source: mainline/uspace/app/top/top.c@ acc3f745

/*
 * Copyright (c) 2010 Stanislav Kozina
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup top
 * @brief Top utility.
 * @{
 */
/**
 * @file
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <uptime.h>
#include <task.h>
#include <thread.h>
#include <sys/time.h>
#include <load.h>
#include "screen.h"
#include "input.h"
#include "top.h"
#include "ps.h"

#define UPDATE_INTERVAL 1

#define DAY 86400
#define HOUR 3600
#define MINUTE 60

int number = 0;
int number2 = 0;
static void read_data(data_t *target)
{
        /* Read current time */
        struct timeval time;
        if (gettimeofday(&time, NULL) != 0) {
                printf("Cannot get time of day!\n");
                exit(1);
        }
        target->hours = (time.tv_sec % DAY) / HOUR;
        target->minutes = (time.tv_sec % HOUR) / MINUTE;
        target->seconds = time.tv_sec % MINUTE;

        /* Read uptime */
        uint64_t uptime;
        get_uptime(&uptime);
        target->uptime_d = uptime / DAY;
        target->uptime_h = (uptime % DAY) / HOUR;
        target->uptime_m = (uptime % HOUR) / MINUTE;
        target->uptime_s = uptime % MINUTE;

        /* Read load */
        get_load(target->load);

        /* Read task ids */
        target->task_count = get_tasks(&target->taskinfos);

        /* Read cpu infos */
        target->cpu_count = get_cpu_infos(&target->cpus);
}

/** Computes percentage differencies from old_data to new_data
 *
 * @param old_data      Pointer to old data strucutre.
 * @param new_data      Pointer to actual data where percetages are stored.
 *
 */
static void compute_percentages(data_t *old_data, data_t *new_data)
{
        /* Foreach cpu, compute total ticks and divide it between user and
         * system */
        unsigned int i;
        new_data->cpu_perc = malloc(new_data->cpu_count * sizeof(cpu_perc_t));
        for (i = 0; i < new_data->cpu_count; ++i) {
                uint64_t idle = new_data->cpus[i].idle_ticks - old_data->cpus[i].idle_ticks;
                uint64_t busy = new_data->cpus[i].busy_ticks - old_data->cpus[i].busy_ticks;
                uint64_t sum = idle + busy;
                new_data->cpu_perc[i].idle = (float)(idle * 100) / sum;
                new_data->cpu_perc[i].busy = (float)(busy * 100) / sum;
        }

        /* For all tasks compute sum and differencies of all cycles */
        uint64_t pages_total = 0;
        uint64_t ucycles_total = 0;
        uint64_t kcycles_total = 0;
        uint64_t *ucycles_diff = malloc(new_data->task_count * sizeof(uint64_t));
        uint64_t *kcycles_diff = malloc(new_data->task_count * sizeof(uint64_t));
        unsigned int j = 0;
        for (i = 0; i < new_data->task_count; ++i) {
                /* Jump over all death tasks */
                while (old_data->taskinfos[j].taskid < new_data->taskinfos[i].taskid)
                        ++j;
                if (old_data->taskinfos[j].taskid > new_data->taskinfos[i].taskid) {
                        /* This is newly borned task, ignore it */
                        ucycles_diff[i] = 0;
                        kcycles_diff[i] = 0;
                        continue;
                }
                /* Now we now we have task with same id */
                ucycles_diff[i] = new_data->taskinfos[i].ucycles - old_data->taskinfos[j].ucycles;
                kcycles_diff[i] = new_data->taskinfos[i].kcycles - old_data->taskinfos[j].kcycles;

                pages_total += new_data->taskinfos[i].pages;
                ucycles_total += ucycles_diff[i];
                kcycles_total += kcycles_diff[i];
        }

        /* And now compute percental change */
        new_data->task_perc = malloc(new_data->task_count * sizeof(task_perc_t));
        for (i = 0; i < new_data->task_count; ++i) {
                new_data->task_perc[i].pages = (float)(new_data->taskinfos[i].pages * 100) / pages_total;
                new_data->task_perc[i].ucycles = (float)(ucycles_diff[i] * 100) / ucycles_total;
                new_data->task_perc[i].kcycles = (float)(kcycles_diff[i] * 100) / kcycles_total;
        }

        /* And free temporary structures */
        free(ucycles_diff);
        free(kcycles_diff);
}

static void free_data(data_t *target)
{
        free(target->taskinfos);
        free(target->cpus);
        free(target->cpu_perc);
        free(target->task_perc);
}

static inline void swap(data_t **first, data_t **second)
{
        data_t *temp;
        temp = *first;
        *first = *second;
        *second = temp;
}

static data_t data[2];

int main(int argc, char *argv[])
{
        data_t *data1 = &data[0];
        data_t *data2 = &data[1];
        screen_init();

        /* Read initial stats */
        printf("Reading initial data...\n");
        read_data(data1);
        /* Compute some rubbish to have initialised values */
        compute_percentages(data1, data1);

        /* And paint screen until death... */
        while (true) {
                char c = tgetchar(UPDATE_INTERVAL);
                if (c < 0) {
                        read_data(data2);
                        compute_percentages(data1, data2);
                        free_data(data1);
                        print_data(data2);
                        swap(&data1, &data2);
                        continue;
                }
                switch (c) {
                        case 'q':
                                clear_screen();
                                return 0;
                        default:
                                PRINT_WARNING("Unknown command: %c", c);
                                break;
                }

        }

        free_data(data1);
        free_data(data2);
        return 0;
}

/** @}
 */