X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=13923a7b901a75b44ed879a610bf90c1d2e63bdb;hp=4d91c0fbb11ef8e4e2ba20a434b086400761e4e3;hb=13b9e1e09811560d0120a8586c7418fb3640d626;hpb=81cd417b4584b0e3830940c5cb122c898afde08a diff --git a/src/misc.cpp b/src/misc.cpp index 4d91c0fb..13923a7b 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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2008-2014 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 @@ -17,195 +17,170 @@ along with this program. If not, see . */ -#if defined(_MSC_VER) - -#define _CRT_SECURE_NO_DEPRECATE -#define NOMINMAX // disable macros min() and max() -#include -#include - -#else - -# include -# include -# include -# if defined(__hpux) -# include -# endif - -#endif - -#if !defined(NO_PREFETCH) -# include -#endif - -#include -#include #include #include #include -#include -#include "bitcount.h" #include "misc.h" #include "thread.h" using namespace std; -/// Version number. If EngineVersion is left empty, then AppTag plus -/// current date (in the format YYMMDD) is used as a version number. - -static const string AppName = "Stockfish"; -static const string EngineVersion = ""; -static const string AppTag = ""; +/// Version number. If Version is left empty, then compile date in the format +/// DD-MM-YY and show in engine_info. +static const string Version = ""; -/// 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 is empty. +/// engine_info() returns the full name of the current Stockfish version. This +/// will be either "Stockfish DD-MM-YY" (where DD-MM-YY is the date when +/// the program was compiled) or "Stockfish ", depending on whether +/// Version is empty. -const string engine_name() { +const string engine_info(bool to_uci) { const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); - const string cpu64(CpuIs64Bit ? " 64bit" : ""); - - if (!EngineVersion.empty()) - return AppName + " " + EngineVersion + cpu64; - - stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" string month, day, year; + stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" - date >> month >> day >> year; + s << "Stockfish " << Version << setfill('0'); + + if (Version.empty()) + { + date >> month >> day >> year; + s << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2); + } - s << setfill('0') << AppName + " " + AppTag + " " - << year.substr(2, 2) << setw(2) - << (1 + months.find(month) / 4) << setw(2) - << day << cpu64; + s << (Is64Bit ? " 64" : "") + << (HasPopCnt ? " SSE4.2" : "") + << (to_uci ? "\nid author ": " by ") + << "Tord Romstad, Marco Costalba and Joona Kiiski"; return s.str(); } -/// Our brave developers! Required by UCI +/// Debug functions used mainly to collect run-time statistics -const string engine_authors() { +static int64_t hits[2], means[2]; - return "Tord Romstad, Marco Costalba and Joona Kiiski"; +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_print() { + + 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 " + << (double)means[1] / means[0] << endl; } -/// Debug stuff. Helper functions used mainly for debugging purposes +/// 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 whilst preserving +/// usual i/o functionality, all without changing a single line of code! +/// Idea from http://groups.google.com/group/comp.lang.c++/msg/1d941c0f26ea0d81 -static uint64_t dbg_hit_cnt0; -static uint64_t dbg_hit_cnt1; -static uint64_t dbg_mean_cnt0; -static uint64_t dbg_mean_cnt1; +struct Tie: public streambuf { // MSVC requires splitted streambuf for cin and cout -void dbg_print_hit_rate() { + Tie(streambuf* b, ofstream* f) : buf(b), file(f) {} - if (dbg_hit_cnt0) - cerr << "Total " << dbg_hit_cnt0 << " Hit " << dbg_hit_cnt1 - << " hit rate (%) " << 100 * dbg_hit_cnt1 / dbg_hit_cnt0 << endl; -} + 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(), ">> "); } -void dbg_print_mean() { + streambuf* buf; + ofstream* file; - if (dbg_mean_cnt0) - cerr << "Total " << dbg_mean_cnt0 << " Mean " - << (float)dbg_mean_cnt1 / dbg_mean_cnt0 << endl; -} + int log(int c, const char* prefix) { -void dbg_mean_of(int v) { + static int last = '\n'; - dbg_mean_cnt0++; - dbg_mean_cnt1 += v; -} + if (last == '\n') + file->rdbuf()->sputn(prefix, 3); -void dbg_hit_on(bool b) { + return last = file->rdbuf()->sputc((char)c); + } +}; - dbg_hit_cnt0++; - if (b) - dbg_hit_cnt1++; -} +class Logger { -void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); } -void dbg_before() { dbg_hit_on(false); } -void dbg_after() { dbg_hit_on(true); dbg_hit_cnt0--; } + Logger() : in(cin.rdbuf(), &file), out(cout.rdbuf(), &file) {} + ~Logger() { start(false); } + ofstream file; + Tie in, out; -/// get_system_time() returns the current system time, measured in milliseconds +public: + static void start(bool b) { -int get_system_time() { + static Logger l; -#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 (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(); + } + } +}; -/// cpu_count() tries to detect the number of CPU cores +/// Used to serialize access to std::cout to avoid multiple threads writing at +/// the same time. -int cpu_count() { +std::ostream& operator<<(std::ostream& os, SyncCout sc) { -#if defined(_MSC_VER) - SYSTEM_INFO s; - GetSystemInfo(&s); - return std::min(int(s.dwNumberOfProcessors), MAX_THREADS); -#else + static Mutex m; -# if defined(_SC_NPROCESSORS_ONLN) - return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS); -# elif defined(__hpux) - struct pst_dynamic psd; - if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) - return 1; - return std::min((int)psd.psd_proc_cnt, MAX_THREADS); -# else - return 1; -# endif + if (sc == IO_LOCK) + m.lock(); -#endif + if (sc == IO_UNLOCK) + m.unlock(); + + return os; } -/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap -/// conversion from milliseconds to struct timespec, as used by pthreads. +/// Trampoline helper to avoid moving Logger to misc.h +void start_logger(bool b) { Logger::start(b); } -void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) { -#if defined(_MSC_VER) - int tm = msec; -#else - struct timeval t; - struct timespec abstime, *tm = &abstime; +/// timed_wait() waits for msec milliseconds. It is mainly a helper to wrap +/// the conversion from milliseconds to struct timespec, as used by pthreads. - gettimeofday(&t, NULL); +void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) { - abstime.tv_sec = t.tv_sec + (msec / 1000); - abstime.tv_nsec = (t.tv_usec + (msec % 1000) * 1000) * 1000; +#ifdef _WIN32 + int tm = msec; +#else + timespec ts, *tm = &ts; + uint64_t ms = Time::now() + msec; - if (abstime.tv_nsec > 1000000000LL) - { - abstime.tv_sec += 1; - abstime.tv_nsec -= 1000000000LL; - } + ts.tv_sec = ms / 1000; + ts.tv_nsec = (ms % 1000) * 1000000LL; #endif cond_timedwait(sleepCond, sleepLock, tm); } -/// 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) +/// prefetch() preloads the given address in L1/L2 cache. This is a non-blocking +/// function that doesn't stall the CPU waiting for data to be loaded from memory, +/// which can be quite slow. +#ifdef NO_PREFETCH void prefetch(char*) {} @@ -213,14 +188,17 @@ void prefetch(char*) {} void prefetch(char* addr) { -#if defined(__INTEL_COMPILER) || defined(__ICL) - // This hack prevents prefetches to be optimized away by - // Intel compiler. Both MSVC and gcc seems not affected. +# if defined(__INTEL_COMPILER) + // This hack prevents prefetches from being optimized away by + // Intel compiler. Both MSVC and gcc seem not be affected by this. __asm__ (""); -#endif +# endif - _mm_prefetch(addr, _MM_HINT_T2); - _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead +# if defined(__INTEL_COMPILER) || defined(_MSC_VER) + _mm_prefetch(addr, _MM_HINT_T0); +# else + __builtin_prefetch(addr); +# endif } #endif