toolbox/vmstat.c - platform/system/core - Gitiles

 /*
  * Copyright (c) 2008, The Android Open Source Project
  * 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.
  *  * Neither the name of Google, Inc. nor the names of its contributors
  *    may be used to endorse or promote products derived from this
  *    software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "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
  * COPYRIGHT OWNER OR CONTRIBUTORS 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.
  */

 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/param.h>
 #include <unistd.h>

 struct state {
     long procs_r;
     long procs_b;

     long mem_free;
     long mem_mapped;
     long mem_anon;
     long mem_slab;

     long sys_in;
     long sys_cs;
     long sys_flt;

     long cpu_us;
     long cpu_ni;
     long cpu_sy;
     long cpu_id;
     long cpu_wa;
     long cpu_ir;
     long cpu_si;
 };

 #define MAX_LINE 256

 char line[MAX_LINE];

 static void read_state(struct state *s);
 static int read_meminfo(struct state *s);
 static int read_stat(struct state *s);
 static int read_vmstat(struct state *s);
 static void print_header(void);
 static void print_line(struct state *old, struct state *new);
 static void usage(char *cmd);

 int vmstat_main(int argc, char *argv[]) {
     struct state s[2];
     int iterations, delay, header_interval;
     int toggle, count;
     int i;

     iterations = 0;
     delay = 1;
     header_interval = 20;

     for (i = 1; i < argc; i++) {
         if (!strcmp(argv[i], "-n")) {
             if (i >= argc - 1) {
                 fprintf(stderr, "Option -n requires an argument.\n");
                 exit(EXIT_FAILURE);
             }
             iterations = atoi(argv[++i]);
             continue;
         }
         if (!strcmp(argv[i], "-d")) {
             if (i >= argc - 1) {
                 fprintf(stderr, "Option -d requires an argument.\n");
                 exit(EXIT_FAILURE);
             }
             delay = atoi(argv[++i]);
             continue;
         }
         if (!strcmp(argv[i], "-r")) {
             if (i >= argc - 1) {
                 fprintf(stderr, "Option -r requires an argument.\n");
                 exit(EXIT_FAILURE);
             }
             header_interval = atoi(argv[++i]);
             continue;
         }
         if (!strcmp(argv[i], "-h")) {
             usage(argv[0]);
             exit(EXIT_SUCCESS);
         }
         fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]);
         usage(argv[0]);
 	exit(EXIT_FAILURE);
     }

     toggle = 0;
     count = 0;

     if (!header_interval)
         print_header();
     read_state(&s[1 - toggle]);
     while ((iterations == 0) || (iterations-- > 0)) {
         sleep(delay);
         read_state(&s[toggle]);
         if (header_interval) {
             if (count == 0)
                 print_header();
             count = (count + 1) % header_interval;
         }
         print_line(&s[1 - toggle], &s[toggle]);
         toggle = 1 - toggle;
     }

     return 0;
 }

 static void read_state(struct state *s) {
     int error;

     error = read_meminfo(s);
     if (error) {
         fprintf(stderr, "vmstat: could not read /proc/meminfo: %s\n", strerror(error));
         exit(EXIT_FAILURE);
     }

     error = read_stat(s);
     if (error) {
         fprintf(stderr, "vmstat: could not read /proc/stat: %s\n", strerror(error));
         exit(EXIT_FAILURE);
     }

     error = read_vmstat(s);
     if (error) {
         fprintf(stderr, "vmstat: could not read /proc/vmstat: %s\n", strerror(error));
         exit(EXIT_FAILURE);
     }
 }

 static int read_meminfo(struct state *s) {
     FILE *f;

     f = fopen("/proc/meminfo", "r");
     if (!f) return errno;

     while (fgets(line, MAX_LINE, f)) {
         sscanf(line, "MemFree: %ld kB", &s->mem_free);
         sscanf(line, "AnonPages: %ld kB", &s->mem_anon);
         sscanf(line, "Mapped: %ld kB", &s->mem_mapped);
         sscanf(line, "Slab: %ld kB", &s->mem_slab);
     }

     fclose(f);

     return 0;
 }

 static int read_stat(struct state *s) {
     FILE *f;

     f = fopen("/proc/stat", "r");
     if (!f) return errno;

     while (fgets(line, MAX_LINE, f)) {
         if (!strncmp(line, "cpu ", 4)) {
             sscanf(line, "cpu  %ld %ld %ld %ld %ld %ld %ld",
                 &s->cpu_us, &s->cpu_ni, &s->cpu_sy, &s->cpu_id, &s->cpu_wa,
                 &s->cpu_ir, &s->cpu_si);
         }
         sscanf(line, "intr %ld", &s->sys_in);
         sscanf(line, "ctxt %ld", &s->sys_cs);
         sscanf(line, "procs_running %ld", &s->procs_r);
         sscanf(line, "procs_blocked %ld", &s->procs_b);
     }

     fclose(f);

     return 0;
 }

 static int read_vmstat(struct state *s) {
     FILE *f;

     f = fopen("/proc/vmstat", "r");
     if (!f) return errno;

     while (fgets(line, MAX_LINE, f)) {
         sscanf(line, "pgmajfault %ld", &s->sys_flt);
     }

     fclose(f);

     return 0;
 }

 static void print_header(void) {
     printf("%-5s  %-27s  %-14s  %-17s\n", "procs", "memory", "system", "cpu");
     printf("%2s %2s  %6s %6s %6s %6s  %4s %4s %4s  %2s %2s %2s %2s %2s %2s\n", "r", "b", "free", "mapped", "anon", "slab", "in", "cs", "flt", "us", "ni", "sy", "id", "wa", "ir");
 }

 /* Jiffies to percent conversion */
 #define JP(jif) ((jif) * 100 / (HZ))
 #define NORM(var) ((var) = (((var) > 99) ? (99) : (var)))

 static void print_line(struct state *old, struct state *new) {
     int us, ni, sy, id, wa, ir;
     us = JP(new->cpu_us - old->cpu_us); NORM(us);
     ni = JP(new->cpu_ni - old->cpu_ni); NORM(ni);
     sy = JP(new->cpu_sy - old->cpu_sy); NORM(sy);
     id = JP(new->cpu_id - old->cpu_id); NORM(id);
     wa = JP(new->cpu_wa - old->cpu_wa); NORM(wa);
     ir = JP(new->cpu_ir - old->cpu_ir); NORM(ir);
     printf("%2ld %2ld  %6ld %6ld %6ld %6ld  %4ld %4ld %4ld  %2d %2d %2d %2d %2d %2d\n",
         new->procs_r ? (new->procs_r - 1) : 0, new->procs_b,
         new->mem_free, new->mem_mapped, new->mem_anon, new->mem_slab,
         new->sys_in - old->sys_in, new->sys_cs - old->sys_cs, new->sys_flt - old->sys_flt,
         us, ni, sy, id, wa, ir);
 }

 static void usage(char *cmd) {
     fprintf(stderr, "Usage: %s [ -h ] [ -n iterations ] [ -d delay ] [ -r header_repeat ]\n"
                     "    -n iterations     How many rows of data to print.\n"
                     "    -d delay          How long to sleep between rows.\n"
                     "    -r header_repeat  How many rows to print before repeating\n"
                     "                      the header.  Zero means never repeat.\n"
                     "    -h                Displays this help screen.\n",
         cmd);
 }
	/*
	* Copyright (c) 2008, The Android Open Source Project
	* 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.
	* * Neither the name of Google, Inc. nor the names of its contributors
	* may be used to endorse or promote products derived from this
	* software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "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
	* COPYRIGHT OWNER OR CONTRIBUTORS 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.
	*/

	#include <errno.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <sys/param.h>
	#include <unistd.h>

	struct state {
	long procs_r;
	long procs_b;

	long mem_free;
	long mem_mapped;
	long mem_anon;
	long mem_slab;

	long sys_in;
	long sys_cs;
	long sys_flt;

	long cpu_us;
	long cpu_ni;
	long cpu_sy;
	long cpu_id;
	long cpu_wa;
	long cpu_ir;
	long cpu_si;
	};

	#define MAX_LINE 256

	char line[MAX_LINE];

	static void read_state(struct state *s);
	static int read_meminfo(struct state *s);
	static int read_stat(struct state *s);
	static int read_vmstat(struct state *s);
	static void print_header(void);
	static void print_line(struct state old, struct state new);
	static void usage(char *cmd);

	int vmstat_main(int argc, char *argv[]) {
	struct state s[2];
	int iterations, delay, header_interval;
	int toggle, count;
	int i;

	iterations = 0;
	delay = 1;
	header_interval = 20;

	for (i = 1; i < argc; i++) {
	if (!strcmp(argv[i], "-n")) {
	if (i >= argc - 1) {
	fprintf(stderr, "Option -n requires an argument.\n");
	exit(EXIT_FAILURE);
	}
	iterations = atoi(argv[++i]);
	continue;
	}
	if (!strcmp(argv[i], "-d")) {
	if (i >= argc - 1) {
	fprintf(stderr, "Option -d requires an argument.\n");
	exit(EXIT_FAILURE);
	}
	delay = atoi(argv[++i]);
	continue;
	}
	if (!strcmp(argv[i], "-r")) {
	if (i >= argc - 1) {
	fprintf(stderr, "Option -r requires an argument.\n");
	exit(EXIT_FAILURE);
	}
	header_interval = atoi(argv[++i]);
	continue;
	}
	if (!strcmp(argv[i], "-h")) {
	usage(argv[0]);
	exit(EXIT_SUCCESS);
	}
	fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]);
	usage(argv[0]);
	exit(EXIT_FAILURE);
	}

	toggle = 0;
	count = 0;

	if (!header_interval)
	print_header();
	read_state(&s[1 - toggle]);
	while ((iterations == 0) \|\| (iterations-- > 0)) {
	sleep(delay);
	read_state(&s[toggle]);
	if (header_interval) {
	if (count == 0)
	print_header();
	count = (count + 1) % header_interval;
	}
	print_line(&s[1 - toggle], &s[toggle]);
	toggle = 1 - toggle;
	}

	return 0;
	}

	static void read_state(struct state *s) {
	int error;

	error = read_meminfo(s);
	if (error) {
	fprintf(stderr, "vmstat: could not read /proc/meminfo: %s\n", strerror(error));
	exit(EXIT_FAILURE);
	}

	error = read_stat(s);
	if (error) {
	fprintf(stderr, "vmstat: could not read /proc/stat: %s\n", strerror(error));
	exit(EXIT_FAILURE);
	}

	error = read_vmstat(s);
	if (error) {
	fprintf(stderr, "vmstat: could not read /proc/vmstat: %s\n", strerror(error));
	exit(EXIT_FAILURE);
	}
	}

	static int read_meminfo(struct state *s) {
	FILE *f;

	f = fopen("/proc/meminfo", "r");
	if (!f) return errno;

	while (fgets(line, MAX_LINE, f)) {
	sscanf(line, "MemFree: %ld kB", &s->mem_free);
	sscanf(line, "AnonPages: %ld kB", &s->mem_anon);
	sscanf(line, "Mapped: %ld kB", &s->mem_mapped);
	sscanf(line, "Slab: %ld kB", &s->mem_slab);
	}

	fclose(f);

	return 0;
	}

	static int read_stat(struct state *s) {
	FILE *f;

	f = fopen("/proc/stat", "r");
	if (!f) return errno;

	while (fgets(line, MAX_LINE, f)) {
	if (!strncmp(line, "cpu ", 4)) {
	sscanf(line, "cpu %ld %ld %ld %ld %ld %ld %ld",
	&s->cpu_us, &s->cpu_ni, &s->cpu_sy, &s->cpu_id, &s->cpu_wa,
	&s->cpu_ir, &s->cpu_si);
	}
	sscanf(line, "intr %ld", &s->sys_in);
	sscanf(line, "ctxt %ld", &s->sys_cs);
	sscanf(line, "procs_running %ld", &s->procs_r);
	sscanf(line, "procs_blocked %ld", &s->procs_b);
	}

	fclose(f);

	return 0;
	}

	static int read_vmstat(struct state *s) {
	FILE *f;

	f = fopen("/proc/vmstat", "r");
	if (!f) return errno;

	while (fgets(line, MAX_LINE, f)) {
	sscanf(line, "pgmajfault %ld", &s->sys_flt);
	}

	fclose(f);

	return 0;
	}

	static void print_header(void) {
	printf("%-5s %-27s %-14s %-17s\n", "procs", "memory", "system", "cpu");
	printf("%2s %2s %6s %6s %6s %6s %4s %4s %4s %2s %2s %2s %2s %2s %2s\n", "r", "b", "free", "mapped", "anon", "slab", "in", "cs", "flt", "us", "ni", "sy", "id", "wa", "ir");
	}

	/* Jiffies to percent conversion */
	#define JP(jif) ((jif) * 100 / (HZ))
	#define NORM(var) ((var) = (((var) > 99) ? (99) : (var)))

	static void print_line(struct state old, struct state new) {
	int us, ni, sy, id, wa, ir;
	us = JP(new->cpu_us - old->cpu_us); NORM(us);
	ni = JP(new->cpu_ni - old->cpu_ni); NORM(ni);
	sy = JP(new->cpu_sy - old->cpu_sy); NORM(sy);
	id = JP(new->cpu_id - old->cpu_id); NORM(id);
	wa = JP(new->cpu_wa - old->cpu_wa); NORM(wa);
	ir = JP(new->cpu_ir - old->cpu_ir); NORM(ir);
	printf("%2ld %2ld %6ld %6ld %6ld %6ld %4ld %4ld %4ld %2d %2d %2d %2d %2d %2d\n",
	new->procs_r ? (new->procs_r - 1) : 0, new->procs_b,
	new->mem_free, new->mem_mapped, new->mem_anon, new->mem_slab,
	new->sys_in - old->sys_in, new->sys_cs - old->sys_cs, new->sys_flt - old->sys_flt,
	us, ni, sy, id, wa, ir);
	}

	static void usage(char *cmd) {
	fprintf(stderr, "Usage: %s [ -h ] [ -n iterations ] [ -d delay ] [ -r header_repeat ]\n"
	" -n iterations How many rows of data to print.\n"
	" -d delay How long to sleep between rows.\n"
	" -r header_repeat How many rows to print before repeating\n"
	" the header. Zero means never repeat.\n"
	" -h Displays this help screen.\n",
	cmd);
	}