X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=608d772501fc54c70967d16e55ed80ba9cccb573;hp=c692e996f2ce2fa292e287119c4a9699086aacc4;hb=55bd27b8f08a151128d7065fa2819aa3e9605299;hpb=cf486cf229b9877afd8120830bece47d93c7e8d0 diff --git a/src/misc.cpp b/src/misc.cpp index c692e996..608d7725 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -1,7 +1,7 @@ /* Stockfish, a UCI chess playing engine derived from Glaurung 2.1 Copyright (C) 2004-2008 Tord Romstad (Glaurung author) - Copyright (C) 2008-2009 Marco Costalba + Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,262 +17,231 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - -#if !defined(_MSC_VER) - -# include -# include -# include - -#else - -#define _CRT_SECURE_NO_DEPRECATE -#include -#include - -#endif - -#include -#include #include #include #include -#include "bitcount.h" #include "misc.h" +#include "thread.h" + +#if defined(__hpux) +# include +#endif using namespace std; -/// Version number. If this is left empty, the current date (in the format -/// YYMMDD) is used as a version number. +/// Version number. If Version is left empty, then Tag plus current +/// date (in the format YYMMDD) is used as a version number. + +static const string Version = ""; +static const string Tag = ""; -static const string EngineVersion = ""; -static const string AppName = "Stockfish"; -static const string AppTag = ""; +/// engine_info() returns the full name of the current Stockfish version. +/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when +/// the program was compiled) or "Stockfish ", depending +/// on whether Version is empty. -//// -//// Variables -//// +const string engine_info(bool to_uci) { -bool Chess960; + const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); + const string cpu64(Is64Bit ? " 64bit" : ""); + const string popcnt(HasPopCnt ? " SSE4.2" : ""); -uint64_t dbg_cnt0 = 0; -uint64_t dbg_cnt1 = 0; + string month, day, year; + stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" -bool dbg_show_mean = false; -bool dbg_show_hit_rate = false; + s << "Stockfish " << Version; + if (Version.empty()) + { + date >> month >> day >> year; -//// -//// Functions -//// + s << Tag << setfill('0') << " " << year.substr(2) + << setw(2) << (1 + months.find(month) / 4) << setw(2) << day; + } -void dbg_hit_on(bool b) { + s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ") + << "Tord Romstad, Marco Costalba and Joona Kiiski"; - assert(!dbg_show_mean); - dbg_show_hit_rate = true; - dbg_cnt0++; - if (b) - dbg_cnt1++; + return s.str(); } -void dbg_hit_on_c(bool c, bool b) { - if (c) - dbg_hit_on(b); +/// Convert system time to milliseconds. That's all we need. + +Time::point Time::now() { + sys_time_t t; system_time(&t); return time_to_msec(t); } -void dbg_before() { - assert(!dbg_show_mean); - dbg_show_hit_rate = true; - dbg_cnt0++; -} +/// Debug functions used mainly to collect run-time statistics -void dbg_after() { +static uint64_t hits[2], means[2]; - assert(!dbg_show_mean); - dbg_show_hit_rate = true; - dbg_cnt1++; -} +void dbg_hit_on(bool b) { hits[0]++; if (b) hits[1]++; } +void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); } +void dbg_mean_of(int v) { means[0]++; means[1] += v; } -void dbg_mean_of(int v) { +void dbg_print() { - assert(!dbg_show_hit_rate); - dbg_show_mean = true; - dbg_cnt0++; - dbg_cnt1 += v; + if (hits[0]) + cerr << "Total " << hits[0] << " Hits " << hits[1] + << " hit rate (%) " << 100 * hits[1] / hits[0] << endl; + + if (means[0]) + cerr << "Total " << means[0] << " Mean " + << (float)means[1] / means[0] << endl; } -void dbg_print_hit_rate() { - cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1 - << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl; -} +/// Our fancy logging facility. The trick here is to replace cin.rdbuf() and +/// cout.rdbuf() with two Tie objects that tie cin and cout to a file stream. We +/// can toggle the logging of std::cout and std:cin at runtime while preserving +/// usual i/o functionality and without changing a single line of code! +/// Idea from http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81 -void dbg_print_mean() { +struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout - cout << "Total " << dbg_cnt0 << " Mean " - << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl; -} + Tie(streambuf* b, ofstream* f) : buf(b), file(f) {} -void dbg_print_hit_rate(ofstream& logFile) { + int sync() { return file->rdbuf()->pubsync(), buf->pubsync(); } + int overflow(int c) { return log(buf->sputc((char)c), "<< "); } + int underflow() { return buf->sgetc(); } + int uflow() { return log(buf->sbumpc(), ">> "); } - logFile << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1 - << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl; -} + streambuf* buf; + ofstream* file; -void dbg_print_mean(ofstream& logFile) { + int log(int c, const char* prefix) { - logFile << "Total " << dbg_cnt0 << " Mean " - << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl; -} + static int last = '\n'; -/// engine_name() returns the full name of the current Stockfish version. -/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when the -/// program was compiled) or "Stockfish ", depending on whether -/// the constant EngineVersion (defined in misc.h) is empty. + if (last == '\n') + file->rdbuf()->sputn(prefix, 3); -const string engine_name() { + return last = file->rdbuf()->sputc((char)c); + } +}; - const string cpu64(CpuHas64BitPath ? " 64bit" : ""); +class Logger { - if (!EngineVersion.empty()) - return AppName+ " " + EngineVersion + cpu64; + Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {} + ~Logger() { start(false); } - string date(__DATE__); // From compiler, format is "Sep 21 2008" - string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); + ofstream file; + Tie in, out; - size_t mon = 1 + months.find(date.substr(0, 3)) / 4; +public: + static void start(bool b) { - stringstream s; - string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2)); + static Logger l; - string name = AppName + " " + AppTag + " "; + if (b && !l.file.is_open()) + { + l.file.open("io_log.txt", ifstream::out | ifstream::app); + cin.rdbuf(&l.in); + cout.rdbuf(&l.out); + } + else if (!b && l.file.is_open()) + { + cout.rdbuf(l.out.buf); + cin.rdbuf(l.in.buf); + l.file.close(); + } + } +}; - s << name << date.substr(date.length() - 2) << setfill('0') - << setw(2) << mon << setw(2) << day << cpu64; - return s.str(); -} +/// Used to serialize access to std::cout to avoid multiple threads to write at +/// the same time. +std::ostream& operator<<(std::ostream& os, SyncCout sc) { -/// get_system_time() returns the current system time, measured in -/// milliseconds. + static Mutex m; -int get_system_time() { + if (sc == io_lock) + m.lock(); -#if defined(_MSC_VER) - struct _timeb t; - _ftime(&t); - return int(t.time*1000 + t.millitm); -#else - struct timeval t; - gettimeofday(&t, NULL); - return t.tv_sec*1000 + t.tv_usec/1000; -#endif + if (sc == io_unlock) + m.unlock(); + + return os; } -/// cpu_count() tries to detect the number of CPU cores. +/// Trampoline helper to avoid moving Logger to misc.h +void start_logger(bool b) { Logger::start(b); } -#if !defined(_MSC_VER) -# if defined(_SC_NPROCESSORS_ONLN) +/// cpu_count() tries to detect the number of CPU cores + int cpu_count() { - return Min(sysconf(_SC_NPROCESSORS_ONLN), 8); -} + +#if defined(_WIN32) || defined(_WIN64) + SYSTEM_INFO s; + GetSystemInfo(&s); + return s.dwNumberOfProcessors; +#else + +# if defined(_SC_NPROCESSORS_ONLN) + return sysconf(_SC_NPROCESSORS_ONLN); +# elif defined(__hpux) + struct pst_dynamic psd; + if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) + return 1; + return psd.psd_proc_cnt; # else -int cpu_count() { return 1; -} # endif +#endif +} + + +/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap +/// conversion from milliseconds to struct timespec, as used by pthreads. + +void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) { + +#if defined(_WIN32) || defined(_WIN64) + int tm = msec; #else + timespec ts, *tm = &ts; + uint64_t ms = Time::now() + msec; -int cpu_count() { - SYSTEM_INFO s; - GetSystemInfo(&s); - return Min(s.dwNumberOfProcessors, 8); + ts.tv_sec = ms / 1000; + ts.tv_nsec = (ms % 1000) * 1000000LL; +#endif + + cond_timedwait(sleepCond, sleepLock, tm); } -#endif +/// prefetch() preloads the given address in L1/L2 cache. This is a non +/// blocking function and do not stalls the CPU waiting for data to be +/// loaded from memory, that can be quite slow. +#if defined(NO_PREFETCH) -/* - From Beowulf, from Olithink -*/ -#ifndef _WIN32 -/* Non-windows version */ -int Bioskey() -{ - fd_set readfds; - struct timeval timeout; - - FD_ZERO(&readfds); - FD_SET(fileno(stdin), &readfds); - /* Set to timeout immediately */ - timeout.tv_sec = 0; - timeout.tv_usec = 0; - select(16, &readfds, 0, 0, &timeout); - - return (FD_ISSET(fileno(stdin), &readfds)); -} +void prefetch(char*) {} #else -/* Windows-version */ -#include -#include -int Bioskey() -{ - static int init = 0, - pipe; - static HANDLE inh; - DWORD dw; - /* If we're running under XBoard then we can't use _kbhit() as the input - * commands are sent to us directly over the internal pipe */ - -#if defined(FILE_CNT) - if (stdin->_cnt > 0) - return stdin->_cnt; -#endif - if (!init) { - init = 1; - inh = GetStdHandle(STD_INPUT_HANDLE); - pipe = !GetConsoleMode(inh, &dw); - if (!pipe) { - SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT)); - FlushConsoleInputBuffer(inh); - } - } - if (pipe) { - if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL)) - return 1; - return dw; - } else { - // Count the number of unread input records, including keyboard, - // mouse, and window-resizing input records. - GetNumberOfConsoleInputEvents(inh, &dw); - if (dw <= 0) - return 0; - - // Read data from console without removing it from the buffer - INPUT_RECORD rec[256]; - DWORD recCnt; - if (!PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt)) - return 0; - - // Search for at least one keyboard event - for (DWORD i = 0; i < recCnt; i++) - if (rec[i].EventType == KEY_EVENT) - return 1; - - return 0; - } + +void prefetch(char* addr) { + +# if defined(__INTEL_COMPILER) + // This hack prevents prefetches to be optimized away by + // Intel compiler. Both MSVC and gcc seems not affected. + __asm__ (""); +# endif + +# if defined(__INTEL_COMPILER) || defined(_MSC_VER) + _mm_prefetch(addr, _MM_HINT_T0); + _mm_prefetch(addr+64, _MM_HINT_T0); // 64 bytes ahead +# else + __builtin_prefetch(addr); + __builtin_prefetch(addr+64); +# endif } + #endif