430 lines
14 KiB
C
430 lines
14 KiB
C
/*
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* Copyright (c) 2012, The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google, Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define MAX_BUF_SIZE 64
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struct freq_info {
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unsigned freq;
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long unsigned time;
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};
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struct cpu_info {
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long unsigned utime, ntime, stime, itime, iowtime, irqtime, sirqtime;
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struct freq_info *freqs;
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int freq_count;
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};
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#define die(...) { fprintf(stderr, __VA_ARGS__); exit(EXIT_FAILURE); }
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static struct cpu_info old_total_cpu, new_total_cpu, *old_cpus, *new_cpus;
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static int cpu_count, delay, iterations;
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static char minimal, aggregate_freq_stats;
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static int get_cpu_count();
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static int get_cpu_count_from_file(char *filename);
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static long unsigned get_cpu_total_time(struct cpu_info *cpu);
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static int get_freq_scales_count(int cpu);
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static void print_stats();
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static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu,
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char print_freq);
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static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu);
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static void read_stats();
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static void read_freq_stats(int cpu);
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static char should_aggregate_freq_stats();
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static char should_print_freq_stats();
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static void usage(char *cmd);
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int main(int argc, char *argv[]) {
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struct cpu_info *tmp_cpus, tmp_total_cpu;
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int i, freq_count;
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delay = 3;
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iterations = -1;
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minimal = 0;
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aggregate_freq_stats = 0;
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for (i = 0; i < argc; i++) {
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if (!strcmp(argv[i], "-n")) {
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if (i + 1 >= argc) {
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fprintf(stderr, "Option -n expects an argument.\n");
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usage(argv[0]);
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exit(EXIT_FAILURE);
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}
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iterations = atoi(argv[++i]);
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continue;
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}
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if (!strcmp(argv[i], "-d")) {
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if (i + 1 >= argc) {
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fprintf(stderr, "Option -d expects an argument.\n");
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usage(argv[0]);
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exit(EXIT_FAILURE);
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}
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delay = atoi(argv[++i]);
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continue;
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}
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if (!strcmp(argv[i], "-m")) {
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minimal = 1;
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}
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if (!strcmp(argv[i], "-h")) {
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usage(argv[0]);
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exit(EXIT_SUCCESS);
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}
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}
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cpu_count = get_cpu_count();
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old_cpus = malloc(sizeof(struct cpu_info) * cpu_count);
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if (!old_cpus) die("Could not allocate struct cpu_info\n");
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new_cpus = malloc(sizeof(struct cpu_info) * cpu_count);
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if (!new_cpus) die("Could not allocate struct cpu_info\n");
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for (i = 0; i < cpu_count; i++) {
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old_cpus[i].freq_count = new_cpus[i].freq_count = get_freq_scales_count(i);
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new_cpus[i].freqs = malloc(sizeof(struct freq_info) * new_cpus[i].freq_count);
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if (!new_cpus[i].freqs) die("Could not allocate struct freq_info\n");
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old_cpus[i].freqs = malloc(sizeof(struct freq_info) * old_cpus[i].freq_count);
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if (!old_cpus[i].freqs) die("Could not allocate struct freq_info\n");
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}
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// Read stats without aggregating freq stats in the total cpu
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read_stats();
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aggregate_freq_stats = should_aggregate_freq_stats();
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if (aggregate_freq_stats) {
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old_total_cpu.freq_count = new_total_cpu.freq_count = new_cpus[0].freq_count;
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new_total_cpu.freqs = malloc(sizeof(struct freq_info) * new_total_cpu.freq_count);
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if (!new_total_cpu.freqs) die("Could not allocate struct freq_info\n");
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old_total_cpu.freqs = malloc(sizeof(struct freq_info) * old_total_cpu.freq_count);
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if (!old_total_cpu.freqs) die("Could not allocate struct freq_info\n");
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// Read stats again with aggregating freq stats in the total cpu
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read_stats();
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}
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while ((iterations == -1) || (iterations-- > 0)) {
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// Swap new and old cpu buffers;
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tmp_total_cpu = old_total_cpu;
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old_total_cpu = new_total_cpu;
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new_total_cpu = tmp_total_cpu;
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tmp_cpus = old_cpus;
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old_cpus = new_cpus;
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new_cpus = tmp_cpus;
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sleep(delay);
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read_stats();
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print_stats();
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}
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// Clean up
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if (aggregate_freq_stats) {
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free(new_total_cpu.freqs);
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free(old_total_cpu.freqs);
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}
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for (i = 0; i < cpu_count; i++) {
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free(new_cpus[i].freqs);
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free(old_cpus[i].freqs);
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}
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free(new_cpus);
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free(old_cpus);
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return 0;
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}
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/*
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* Get the number of CPUs of the system.
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*
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* Uses the two files /sys/devices/system/cpu/present and
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* /sys/devices/system/cpu/online to determine the number of CPUs. Expects the
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* format of both files to be either 0 or 0-N where N+1 is the number of CPUs.
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*
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* Exits if the present CPUs is not equal to the online CPUs
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*/
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static int get_cpu_count() {
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int cpu_count = get_cpu_count_from_file("/sys/devices/system/cpu/present");
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if (cpu_count != get_cpu_count_from_file("/sys/devices/system/cpu/online")) {
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die("present cpus != online cpus\n");
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}
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return cpu_count;
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}
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/*
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* Get the number of CPUs from a given filename.
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*/
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static int get_cpu_count_from_file(char *filename) {
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FILE *file;
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char line[MAX_BUF_SIZE];
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int cpu_count;
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file = fopen(filename, "r");
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if (!file) die("Could not open %s\n", filename);
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if (!fgets(line, MAX_BUF_SIZE, file)) die("Could not get %s contents\n", filename);
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fclose(file);
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if (strcmp(line, "0\n") == 0) {
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return 1;
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}
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if (1 == sscanf(line, "0-%d\n", &cpu_count)) {
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return cpu_count + 1;
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}
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die("Unexpected input in file %s (%s).\n", filename, line);
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return -1;
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}
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/*
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* Get the number of frequency states a given CPU can be scaled to.
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*/
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static int get_freq_scales_count(int cpu) {
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FILE *file;
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char filename[MAX_BUF_SIZE];
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long unsigned freq;
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int count = 0;
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sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu);
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file = fopen(filename, "r");
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if (!file) die("Could not open %s\n", filename);
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do {
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freq = 0;
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fscanf(file, "%lu %*d\n", &freq);
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if (freq) count++;
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} while(freq);
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fclose(file);
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return count;
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}
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/*
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* Read the CPU and frequency stats for all cpus.
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*/
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static void read_stats() {
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FILE *file;
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char scanline[MAX_BUF_SIZE];
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int i;
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file = fopen("/proc/stat", "r");
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if (!file) die("Could not open /proc/stat.\n");
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fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu %*d %*d %*d\n",
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&new_total_cpu.utime, &new_total_cpu.ntime, &new_total_cpu.stime, &new_total_cpu.itime,
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&new_total_cpu.iowtime, &new_total_cpu.irqtime, &new_total_cpu.sirqtime);
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if (aggregate_freq_stats) {
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for (i = 0; i < new_total_cpu.freq_count; i++) {
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new_total_cpu.freqs[i].time = 0;
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}
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}
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for (i = 0; i < cpu_count; i++) {
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sprintf(scanline, "cpu%d %%lu %%lu %%lu %%lu %%lu %%lu %%lu %%*d %%*d %%*d\n", i);
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fscanf(file, scanline, &new_cpus[i].utime, &new_cpus[i].ntime, &new_cpus[i].stime,
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&new_cpus[i].itime, &new_cpus[i].iowtime, &new_cpus[i].irqtime,
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&new_cpus[i].sirqtime);
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read_freq_stats(i);
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}
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fclose(file);
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}
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/*
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* Read the frequency stats for a given cpu.
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*/
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static void read_freq_stats(int cpu) {
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FILE *file;
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char filename[MAX_BUF_SIZE];
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int i;
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sprintf(filename, "/sys/devices/system/cpu/cpu%d/cpufreq/stats/time_in_state", cpu);
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file = fopen(filename, "r");
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if (!file) die("Could not open %s\n", filename);
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for (i = 0; i < new_cpus[cpu].freq_count; i++) {
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fscanf(file, "%u %lu\n", &new_cpus[cpu].freqs[i].freq,
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&new_cpus[cpu].freqs[i].time);
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if (aggregate_freq_stats) {
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new_total_cpu.freqs[i].freq = new_cpus[cpu].freqs[i].freq;
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new_total_cpu.freqs[i].time += new_cpus[cpu].freqs[i].time;
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}
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}
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fclose(file);
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}
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/*
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* Get the sum of the cpu time from all categories.
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*/
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static long unsigned get_cpu_total_time(struct cpu_info *cpu) {
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return (cpu->utime + cpu->ntime + cpu->stime + cpu->itime + cpu->iowtime + cpu->irqtime +
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cpu->sirqtime);
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}
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/*
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* Print the stats for all CPUs.
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*/
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static void print_stats() {
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char label[8];
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int i, j;
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char print_freq;
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print_freq = should_print_freq_stats();
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print_cpu_stats("Total", &new_total_cpu, &old_total_cpu, 1);
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for (i = 0; i < cpu_count; i++) {
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sprintf(label, "cpu%d", i);
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print_cpu_stats(label, &new_cpus[i], &old_cpus[i], print_freq);
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}
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printf("\n");
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}
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/*
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* Print the stats for a single CPU.
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*/
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static void print_cpu_stats(char *label, struct cpu_info *new_cpu, struct cpu_info *old_cpu,
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char print_freq) {
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long int total_delta_time;
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if (!minimal) {
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total_delta_time = get_cpu_total_time(new_cpu) - get_cpu_total_time(old_cpu);
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printf("%s: User %ld + Nice %ld + Sys %ld + Idle %ld + IOW %ld + IRQ %ld + SIRQ %ld = "
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"%ld\n", label,
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new_cpu->utime - old_cpu->utime,
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new_cpu->ntime - old_cpu->ntime,
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new_cpu->stime - old_cpu->stime,
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new_cpu->itime - old_cpu->itime,
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new_cpu->iowtime - old_cpu->iowtime,
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new_cpu->irqtime - old_cpu->irqtime,
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new_cpu->sirqtime - old_cpu->sirqtime,
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total_delta_time);
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if (print_freq) {
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print_freq_stats(new_cpu, old_cpu);
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}
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} else {
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printf("%s,%ld,%ld,%ld,%ld,%ld,%ld,%ld", label,
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new_cpu->utime - old_cpu->utime,
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new_cpu->ntime - old_cpu->ntime,
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new_cpu->stime - old_cpu->stime,
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new_cpu->itime - old_cpu->itime,
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new_cpu->iowtime - old_cpu->iowtime,
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new_cpu->irqtime - old_cpu->irqtime,
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new_cpu->sirqtime - old_cpu->sirqtime);
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print_freq_stats(new_cpu, old_cpu);
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printf("\n");
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}
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}
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/*
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* Print the CPU stats for a single CPU.
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*/
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static void print_freq_stats(struct cpu_info *new_cpu, struct cpu_info *old_cpu) {
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long int delta_time, total_delta_time;
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int i;
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if (new_cpu->freq_count > 0) {
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if (!minimal) {
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total_delta_time = 0;
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printf(" ");
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for (i = 0; i < new_cpu->freq_count; i++) {
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delta_time = new_cpu->freqs[i].time - old_cpu->freqs[i].time;
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total_delta_time += delta_time;
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printf("%ukHz %ld", new_cpu->freqs[i].freq, delta_time);
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if (i + 1 != new_cpu->freq_count) {
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printf(" + \n ");
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} else {
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printf(" = ");
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}
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}
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printf("%ld\n", total_delta_time);
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} else {
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for (i = 0; i < new_cpu->freq_count; i++) {
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printf(",%u,%ld", new_cpu->freqs[i].freq,
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new_cpu->freqs[i].time - old_cpu->freqs[i].time);
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}
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}
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}
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}
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/*
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* Determine if frequency stats should be printed.
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*
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* If the frequency stats are different between CPUs, the stats should be
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* printed for each CPU, else only the aggregate frequency stats should be
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* printed.
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*/
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static char should_print_freq_stats() {
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int i, j;
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for (i = 1; i < cpu_count; i++) {
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for (j = 0; j < new_cpus[i].freq_count; j++) {
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if (new_cpus[i].freqs[j].time - old_cpus[i].freqs[j].time !=
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new_cpus[0].freqs[j].time - old_cpus[0].freqs[j].time) {
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return 1;
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}
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}
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}
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return 0;
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}
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/*
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* Determine if the frequency stats should be aggregated.
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*
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* Only aggregate the frequency stats in the total cpu stats if the frequencies
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* reported by all CPUs are identical. Must be called after read_stats() has
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* been called once.
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*/
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static char should_aggregate_freq_stats() {
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int i, j;
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for (i = 1; i < cpu_count; i++) {
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if (new_cpus[i].freq_count != new_cpus[0].freq_count) {
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return 0;
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}
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for (j = 0; j < new_cpus[i].freq_count; j++) {
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if (new_cpus[i].freqs[j].freq != new_cpus[0].freqs[j].freq) {
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return 0;
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}
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}
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}
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return 1;
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}
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/*
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* Print the usage message.
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*/
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static void usage(char *cmd) {
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fprintf(stderr, "Usage %s [ -n iterations ] [ -d delay ] [ -c cpu ] [ -m ] [ -h ]\n"
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" -n num Updates to show before exiting.\n"
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" -d num Seconds to wait between updates.\n"
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" -m Display minimal output.\n"
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" -h Display this help screen.\n",
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cmd);
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}
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