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/*
* Copyright (C) 2016 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 "bootio_collector.h"
#include <android-base/logging.h>
#include <android-base/file.h>
#include <log/log.h>
#include "protos.pb.h"
#include "time.h"
#include <unordered_map>
#include <inttypes.h>
#include <dirent.h>
namespace android {
#define CPU_STAT_FILE "/proc/stat"
#define SAMPLES_FILE "/samples"
#define PID_STAT_FILE "/proc/%d/stat"
#define PID_CMDLINE_FILE "/proc/%d/cmdline"
#define PID_IO_FILE "/proc/%d/io"
#define PROC_DIR "/proc"
static const int MAX_LINE = 256;
#define die(...) { LOG(ERROR) << (__VA_ARGS__); exit(EXIT_FAILURE); }
void PopulateCpu(CpuData& cpu) {
long unsigned utime, ntime, stime, itime;
long unsigned iowtime, irqtime, sirqtime;
FILE *file;
file = fopen(CPU_STAT_FILE, "r");
if (!file) die("Could not open /proc/stat.\n");
fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu", &utime, &ntime, &stime,
&itime, &iowtime, &irqtime, &sirqtime);
fclose(file);
cpu.set_utime(utime);
cpu.set_ntime(ntime);
cpu.set_stime(stime);
cpu.set_itime(itime);
cpu.set_iowtime(iowtime);
cpu.set_irqtime(irqtime);
cpu.set_sirqtime(sirqtime);
}
void ClearPreviousResults(std::string path) {
std::string err;
if (!android::base::RemoveFileIfExists(path, &err)) {
LOG(ERROR) << "failed to remove the file " << path << " " << err;
return;
}
}
int ReadIo(char *filename, AppSample *sample) {
FILE *file;
char line[MAX_LINE];
unsigned int rchar, wchar, syscr, syscw, readbytes, writebytes;
file = fopen(filename, "r");
if (!file) return 1;
while (fgets(line, MAX_LINE, file)) {
sscanf(line, "rchar: %u", &rchar);
sscanf(line, "wchar: %u", &wchar);
sscanf(line, "syscr: %u", &syscr);
sscanf(line, "syscw: %u", &syscw);
sscanf(line, "read_bytes: %u", &readbytes);
sscanf(line, "write_bytes: %u", &writebytes);
}
fclose(file);
sample->set_rchar(rchar);
sample->set_wchar(wchar);
sample->set_syscr(syscr);
sample->set_syscw(syscw);
sample->set_readbytes(readbytes);
sample->set_writebytes(writebytes);
return 0;
}
int ReadStatForName(char *filename, AppData *app) {
FILE *file;
char buf[MAX_LINE], *open_paren, *close_paren;
file = fopen(filename, "r");
if (!file) return 1;
fgets(buf, MAX_LINE, file);
fclose(file);
/* Split at first '(' and last ')' to get process name. */
open_paren = strchr(buf, '(');
close_paren = strrchr(buf, ')');
if (!open_paren || !close_paren) return 1;
*open_paren = *close_paren = '\0';
if (!app->has_tname()) {
app->set_tname(open_paren + 1, close_paren - open_paren - 1);
}
return 0;
}
int ReadStat(char *filename, AppSample *sample) {
FILE *file;
char buf[MAX_LINE], *open_paren, *close_paren;
file = fopen(filename, "r");
if (!file) return 1;
fgets(buf, MAX_LINE, file);
fclose(file);
/* Split at first '(' and last ')' to get process name. */
open_paren = strchr(buf, '(');
close_paren = strrchr(buf, ')');
if (!open_paren || !close_paren) return 1;
uint64_t utime;
uint64_t stime;
uint64_t rss;
/* Scan rest of string. */
sscanf(close_paren + 1,
" %*c " "%*d %*d %*d %*d %*d %*d %*d %*d %*d %*d "
"%" PRIu64 /*SCNu64*/
"%" PRIu64 /*SCNu64*/ "%*d %*d %*d %*d %*d %*d %*d %*d "
"%" PRIu64 /*SCNu64*/ "%*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d",
&utime,
&stime,
&rss);
sample->set_utime(utime);
sample->set_stime(stime);
sample->set_rss(rss);
return 0;
}
int ReadCmdline(char *filename, AppData *app) {
FILE *file;
char line[MAX_LINE];
line[0] = '\0';
file = fopen(filename, "r");
if (!file) return 1;
fgets(line, MAX_LINE, file);
fclose(file);
if (strlen(line) > 0) {
app->set_name(line, strlen(line));
} else {
app->set_name("N/A");
}
return 0;
};
void ReadProcData(std::unordered_map<int, AppData*>& pidDataMap, DataContainer& dataContainer,
time_t currentTimeUtc, time_t currentUptime) {
DIR *procDir;
struct dirent *pidDir;
pid_t pid;
char filename[64];
procDir = opendir(PROC_DIR);
if (!procDir) die("Could not open /proc.\n");
while ((pidDir = readdir(procDir))) {
if (!isdigit(pidDir->d_name[0])) {
continue;
}
pid = atoi(pidDir->d_name);
AppData *data;
// TODO: in theory same pid can be shared for multiple processes,
// might need add extra check.
if (pidDataMap.count(pid) == 0) {
data = dataContainer.add_app();
data->set_pid(pid);
sprintf(filename, PID_STAT_FILE, pid);
ReadStatForName(filename, data);
sprintf(filename, PID_CMDLINE_FILE, pid);
ReadCmdline(filename, data);
pidDataMap[pid] = data;
} else {
data = pidDataMap[pid];
}
AppSample *sample = data->add_samples();
sample->set_timestamp(currentTimeUtc);
sample->set_uptime(currentUptime);
sprintf(filename, PID_STAT_FILE, pid);
ReadStat(filename, sample);
sprintf(filename, PID_IO_FILE, pid);
ReadIo(filename, sample);
}
}
uint64_t SumCpuValues(CpuData& cpu) {
return cpu.utime() + cpu.ntime() + cpu.stime() + cpu.itime() + cpu.iowtime() +
cpu.irqtime() + cpu.sirqtime();
}
time_t GetUptime() {
std::string uptime_str;
if (!android::base::ReadFileToString("/proc/uptime", &uptime_str)) {
LOG(ERROR) << "Failed to read /proc/uptime";
return -1;
}
// Cast intentionally rounds down.
return static_cast<time_t>(strtod(uptime_str.c_str(), NULL));
}
struct Stats {
int uptime;
float cpu;
uint64_t rbytes;
uint64_t wbytes;
};
void PrintPids(DataContainer& data, std::unordered_map<int, uint64_t>& cpuDataMap) {
printf("rchar: number of bytes the process read, using any read-like system call "
"(from files, pipes, tty...).\n");
printf("wchar: number of bytes the process wrote using any write-like system call.\n");
printf("wchar: number of bytes the process wrote using any write-like system call.\n");
printf("syscr: number of write-like system call invocations that the process performed.\n");
printf("rbytes: number of bytes the process directly read from disk.\n");
printf("wbytes: number of bytes the process originally dirtied in the page-cache "
"(assuming they will go to disk later).\n\n");
std::unique_ptr<AppSample> bootZeroSample(new AppSample());
std::map<int, Stats> statsMap;
// Init stats map
Stats emptyStat {0, 0., 0, 0};
for (auto it = cpuDataMap.begin(); it != cpuDataMap.end(); it++) {
statsMap[it->first] = emptyStat;
}
for (int i = 0; i < data.app_size(); i++) {
const AppData appData = data.app(i);
printf("\n-----------------------------------------------------------------------------\n");
printf("PID:\t%u\n", appData.pid());
printf("Name:\t%s\n", appData.name().c_str());
printf("ThName:\t%s\n", appData.tname().c_str());
printf("%-15s%-13s%-13s%-13s%-13s%-13s%-13s%-13s\n", "Uptime inter.", "rchar", "wchar",
"syscr", "syscw", "rbytes", "wbytes", "cpu%");
const AppSample *olderSample = NULL;
const AppSample *newerSample = NULL;
bool isFirstSample = true;
for (int j = 0; j < appData.samples_size(); j++) {
olderSample = newerSample;
newerSample = &(appData.samples(j));
if (olderSample == NULL) {
olderSample = bootZeroSample.get();
}
float cpuLoad = 0.;
uint64_t cpuDelta;
if (isFirstSample) {
cpuDelta = cpuDataMap[newerSample->timestamp()];
} else {
cpuDelta = cpuDataMap[newerSample->timestamp()] -
cpuDataMap[olderSample->timestamp()];
}
if (cpuDelta != 0) {
cpuLoad = (newerSample->utime() - olderSample->utime() +
newerSample->stime() - olderSample->stime()) * 100. / cpuDelta;
}
Stats& stats = statsMap[newerSample->timestamp()];
stats.uptime = newerSample->uptime();
stats.cpu += cpuLoad;
stats.rbytes += (newerSample->readbytes() - olderSample->readbytes());
stats.wbytes += (newerSample->writebytes() - olderSample->writebytes());
#define NUMBER "%-13" PRId64
printf("%5" PRId64 " - %-5" PRId64 " " NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER "%-9.2f\n",
#undef NUMBER
olderSample->uptime(),
newerSample->uptime(),
newerSample->rchar() - olderSample->rchar(),
newerSample->wchar() - olderSample->wchar(),
newerSample->syscr() - olderSample->syscr(),
newerSample->syscw() - olderSample->syscw(),
newerSample->readbytes() - olderSample->readbytes(),
newerSample->writebytes() - olderSample->writebytes(),
cpuLoad);
isFirstSample = false;
}
printf("-----------------------------------------------------------------------------\n");
#define NUMBER "%-13" PRId64
printf("%-15s" NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER "\n",
#undef NUMBER
"Total",
newerSample->rchar(),
newerSample->wchar(),
newerSample->syscr(),
newerSample->syscw(),
newerSample->readbytes(),
newerSample->writebytes());
}
printf("\nAggregations\n%-10s%-13s%-13s%-13s\n",
"Total",
"rbytes",
"wbytes",
"cpu%");
for (auto it = statsMap.begin(); it != statsMap.end(); it++) {
printf("%-10u%-13" PRIu64 "%-13" PRIu64 "%-9.2f\n",
it->second.uptime,
it->second.rbytes,
it->second.wbytes,
it->second.cpu);
}
}
}
BootioCollector::BootioCollector(std::string path) {
DCHECK_EQ('/', path.back());
path_ = path;
}
void BootioCollector::StartDataCollection(int timeout, int samples) {
android::ClearPreviousResults(getStoragePath());
int remaining = samples + 1;
int delayS = timeout / samples;
std::unordered_map < int, AppData * > pidDataMap;
std::unique_ptr <DataContainer> data(new DataContainer());
while (remaining > 0) {
time_t currentTimeUtc = time(nullptr);
time_t currentUptime = android::GetUptime();
CpuData *cpu = data->add_cpu();
cpu->set_timestamp(currentTimeUtc);
cpu->set_uptime(currentUptime);
android::PopulateCpu(*cpu);
android::ReadProcData(pidDataMap, *data.get(), currentTimeUtc, currentUptime);
remaining--;
if (remaining == 0) {
continue;
}
sleep(delayS);
}
std::string file_data;
if (!data->SerializeToString(&file_data)) {
LOG(ERROR) << "Failed to serialize";
return;
}
if (!android::base::WriteStringToFile(file_data, getStoragePath())) {
LOG(ERROR) << "Failed to write samples";
}
}
void BootioCollector::Print() {
std::string file_data;
if (!android::base::ReadFileToString(getStoragePath(), &file_data)) {
printf("Failed to read data from file.\n");
return;
}
std::unique_ptr <DataContainer> data(new DataContainer());
if (!data->ParsePartialFromString(file_data)) {
printf("Failed to parse data.\n");
return;
}
std::unordered_map<int, uint64_t> cpuDataMap;
for (int i = 0; i < data->cpu_size(); i++) {
CpuData cpu_data = data->cpu(i);
cpuDataMap[cpu_data.timestamp()] = android::SumCpuValues(cpu_data);
}
android::PrintPids(*data.get(), cpuDataMap);
}
std::string BootioCollector::getStoragePath() {
return path_ + SAMPLES_FILE;
}