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dacb2beb73556aef3e41629a3250174b2a7f4b4e
lcdproc/clients/lcdproc/cpu.c
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mmdolze 66023939a1 Cleanup and documentation updates: 
- Remove shared/str.h where not used.
- Remove shared/debug.h from all files as it has been completely replaced
  by shared/report.h (it will be removed later).
- Add more doxygen comments to shared/* and clients/lcdproc/*.
- Include static functions in doxygen output.
2010-02-02 23:20:29 +00:00

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/** \file clients/lcdproc/cpu.c
* Implements the 'CPU' and 'CPUGraph' screens.
*/
/*-
* This file is part of lcdproc, the lcdproc client.
*
* This file is released under the GNU General Public License.
* Refer to the COPYING file distributed with this package.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include "shared/sockets.h"
#include "main.h"
#include "mode.h"
#include "machine.h"
#include "cpu.h"
#include "util.h"
/**
* CPU screen shows info about percentage of the CPU being used
*
*\verbatim
*
* +--------------------+ +--------------------+
* |## CPU 51.9%: myh #@| |CPU [---- ]48.1%@|
* |Usr 46.0% Nice 0.0%| |U-- S- N I--- |
* |Sys 5.9% Idle 48.1%| +--------------------+
* |0%-------- 100%|
* +--------------------+
*
*\endverbatim
*
* \param rep Time since last screen update
* \param display 1 if screen is visible or data should be updated
* \param flags_ptr Mode flags
* \return Always 0
*/
int
cpu_screen(int rep, int display, int *flags_ptr)
{
#undef CPU_BUF_SIZE
#define CPU_BUF_SIZE 4
static double cpu[CPU_BUF_SIZE + 1][5]; // last buffer is scratch
static int gauge_wid = 0;
static int usni_wid = 0;
int i, j, n;
double value;
load_type load;
char tmp[25]; // should be large enough
if ((*flags_ptr & INITIALIZED) == 0) {
*flags_ptr |= INITIALIZED;
sock_send_string(sock, "screen_add C\n");
sock_printf(sock, "screen_set C -name {CPU Use: %s}\n", get_hostname());
if (lcd_hgt >= 4) {
gauge_wid = lcd_wid - 6; // room between 0%...100%
sock_send_string(sock, "widget_add C title title\n");
sock_send_string(sock, "widget_set C title {CPU LOAD}\n");
sock_send_string(sock, "widget_add C one string\n");
sock_send_string(sock, "widget_add C two string\n");
sock_send_string(sock, "widget_add C three string\n");
sock_printf(sock, "widget_set C one 1 2 {%-*s%-*s}\n",
lcd_wid / 2, "Usr", lcd_wid / 2, "Nice");
sock_printf(sock, "widget_set C two 1 3 {%-*s%-*s}\n",
lcd_wid / 2, "Sys", lcd_wid / 2, "Idle");
sock_printf(sock, "widget_set C three 1 4 {0%%%*s100%%}\n", gauge_wid, "");
sock_send_string(sock, "widget_add C usr string\n");
sock_send_string(sock, "widget_add C nice string\n");
sock_send_string(sock, "widget_add C idle string\n");
sock_send_string(sock, "widget_add C sys string\n");
sock_send_string(sock, "widget_add C bar hbar\n");
sock_send_string(sock, "widget_set C bar 3 4 0\n");
}
else {
usni_wid = (lcd_wid - 4) / 4; // 4 gauges + 1 letter for each
gauge_wid = lcd_wid - 12; // room between [...]
sock_send_string(sock, "widget_add C cpu string\n");
sock_printf(sock, "widget_set C cpu 1 1 {CPU [%*s]}\n", gauge_wid, "");
sock_send_string(sock, "widget_add C cpu% string\n");
sock_printf(sock, "widget_set C cpu%% 1 %d { 0.0%%}\n", lcd_wid - 5);
sock_send_string(sock, "widget_add C usni string\n");
sock_printf(sock, "widget_set C usni 1 2 {U%*sS%*sN%*sI%*s}\n",
usni_wid, "", usni_wid, "", usni_wid, "", usni_wid, "");
sock_send_string(sock, "widget_add C usr hbar\n");
sock_send_string(sock, "widget_add C sys hbar\n");
sock_send_string(sock, "widget_add C nice hbar\n");
sock_send_string(sock, "widget_add C idle hbar\n");
sock_send_string(sock, "widget_add C total hbar\n");
sock_send_string(sock, "widget_set C total 6 1 0\n");
}
return(0);
}
machine_get_load(&load);
// Shift values over by one
for (i = 0; i < (CPU_BUF_SIZE - 1); i++)
for (j = 0; j < 5; j++)
cpu[i][j] = cpu[i + 1][j];
// Read new data
if (load.total > 0L) {
cpu[CPU_BUF_SIZE - 1][0] = 100.0 * ((double) load.user / (double) load.total);
cpu[CPU_BUF_SIZE - 1][1] = 100.0 * ((double) load.system / (double) load.total);
cpu[CPU_BUF_SIZE - 1][2] = 100.0 * ((double) load.nice / (double) load.total);
cpu[CPU_BUF_SIZE - 1][3] = 100.0 * ((double) load.idle / (double) load.total);
cpu[CPU_BUF_SIZE - 1][4] = 100.0 * (((double) load.user + (double) load.system + (double) load.nice) / (double) load.total);
}
else {
cpu[CPU_BUF_SIZE - 1][0] = 0.0;
cpu[CPU_BUF_SIZE - 1][1] = 0.0;
cpu[CPU_BUF_SIZE - 1][2] = 0.0;
cpu[CPU_BUF_SIZE - 1][3] = 0.0;
cpu[CPU_BUF_SIZE - 1][4] = 0.0;
}
/*
// Only clear on first display...
if (!rep) {
// Make all the same, if this is the first time...
for (i=0; i < CPU_BUF_SIZE-1; i++)
for (j=0; j < 5; j++)
cpu[i][j] = cpu[CPU_BUF_SIZE-1][j];
}
*/
// Average values for final result
for (i = 0; i < 5; i++) {
value = 0.0;
for (j = 0; j < CPU_BUF_SIZE; j++)
value += cpu[j][i];
value /= CPU_BUF_SIZE;
cpu[CPU_BUF_SIZE][i] = value;
}
if (!display)
return(0);
if (lcd_hgt >= 4) { // 4-line display
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][4]);
sock_printf(sock, "widget_set C title {CPU %5s: %s}\n", tmp, get_hostname());
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][0]);
sock_printf(sock, "widget_set C usr %i 2 {%5s}\n", (lcd_wid / 2) - 5, tmp);
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][1]);
sock_printf(sock, "widget_set C sys %i 3 {%5s}\n", (lcd_wid / 2) - 5, tmp);
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][2]);
sock_printf(sock, "widget_set C nice %i 2 {%5s}\n", lcd_wid - 4, tmp);
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][3]);
sock_printf(sock, "widget_set C idle %i 3 {%5s}\n", lcd_wid - 4, tmp);
n = (int) ((cpu[CPU_BUF_SIZE][4] * lcd_cellwid * gauge_wid) / 100.0);
sock_printf(sock, "widget_set C bar 3 4 %d\n", n);
}
else { // 2-line display
sprintf_percent(tmp, cpu[CPU_BUF_SIZE][4]);
sock_printf(sock, "widget_set C cpu%% %d 1 {%5s}\n", lcd_wid - 5, tmp);
n = (int) ((cpu[CPU_BUF_SIZE][4] * lcd_cellwid * gauge_wid) / 100.0);
sock_printf(sock, "widget_set C total 6 1 %d\n", n);
n = (int) ((cpu[CPU_BUF_SIZE][0] * lcd_cellwid * usni_wid) / 100.0);
sock_printf(sock, "widget_set C usr %d 2 %d\n", 0 * (usni_wid + 1) + 2, n);
n = (int) ((cpu[CPU_BUF_SIZE][1] * lcd_cellwid * usni_wid) / 100.0);
sock_printf(sock, "widget_set C sys %d 2 %d\n", 1 * (usni_wid + 1) + 2, n);
n = (int) ((cpu[CPU_BUF_SIZE][2] * lcd_cellwid * usni_wid) / 100.0);
sock_printf(sock, "widget_set C nice %d 2 %d\n", 2 * (usni_wid + 1) + 2, n);
n = (int) ((cpu[CPU_BUF_SIZE][3] * lcd_cellwid * usni_wid) / 100.0);
sock_printf(sock, "widget_set C idle %d 2 %d\n", 3 * (usni_wid + 1) + 2, n);
}
return(0);
} // End cpu_screen()
/**
* Cpu Graph Screen shows a quick-moving histogram of CPU use.
*
*\verbatim
*
* +--------------------+ +--------------------+
* |## CPU: myhost ####@| |CPU: myhos|| @|
* | || | | |||| |
* | ||| | +--------------------+
* | |||| |
* +--------------------+
*
*\endverbatim
*
* \param rep Time since last screen update
* \param display 1 if screen is visible or data should be updated
* \param flags_ptr Mode flags
* \return Always 0
*/
int
cpu_graph_screen(int rep, int display, int *flags_ptr)
{
#undef CPU_BUF_SIZE
#define CPU_BUF_SIZE 2
static double cpu[CPU_BUF_SIZE];
static int cpu_past[LCD_MAX_WIDTH];
static int gauge_hgt = 0;
int i, n = 0;
double value ;
load_type load;
if ((*flags_ptr & INITIALIZED) == 0) {
*flags_ptr |= INITIALIZED;
gauge_hgt = (lcd_hgt > 2) ? (lcd_hgt - 1) : lcd_hgt;
sock_send_string(sock, "screen_add G\n");
sock_printf(sock, "screen_set G -name {CPU Graph: %s}\n", get_hostname());
if (lcd_hgt >= 4) {
sock_send_string(sock, "widget_add G title title\n");
sock_printf(sock, "widget_set G title {CPU: %s}\n", get_hostname());
}
else {
sock_send_string(sock, "widget_add G title string\n");
sock_printf(sock, "widget_set G title 1 1 {CPU: %s}\n", get_hostname());
}
for (i = 1; i <= lcd_wid; i++) {
sock_printf(sock, "widget_add G bar%d vbar\n", i);
sock_printf(sock, "widget_set G bar%d %d %d 0\n", i, i, lcd_hgt);
cpu_past[i-1] = 0;
};
// Clear out CPU averaging array
for (i = 0; i < CPU_BUF_SIZE ; i++)
cpu[i] = 0.;
}
// Shift values over by one
for (i = 0; i < (CPU_BUF_SIZE-1); i++)
cpu[i] = cpu[i+1];
// Read and save new data
machine_get_load(&load);
cpu[CPU_BUF_SIZE-1] = (load.total > 0L)
? ((double) load.user + (double) load.system + (double) load.nice) / (double) load.total
: 0;
// Average values for final result
value = 0.0;
for (i = 0; i < CPU_BUF_SIZE; i++)
value += cpu[i];
value /= CPU_BUF_SIZE;
// Scale result to available height (leave 1st line free when height > 2)
n = (int) (value * lcd_cellhgt * gauge_hgt);
// Shift and update display the graph
for (i = 0; i < lcd_wid - 1; i++) {
cpu_past[i] = cpu_past[i + 1];
if (display) {
sock_printf(sock, "widget_set G bar%d %d %d %d\n",
i + 1, i + 1, lcd_hgt, cpu_past[i]);
}
}
// Save the newest entry and display it
cpu_past[lcd_wid - 1] = n;
if (display) {
sock_printf(sock, "widget_set G bar%d %d %d %d\n", lcd_wid, lcd_wid, lcd_hgt, n);
}
return(0);
} // End cpu_graph_screen()
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