init/bootchart.cpp - android_system_core - Gitiles

 /*
  * Copyright (C) 2008 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "bootchart.h"
 #include "log.h"
 #include "property_service.h"

 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/utsname.h>
 #include <time.h>
 #include <unistd.h>

 #include <memory>
 #include <string>
 #include <vector>

 #include <android-base/file.h>

 #define LOG_ROOT        "/data/bootchart"
 #define LOG_STAT        LOG_ROOT"/proc_stat.log"
 #define LOG_PROCS       LOG_ROOT"/proc_ps.log"
 #define LOG_DISK        LOG_ROOT"/proc_diskstats.log"
 #define LOG_HEADER      LOG_ROOT"/header"
 #define LOG_ACCT        LOG_ROOT"/kernel_pacct"

 #define LOG_STARTFILE   LOG_ROOT"/start"
 #define LOG_STOPFILE    LOG_ROOT"/stop"

 // Polling period in ms.
 static const int BOOTCHART_POLLING_MS = 200;

 // Max polling time in seconds.
 static const int BOOTCHART_MAX_TIME_SEC = 10*60;

 static long long g_last_bootchart_time;
 static int g_remaining_samples;

 static FILE* log_stat;
 static FILE* log_procs;
 static FILE* log_disks;

 static long long get_uptime_jiffies() {
     std::string uptime;
     if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
         return 0;
     }
     return 100LL * strtod(uptime.c_str(), NULL);
 }

 static void log_header() {
     char date[32];
     time_t now_t = time(NULL);
     struct tm now = *localtime(&now_t);
     strftime(date, sizeof(date), "%F %T", &now);

     utsname uts;
     if (uname(&uts) == -1) {
         return;
     }

     std::string fingerprint = property_get("ro.build.fingerprint");
     if (fingerprint.empty()) {
         return;
     }

     std::string kernel_cmdline;
     android::base::ReadFileToString("/proc/cmdline", &kernel_cmdline);

     FILE* out = fopen(LOG_HEADER, "we");
     if (out == NULL) {
         return;
     }
     fprintf(out, "version = Android init 0.8\n");
     fprintf(out, "title = Boot chart for Android (%s)\n", date);
     fprintf(out, "system.uname = %s %s %s %s\n", uts.sysname, uts.release, uts.version, uts.machine);
     fprintf(out, "system.release = %s\n", fingerprint.c_str());
     // TODO: use /proc/cpuinfo "model name" line for x86, "Processor" line for arm.
     fprintf(out, "system.cpu = %s\n", uts.machine);
     fprintf(out, "system.kernel.options = %s\n", kernel_cmdline.c_str());
     fclose(out);
 }

 static void do_log_uptime(FILE* log) {
     fprintf(log, "%lld\n", get_uptime_jiffies());
 }

 static void do_log_file(FILE* log, const char* procfile) {
     do_log_uptime(log);

     std::string content;
     if (android::base::ReadFileToString(procfile, &content)) {
         fprintf(log, "%s\n", content.c_str());
     }
 }

 static void do_log_procs(FILE* log) {
     do_log_uptime(log);

     std::unique_ptr<DIR, int(*)(DIR*)> dir(opendir("/proc"), closedir);
     struct dirent* entry;
     while ((entry = readdir(dir.get())) != NULL) {
         // Only match numeric values.
         char* end;
         int pid = strtol(entry->d_name, &end, 10);
         if (end != NULL && end > entry->d_name && *end == 0) {
             char filename[32];

             // /proc/<pid>/stat only has truncated task names, so get the full
             // name from /proc/<pid>/cmdline.
             snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
             std::string cmdline;
             android::base::ReadFileToString(filename, &cmdline);
             const char* full_name = cmdline.c_str(); // So we stop at the first NUL.

             // Read process stat line.
             snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
             std::string stat;
             if (android::base::ReadFileToString(filename, &stat)) {
                 if (!cmdline.empty()) {
                     // Substitute the process name with its real name.
                     size_t open = stat.find('(');
                     size_t close = stat.find_last_of(')');
                     if (open != std::string::npos && close != std::string::npos) {
                         stat.replace(open + 1, close - open - 1, full_name);
                     }
                 }
                 fputs(stat.c_str(), log);
             }
         }
     }

     fputc('\n', log);
 }

 static int bootchart_init() {
     int timeout = 0;

     std::string start;
     android::base::ReadFileToString(LOG_STARTFILE, &start);
     if (!start.empty()) {
         timeout = atoi(start.c_str());
     } else {
         // When running with emulator, androidboot.bootchart=<timeout>
         // might be passed by as kernel parameters to specify the bootchart
         // timeout. this is useful when using -wipe-data since the /data
         // partition is fresh.
         std::string cmdline;
         const char* s;
         android::base::ReadFileToString("/proc/cmdline", &cmdline);
 #define KERNEL_OPTION  "androidboot.bootchart="
         if ((s = strstr(cmdline.c_str(), KERNEL_OPTION)) != NULL) {
             timeout = atoi(s + sizeof(KERNEL_OPTION) - 1);
         }
     }
     if (timeout == 0)
         return 0;

     if (timeout > BOOTCHART_MAX_TIME_SEC)
         timeout = BOOTCHART_MAX_TIME_SEC;

     int count = (timeout*1000 + BOOTCHART_POLLING_MS-1)/BOOTCHART_POLLING_MS;

     log_stat = fopen(LOG_STAT, "we");
     if (log_stat == NULL) {
         return -1;
     }
     log_procs = fopen(LOG_PROCS, "we");
     if (log_procs == NULL) {
         fclose(log_stat);
         return -1;
     }
     log_disks = fopen(LOG_DISK, "we");
     if (log_disks == NULL) {
         fclose(log_stat);
         fclose(log_procs);
         return -1;
     }

     // Create kernel process accounting file.
     close(open(LOG_ACCT, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644));
     acct(LOG_ACCT);

     log_header();
     return count;
 }

 int do_bootchart_init(const std::vector<std::string>& args) {
     g_remaining_samples = bootchart_init();
     if (g_remaining_samples < 0) {
         PLOG(ERROR) << "Bootcharting initialization failed";
     } else if (g_remaining_samples > 0) {
         LOG(INFO) << "Bootcharting started (will run for "
                   << ((g_remaining_samples * BOOTCHART_POLLING_MS) / 1000) << " s).";
     } else {
         LOG(VERBOSE) << "Not bootcharting.";
     }
     return 0;
 }

 static int bootchart_step() {
     do_log_file(log_stat,   "/proc/stat");
     do_log_file(log_disks,  "/proc/diskstats");
     do_log_procs(log_procs);

     // Stop if /data/bootchart/stop contains 1.
     std::string stop;
     if (android::base::ReadFileToString(LOG_STOPFILE, &stop) && stop == "1") {
         return -1;
     }

     return 0;
 }

 /* called to get time (in ms) used by bootchart */
 static long long bootchart_gettime() {
     return 10LL*get_uptime_jiffies();
 }

 static void bootchart_finish() {
     unlink(LOG_STOPFILE);
     fclose(log_stat);
     fclose(log_disks);
     fclose(log_procs);
     acct(NULL);
     LOG(INFO) << "Bootcharting finished";
 }

 void bootchart_sample(int* timeout) {
     // Do we have any more bootcharting to do?
     if (g_remaining_samples <= 0) {
         return;
     }

     long long current_time = bootchart_gettime();
     int elapsed_time = current_time - g_last_bootchart_time;

     if (elapsed_time >= BOOTCHART_POLLING_MS) {
         // Count missed samples.
         while (elapsed_time >= BOOTCHART_POLLING_MS) {
             elapsed_time -= BOOTCHART_POLLING_MS;
             g_remaining_samples--;
         }
         // Count may be negative, take a sample anyway.
         g_last_bootchart_time = current_time;
         if (bootchart_step() < 0 || g_remaining_samples <= 0) {
             bootchart_finish();
             g_remaining_samples = 0;
         }
     }
     if (g_remaining_samples > 0) {
         int remaining_time = BOOTCHART_POLLING_MS - elapsed_time;
         if (*timeout < 0 || *timeout > remaining_time) {
             *timeout = remaining_time;
         }
     }
 }
	/*
	* Copyright (C) 2008 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "bootchart.h"
	#include "log.h"
	#include "property_service.h"

	#include <dirent.h>
	#include <errno.h>
	#include <fcntl.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>
	#include <sys/utsname.h>
	#include <time.h>
	#include <unistd.h>

	#include <memory>
	#include <string>
	#include <vector>

	#include <android-base/file.h>

	#define LOG_ROOT "/data/bootchart"
	#define LOG_STAT LOG_ROOT"/proc_stat.log"
	#define LOG_PROCS LOG_ROOT"/proc_ps.log"
	#define LOG_DISK LOG_ROOT"/proc_diskstats.log"
	#define LOG_HEADER LOG_ROOT"/header"
	#define LOG_ACCT LOG_ROOT"/kernel_pacct"

	#define LOG_STARTFILE LOG_ROOT"/start"
	#define LOG_STOPFILE LOG_ROOT"/stop"

	// Polling period in ms.
	static const int BOOTCHART_POLLING_MS = 200;

	// Max polling time in seconds.
	static const int BOOTCHART_MAX_TIME_SEC = 10*60;

	static long long g_last_bootchart_time;
	static int g_remaining_samples;

	static FILE* log_stat;
	static FILE* log_procs;
	static FILE* log_disks;

	static long long get_uptime_jiffies() {
	std::string uptime;
	if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
	return 0;
	}
	return 100LL * strtod(uptime.c_str(), NULL);
	}

	static void log_header() {
	char date[32];
	time_t now_t = time(NULL);
	struct tm now = *localtime(&now_t);
	strftime(date, sizeof(date), "%F %T", &now);

	utsname uts;
	if (uname(&uts) == -1) {
	return;
	}

	std::string fingerprint = property_get("ro.build.fingerprint");
	if (fingerprint.empty()) {
	return;
	}

	std::string kernel_cmdline;
	android::base::ReadFileToString("/proc/cmdline", &kernel_cmdline);

	FILE* out = fopen(LOG_HEADER, "we");
	if (out == NULL) {
	return;
	}
	fprintf(out, "version = Android init 0.8\n");
	fprintf(out, "title = Boot chart for Android (%s)\n", date);
	fprintf(out, "system.uname = %s %s %s %s\n", uts.sysname, uts.release, uts.version, uts.machine);
	fprintf(out, "system.release = %s\n", fingerprint.c_str());
	// TODO: use /proc/cpuinfo "model name" line for x86, "Processor" line for arm.
	fprintf(out, "system.cpu = %s\n", uts.machine);
	fprintf(out, "system.kernel.options = %s\n", kernel_cmdline.c_str());
	fclose(out);
	}

	static void do_log_uptime(FILE* log) {
	fprintf(log, "%lld\n", get_uptime_jiffies());
	}

	static void do_log_file(FILE* log, const char* procfile) {
	do_log_uptime(log);

	std::string content;
	if (android::base::ReadFileToString(procfile, &content)) {
	fprintf(log, "%s\n", content.c_str());
	}
	}

	static void do_log_procs(FILE* log) {
	do_log_uptime(log);

	std::unique_ptr<DIR, int()(DIR)> dir(opendir("/proc"), closedir);
	struct dirent* entry;
	while ((entry = readdir(dir.get())) != NULL) {
	// Only match numeric values.
	char* end;
	int pid = strtol(entry->d_name, &end, 10);
	if (end != NULL && end > entry->d_name && *end == 0) {
	char filename[32];

	// /proc/<pid>/stat only has truncated task names, so get the full
	// name from /proc/<pid>/cmdline.
	snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
	std::string cmdline;
	android::base::ReadFileToString(filename, &cmdline);
	const char* full_name = cmdline.c_str(); // So we stop at the first NUL.

	// Read process stat line.
	snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
	std::string stat;
	if (android::base::ReadFileToString(filename, &stat)) {
	if (!cmdline.empty()) {
	// Substitute the process name with its real name.
	size_t open = stat.find('(');
	size_t close = stat.find_last_of(')');
	if (open != std::string::npos && close != std::string::npos) {
	stat.replace(open + 1, close - open - 1, full_name);
	}
	}
	fputs(stat.c_str(), log);
	}
	}
	}

	fputc('\n', log);
	}

	static int bootchart_init() {
	int timeout = 0;

	std::string start;
	android::base::ReadFileToString(LOG_STARTFILE, &start);
	if (!start.empty()) {
	timeout = atoi(start.c_str());
	} else {
	// When running with emulator, androidboot.bootchart=<timeout>
	// might be passed by as kernel parameters to specify the bootchart
	// timeout. this is useful when using -wipe-data since the /data
	// partition is fresh.
	std::string cmdline;
	const char* s;
	android::base::ReadFileToString("/proc/cmdline", &cmdline);
	#define KERNEL_OPTION "androidboot.bootchart="
	if ((s = strstr(cmdline.c_str(), KERNEL_OPTION)) != NULL) {
	timeout = atoi(s + sizeof(KERNEL_OPTION) - 1);
	}
	}
	if (timeout == 0)
	return 0;

	if (timeout > BOOTCHART_MAX_TIME_SEC)
	timeout = BOOTCHART_MAX_TIME_SEC;

	int count = (timeout*1000 + BOOTCHART_POLLING_MS-1)/BOOTCHART_POLLING_MS;

	log_stat = fopen(LOG_STAT, "we");
	if (log_stat == NULL) {
	return -1;
	}
	log_procs = fopen(LOG_PROCS, "we");
	if (log_procs == NULL) {
	fclose(log_stat);
	return -1;
	}
	log_disks = fopen(LOG_DISK, "we");
	if (log_disks == NULL) {
	fclose(log_stat);
	fclose(log_procs);
	return -1;
	}

	// Create kernel process accounting file.
	close(open(LOG_ACCT, O_WRONLY \| O_CREAT \| O_TRUNC \| O_CLOEXEC, 0644));
	acct(LOG_ACCT);

	log_header();
	return count;
	}

	int do_bootchart_init(const std::vector<std::string>& args) {
	g_remaining_samples = bootchart_init();
	if (g_remaining_samples < 0) {
	PLOG(ERROR) << "Bootcharting initialization failed";
	} else if (g_remaining_samples > 0) {
	LOG(INFO) << "Bootcharting started (will run for "
	<< ((g_remaining_samples * BOOTCHART_POLLING_MS) / 1000) << " s).";
	} else {
	LOG(VERBOSE) << "Not bootcharting.";
	}
	return 0;
	}

	static int bootchart_step() {
	do_log_file(log_stat, "/proc/stat");
	do_log_file(log_disks, "/proc/diskstats");
	do_log_procs(log_procs);

	// Stop if /data/bootchart/stop contains 1.
	std::string stop;
	if (android::base::ReadFileToString(LOG_STOPFILE, &stop) && stop == "1") {
	return -1;
	}

	return 0;
	}

	/* called to get time (in ms) used by bootchart */
	static long long bootchart_gettime() {
	return 10LL*get_uptime_jiffies();
	}

	static void bootchart_finish() {
	unlink(LOG_STOPFILE);
	fclose(log_stat);
	fclose(log_disks);
	fclose(log_procs);
	acct(NULL);
	LOG(INFO) << "Bootcharting finished";
	}

	void bootchart_sample(int* timeout) {
	// Do we have any more bootcharting to do?
	if (g_remaining_samples <= 0) {
	return;
	}

	long long current_time = bootchart_gettime();
	int elapsed_time = current_time - g_last_bootchart_time;

	if (elapsed_time >= BOOTCHART_POLLING_MS) {
	// Count missed samples.
	while (elapsed_time >= BOOTCHART_POLLING_MS) {
	elapsed_time -= BOOTCHART_POLLING_MS;
	g_remaining_samples--;
	}
	// Count may be negative, take a sample anyway.
	g_last_bootchart_time = current_time;
	if (bootchart_step() < 0 \|\| g_remaining_samples <= 0) {
	bootchart_finish();
	g_remaining_samples = 0;
	}
	}
	if (g_remaining_samples > 0) {
	int remaining_time = BOOTCHART_POLLING_MS - elapsed_time;
	if (timeout < 0 \|\| timeout > remaining_time) {
	*timeout = remaining_time;
	}
	}
	}