274 lines
8.1 KiB
C++
274 lines
8.1 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "bootchart.h"
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#include "keywords.h"
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#include "log.h"
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#include "property_service.h"
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <time.h>
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#include <unistd.h>
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#include <memory>
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#include <string>
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#include <base/file.h>
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#define LOG_ROOT "/data/bootchart"
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#define LOG_STAT LOG_ROOT"/proc_stat.log"
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#define LOG_PROCS LOG_ROOT"/proc_ps.log"
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#define LOG_DISK LOG_ROOT"/proc_diskstats.log"
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#define LOG_HEADER LOG_ROOT"/header"
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#define LOG_ACCT LOG_ROOT"/kernel_pacct"
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#define LOG_STARTFILE LOG_ROOT"/start"
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#define LOG_STOPFILE LOG_ROOT"/stop"
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// Polling period in ms.
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static const int BOOTCHART_POLLING_MS = 200;
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// Max polling time in seconds.
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static const int BOOTCHART_MAX_TIME_SEC = 10*60;
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static long long g_last_bootchart_time;
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static int g_remaining_samples;
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static FILE* log_stat;
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static FILE* log_procs;
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static FILE* log_disks;
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static long long get_uptime_jiffies() {
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std::string uptime;
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if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
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return 0;
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}
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return 100LL * strtod(uptime.c_str(), NULL);
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}
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static void log_header() {
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char date[32];
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time_t now_t = time(NULL);
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struct tm now = *localtime(&now_t);
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strftime(date, sizeof(date), "%F %T", &now);
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utsname uts;
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if (uname(&uts) == -1) {
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return;
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}
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std::string fingerprint = property_get("ro.build.fingerprint");
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if (fingerprint.empty()) {
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return;
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}
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std::string kernel_cmdline;
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android::base::ReadFileToString("/proc/cmdline", &kernel_cmdline);
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FILE* out = fopen(LOG_HEADER, "we");
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if (out == NULL) {
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return;
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}
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fprintf(out, "version = Android init 0.8 " __TIME__ "\n");
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fprintf(out, "title = Boot chart for Android (%s)\n", date);
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fprintf(out, "system.uname = %s %s %s %s\n", uts.sysname, uts.release, uts.version, uts.machine);
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fprintf(out, "system.release = %s\n", fingerprint.c_str());
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// TODO: use /proc/cpuinfo "model name" line for x86, "Processor" line for arm.
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fprintf(out, "system.cpu = %s\n", uts.machine);
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fprintf(out, "system.kernel.options = %s\n", kernel_cmdline.c_str());
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fclose(out);
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}
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static void do_log_uptime(FILE* log) {
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fprintf(log, "%lld\n", get_uptime_jiffies());
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}
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static void do_log_file(FILE* log, const char* procfile) {
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do_log_uptime(log);
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std::string content;
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if (android::base::ReadFileToString(procfile, &content)) {
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fprintf(log, "%s\n", content.c_str());
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}
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}
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static void do_log_procs(FILE* log) {
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do_log_uptime(log);
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std::unique_ptr<DIR, int(*)(DIR*)> dir(opendir("/proc"), closedir);
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struct dirent* entry;
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while ((entry = readdir(dir.get())) != NULL) {
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// Only match numeric values.
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char* end;
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int pid = strtol(entry->d_name, &end, 10);
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if (end != NULL && end > entry->d_name && *end == 0) {
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char filename[32];
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// /proc/<pid>/stat only has truncated task names, so get the full
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// name from /proc/<pid>/cmdline.
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snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
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std::string cmdline;
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android::base::ReadFileToString(filename, &cmdline);
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const char* full_name = cmdline.c_str(); // So we stop at the first NUL.
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// Read process stat line.
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snprintf(filename, sizeof(filename), "/proc/%d/stat", pid);
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std::string stat;
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if (android::base::ReadFileToString(filename, &stat)) {
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if (!cmdline.empty()) {
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// Substitute the process name with its real name.
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size_t open = stat.find('(');
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size_t close = stat.find_last_of(')');
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if (open != std::string::npos && close != std::string::npos) {
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stat.replace(open + 1, close - open - 1, full_name);
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}
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}
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fputs(stat.c_str(), log);
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}
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}
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}
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fputc('\n', log);
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}
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static int bootchart_init() {
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int timeout = 0;
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std::string start;
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android::base::ReadFileToString(LOG_STARTFILE, &start);
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if (!start.empty()) {
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timeout = atoi(start.c_str());
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} else {
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// When running with emulator, androidboot.bootchart=<timeout>
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// might be passed by as kernel parameters to specify the bootchart
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// timeout. this is useful when using -wipe-data since the /data
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// partition is fresh.
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std::string cmdline;
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const char* s;
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android::base::ReadFileToString("/proc/cmdline", &cmdline);
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#define KERNEL_OPTION "androidboot.bootchart="
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if ((s = strstr(cmdline.c_str(), KERNEL_OPTION)) != NULL) {
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timeout = atoi(s + sizeof(KERNEL_OPTION) - 1);
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}
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}
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if (timeout == 0)
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return 0;
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if (timeout > BOOTCHART_MAX_TIME_SEC)
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timeout = BOOTCHART_MAX_TIME_SEC;
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int count = (timeout*1000 + BOOTCHART_POLLING_MS-1)/BOOTCHART_POLLING_MS;
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log_stat = fopen(LOG_STAT, "we");
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if (log_stat == NULL) {
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return -1;
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}
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log_procs = fopen(LOG_PROCS, "we");
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if (log_procs == NULL) {
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fclose(log_stat);
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return -1;
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}
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log_disks = fopen(LOG_DISK, "we");
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if (log_disks == NULL) {
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fclose(log_stat);
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fclose(log_procs);
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return -1;
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}
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// Create kernel process accounting file.
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close(open(LOG_ACCT, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644));
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acct(LOG_ACCT);
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log_header();
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return count;
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}
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int do_bootchart_init(const std::vector<std::string>& args) {
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g_remaining_samples = bootchart_init();
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if (g_remaining_samples < 0) {
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ERROR("Bootcharting init failure: %s\n", strerror(errno));
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} else if (g_remaining_samples > 0) {
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NOTICE("Bootcharting started (will run for %d s).\n",
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(g_remaining_samples * BOOTCHART_POLLING_MS) / 1000);
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} else {
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NOTICE("Not bootcharting.\n");
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}
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return 0;
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}
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static int bootchart_step() {
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do_log_file(log_stat, "/proc/stat");
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do_log_file(log_disks, "/proc/diskstats");
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do_log_procs(log_procs);
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// Stop if /data/bootchart/stop contains 1.
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std::string stop;
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if (android::base::ReadFileToString(LOG_STOPFILE, &stop) && stop == "1") {
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return -1;
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}
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return 0;
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}
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/* called to get time (in ms) used by bootchart */
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static long long bootchart_gettime() {
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return 10LL*get_uptime_jiffies();
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}
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static void bootchart_finish() {
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unlink(LOG_STOPFILE);
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fclose(log_stat);
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fclose(log_disks);
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fclose(log_procs);
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acct(NULL);
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}
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void bootchart_sample(int* timeout) {
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// Do we have any more bootcharting to do?
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if (g_remaining_samples <= 0) {
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return;
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}
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long long current_time = bootchart_gettime();
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int elapsed_time = current_time - g_last_bootchart_time;
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if (elapsed_time >= BOOTCHART_POLLING_MS) {
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/* count missed samples */
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while (elapsed_time >= BOOTCHART_POLLING_MS) {
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elapsed_time -= BOOTCHART_POLLING_MS;
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g_remaining_samples--;
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}
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/* count may be negative, take a sample anyway */
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g_last_bootchart_time = current_time;
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if (bootchart_step() < 0 || g_remaining_samples <= 0) {
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bootchart_finish();
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g_remaining_samples = 0;
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}
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}
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if (g_remaining_samples > 0) {
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int remaining_time = BOOTCHART_POLLING_MS - elapsed_time;
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if (*timeout < 0 || *timeout > remaining_time) {
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*timeout = remaining_time;
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}
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}
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}
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