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#include "util/usage.hh"
#include "util/exception.hh"
#include <fstream>
#include <ostream>
#include <sstream>
#include <set>
#include <string>
#include <cstring>
#include <cctype>
#include <ctime>
#if defined(_WIN32) || defined(_WIN64)
// This code lifted from physmem.c in gnulib. See the copyright statement
// below.
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
/* MEMORYSTATUSEX is missing from older windows headers, so define
a local replacement. */
typedef struct
{
DWORD dwLength;
DWORD dwMemoryLoad;
DWORDLONG ullTotalPhys;
DWORDLONG ullAvailPhys;
DWORDLONG ullTotalPageFile;
DWORDLONG ullAvailPageFile;
DWORDLONG ullTotalVirtual;
DWORDLONG ullAvailVirtual;
DWORDLONG ullAvailExtendedVirtual;
} lMEMORYSTATUSEX;
// Is this really supposed to be defined like this?
typedef int WINBOOL;
typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*);
#else
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
#endif
#if defined(__MACH__) || defined(__FreeBSD__) || defined(__APPLE__)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
namespace util {
namespace {
#if defined(__MACH__)
typedef struct timeval Wall;
Wall GetWall() {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv;
}
#elif defined(_WIN32) || defined(_WIN64)
typedef time_t Wall;
Wall GetWall() {
return time(NULL);
}
#else
typedef struct timespec Wall;
Wall GetWall() {
Wall ret;
clock_gettime(CLOCK_MONOTONIC, &ret);
return ret;
}
#endif
// gcc possible-unused function flags
#ifdef __GNUC__
double Subtract(time_t first, time_t second) __attribute__ ((unused));
double DoubleSec(time_t tv) __attribute__ ((unused));
#if !defined(_WIN32) && !defined(_WIN64)
double Subtract(const struct timeval &first, const struct timeval &second) __attribute__ ((unused));
double Subtract(const struct timespec &first, const struct timespec &second) __attribute__ ((unused));
double DoubleSec(const struct timeval &tv) __attribute__ ((unused));
double DoubleSec(const struct timespec &tv) __attribute__ ((unused));
#endif
#endif
// Some of these functions are only used on some platforms.
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#endif
// These all assume first > second
double Subtract(time_t first, time_t second) {
return difftime(first, second);
}
double DoubleSec(time_t tv) {
return static_cast<double>(tv);
}
#if !defined(_WIN32) && !defined(_WIN64)
double Subtract(const struct timeval &first, const struct timeval &second) {
return static_cast<double>(first.tv_sec - second.tv_sec) + static_cast<double>(first.tv_usec - second.tv_usec) / 1000000.0;
}
double Subtract(const struct timespec &first, const struct timespec &second) {
return static_cast<double>(first.tv_sec - second.tv_sec) + static_cast<double>(first.tv_nsec - second.tv_nsec) / 1000000000.0;
}
double DoubleSec(const struct timeval &tv) {
return static_cast<double>(tv.tv_sec) + (static_cast<double>(tv.tv_usec) / 1000000.0);
}
double DoubleSec(const struct timespec &tv) {
return static_cast<double>(tv.tv_sec) + (static_cast<double>(tv.tv_nsec) / 1000000000.0);
}
#endif
#ifdef __clang__
#pragma clang diagnostic pop
#endif
class RecordStart {
public:
RecordStart() {
started_ = GetWall();
}
const Wall &Started() const {
return started_;
}
private:
Wall started_;
};
const RecordStart kRecordStart;
const char *SkipSpaces(const char *at) {
for (; *at == ' ' || *at == '\t'; ++at) {}
return at;
}
} // namespace
double WallTime() {
return Subtract(GetWall(), kRecordStart.Started());
}
double CPUTime() {
#if defined(_WIN32) || defined(_WIN64)
return 0.0;
#else
struct rusage usage;
if (getrusage(RUSAGE_SELF, &usage))
return 0.0;
return DoubleSec(usage.ru_utime) + DoubleSec(usage.ru_stime);
#endif
}
uint64_t RSSMax() {
#if defined(_WIN32) || defined(_WIN64)
return 0;
#else
struct rusage usage;
if (getrusage(RUSAGE_SELF, &usage))
return 0;
return static_cast<uint64_t>(usage.ru_maxrss) * 1024;
#endif
}
void PrintUsage(std::ostream &out) {
#if !defined(_WIN32) && !defined(_WIN64)
// Linux doesn't set memory usage in getrusage :-(
std::set<std::string> headers;
headers.insert("VmPeak:");
headers.insert("VmRSS:");
headers.insert("Name:");
std::ifstream status("/proc/self/status", std::ios::in);
std::string header, value;
while ((status >> header) && getline(status, value)) {
if (headers.find(header) != headers.end()) {
out << header << SkipSpaces(value.c_str()) << '\t';
}
}
struct rusage usage;
if (getrusage(RUSAGE_SELF, &usage)) {
perror("getrusage");
return;
}
out << "RSSMax:" << usage.ru_maxrss << " kB" << '\t';
out << "user:" << DoubleSec(usage.ru_utime) << "\tsys:" << DoubleSec(usage.ru_stime) << '\t';
out << "CPU:" << (DoubleSec(usage.ru_utime) + DoubleSec(usage.ru_stime));
out << '\t';
#endif
out << "real:" << WallTime() << '\n';
}
/* Adapted from physmem.c in gnulib 831b84c59ef413c57a36b67344467d66a8a2ba70 */
/* Calculate the size of physical memory.
Copyright (C) 2000-2001, 2003, 2005-2006, 2009-2013 Free Software
Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
uint64_t GuessPhysicalMemory() {
#if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
{
long pages = sysconf(_SC_PHYS_PAGES);
long page_size = sysconf(_SC_PAGESIZE);
if (pages != -1 && page_size != -1)
return static_cast<uint64_t>(pages) * static_cast<uint64_t>(page_size);
}
#endif
#ifdef HW_PHYSMEM
{ /* This works on *bsd and darwin. */
unsigned int physmem;
size_t len = sizeof physmem;
static int mib[2] = { CTL_HW, HW_PHYSMEM };
if (sysctl (mib, sizeof(mib) / sizeof(mib[0]), &physmem, &len, NULL, 0) == 0
&& len == sizeof (physmem))
return static_cast<uint64_t>(physmem);
}
#endif
#if defined(_WIN32) || defined(_WIN64)
{ /* this works on windows */
PFN_MS_EX pfnex;
HMODULE h = GetModuleHandle (TEXT("kernel32.dll"));
if (!h)
return 0;
/* Use GlobalMemoryStatusEx if available. */
if ((pfnex = (PFN_MS_EX) GetProcAddress (h, "GlobalMemoryStatusEx")))
{
lMEMORYSTATUSEX lms_ex;
lms_ex.dwLength = sizeof lms_ex;
if (!pfnex (&lms_ex))
return 0;
return lms_ex.ullTotalPhys;
}
/* Fall back to GlobalMemoryStatus which is always available.
but returns wrong results for physical memory > 4GB. */
else
{
MEMORYSTATUS ms;
GlobalMemoryStatus (&ms);
return ms.dwTotalPhys;
}
}
#endif
return 0;
}
namespace {
class SizeParseError : public Exception {
public:
explicit SizeParseError(const std::string &str) throw() {
*this << "Failed to parse " << str << " into a memory size ";
}
};
template <class Num> uint64_t ParseNum(const std::string &arg) {
std::stringstream stream(arg);
Num value;
stream >> value;
UTIL_THROW_IF_ARG(!stream, SizeParseError, (arg), "for the leading number.");
std::string after;
stream >> after;
UTIL_THROW_IF_ARG(after.size() > 1, SizeParseError, (arg), "because there are more than two characters after the number.");
std::string throwaway;
UTIL_THROW_IF_ARG(stream >> throwaway, SizeParseError, (arg), "because there was more cruft " << throwaway << " after the number.");
// Silly sort, using kilobytes as your default unit.
if (after.empty()) after = "K";
if (after == "%") {
uint64_t mem = GuessPhysicalMemory();
UTIL_THROW_IF_ARG(!mem, SizeParseError, (arg), "because % was specified but the physical memory size could not be determined.");
return static_cast<uint64_t>(static_cast<double>(value) * static_cast<double>(mem) / 100.0);
}
if (after == "k") after == "K";
std::string units("bKMGTPEZY");
std::string::size_type index = units.find(after[0]);
UTIL_THROW_IF_ARG(index == std::string::npos, SizeParseError, (arg), "the allowed suffixes are " << units << "%.");
for (std::string::size_type i = 0; i < index; ++i) {
value *= 1024;
}
return static_cast<uint64_t>(value);
}
} // namespace
uint64_t ParseSize(const std::string &arg) {
return arg.find('.') == std::string::npos ? ParseNum<double>(arg) : ParseNum<uint64_t>(arg);
}
} // namespace util
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