cp_time, &len, NULL, 0) == -1)
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return; /* FIXME : need err handler? */
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percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);
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// Translate FreeBSD stuff into ours (probably the same thing anyway)
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cpu[samples()-1][IWM_USER] = cp_diff[CP_USER];
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cpu[samples()-1][IWM_NICE] = cp_diff[CP_NICE];
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cpu[samples()-1][IWM_SYS] = cp_diff[CP_SYS];
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cpu[samples()-1][IWM_IDLE] = cp_diff[CP_IDLE];
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#if 0
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fprintf(stderr, "cpu: %d %d %d %d\n",
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cpu[samples()-1][IWM_USER], cpu[samples()-1][IWM_NICE],
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cpu[samples()-1][IWM_SYS], cpu[samples()-1][IWM_IDLE]);
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#endif
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#endif /* freebsd */
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}
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EDE_PANEL_APPLET_EXPORT (
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CPUMonitor,
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EDE_PANEL_APPLET_OPTION_ALIGN_RIGHT,
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"CPU monitor",
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"0.1",
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"empty",
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"various"
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)
|