X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc.cpp;h=d436ee92d8559f290facf2ba13f764ae98f31dfb;hb=b96db269a87549ceefaf8b812c050292f81b6c5c;hp=89a2f5ee2e21e183d8c2ff7a715b7e0208574465;hpb=10c1ae8da0b981206a543cff6a2778a277f862df;p=stockfish
diff --git a/src/misc.cpp b/src/misc.cpp
index 89a2f5ee..d436ee92 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) 2008-2012 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
@@ -17,12 +17,14 @@
along with this program. If not, see .
*/
+#if defined(_MSC_VER)
-////
-//// Includes
-////
+#define _CRT_SECURE_NO_DEPRECATE
+#define NOMINMAX // disable macros min() and max()
+#include
+#include
-#if !defined(_MSC_VER)
+#else
# include
# include
@@ -31,306 +33,169 @@
# include
# endif
-#else
-
-#define _CRT_SECURE_NO_DEPRECATE
-#include
-#include
+#endif
+#if !defined(NO_PREFETCH)
+# include
#endif
-#include
-#include
-#include
+#include
#include
#include
#include
-#include "bitcount.h"
#include "misc.h"
+#include "thread.h"
using namespace std;
-/// Version number. If this is left empty, the current date (in the format
-/// YYMMDD) is used as a version number.
-
-static const string EngineVersion = "";
-static const string AppName = "Stockfish";
-static const string AppTag = "";
-
+/// Version number. If Version is left empty, then Tag plus current
+/// date (in the format YYMMDD) is used as a version number.
-////
-//// Variables
-////
+static const string Version = "";
+static const string Tag = "";
-bool Chess960;
-uint64_t dbg_cnt0 = 0;
-uint64_t dbg_cnt1 = 0;
+/// 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.
-bool dbg_show_mean = false;
-bool dbg_show_hit_rate = false;
+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(Is64Bit ? " 64bit" : "");
+ const string popcnt(HasPopCnt ? " SSE4.2" : "");
-////
-//// Functions
-////
+ string month, day, year;
+ stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
-void dbg_hit_on(bool b) {
-
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
- if (b)
- dbg_cnt1++;
-}
+ if (Version.empty())
+ {
+ date >> month >> day >> year;
-void dbg_hit_on_c(bool c, bool b) {
+ s << "Stockfish " << Tag
+ << setfill('0') << " " << year.substr(2)
+ << setw(2) << (1 + months.find(month) / 4)
+ << setw(2) << day << cpu64 << popcnt;
+ }
+ else
+ s << "Stockfish " << Version << cpu64 << popcnt;
- if (c)
- dbg_hit_on(b);
-}
-
-void dbg_before() {
-
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt0++;
-}
+ s << (to_uci ? "\nid author ": " by ")
+ << "Tord Romstad, Marco Costalba and Joona Kiiski";
-void dbg_after() {
-
- assert(!dbg_show_mean);
- dbg_show_hit_rate = true;
- dbg_cnt1++;
-}
-
-void dbg_mean_of(int v) {
-
- assert(!dbg_show_hit_rate);
- dbg_show_mean = true;
- dbg_cnt0++;
- dbg_cnt1 += v;
-}
-
-void dbg_print_hit_rate() {
-
- cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
-}
-
-void dbg_print_mean() {
-
- cout << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
-}
-
-void dbg_print_hit_rate(ofstream& logFile) {
-
- logFile << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
- << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
-}
-
-void dbg_print_mean(ofstream& logFile) {
-
- logFile << "Total " << dbg_cnt0 << " Mean "
- << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
+ return s.str();
}
-/// 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.
-
-const string engine_name() {
- const string cpu64(CpuHas64BitPath ? " 64bit" : "");
+/// Debug functions used mainly to collect run-time statistics
- if (!EngineVersion.empty())
- return AppName+ " " + EngineVersion + cpu64;
+static uint64_t hits[2], means[2];
- string date(__DATE__); // From compiler, format is "Sep 21 2008"
- string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
+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; }
- size_t mon = 1 + months.find(date.substr(0, 3)) / 4;
+void dbg_print() {
- stringstream s;
- string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2));
+ if (hits[0])
+ cerr << "Total " << hits[0] << " Hits " << hits[1]
+ << " hit rate (%) " << 100 * hits[1] / hits[0] << endl;
- string name = AppName + " " + AppTag + " ";
-
- s << name << date.substr(date.length() - 2) << setfill('0')
- << setw(2) << mon << setw(2) << day << cpu64;
-
- return s.str();
+ if (means[0])
+ cerr << "Total " << means[0] << " Mean "
+ << (float)means[1] / means[0] << endl;
}
-/// get_system_time() returns the current system time, measured in
-/// milliseconds.
+/// system_time() returns the current system time, measured in milliseconds
-int get_system_time() {
+int system_time() {
#if defined(_MSC_VER)
- struct _timeb t;
- _ftime(&t);
- return int(t.time*1000 + t.millitm);
+ 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;
+ struct timeval t;
+ gettimeofday(&t, NULL);
+ return t.tv_sec * 1000 + t.tv_usec / 1000;
#endif
}
-/// builtin_cpu_count() tries to detect the number of CPU cores, if
-/// hyper-threading is enabled this is the number of logical processors.
+/// cpu_count() tries to detect the number of CPU cores
+
+int cpu_count() {
-#if !defined(_MSC_VER)
+#if defined(_MSC_VER)
+ SYSTEM_INFO s;
+ GetSystemInfo(&s);
+ return std::min(int(s.dwNumberOfProcessors), MAX_THREADS);
+#else
# if defined(_SC_NPROCESSORS_ONLN)
-static int builtin_cpu_count() {
- return Min(sysconf(_SC_NPROCESSORS_ONLN), 8);
-}
+ return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
# elif defined(__hpux)
-static int builtin_cpu_count() {
struct pst_dynamic psd;
if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1)
return 1;
-
- return Min(psd.psd_proc_cnt, 8);
-}
+ return std::min((int)psd.psd_proc_cnt, MAX_THREADS);
# else
-static int builtin_cpu_count() {
return 1;
-}
# endif
-#else
-
-static int builtin_cpu_count() {
- SYSTEM_INFO s;
- GetSystemInfo(&s);
- return Min(s.dwNumberOfProcessors, 8);
-}
-
#endif
+}
-/// HT_enabled() returns true if hyper-threading is enabled on current machine
-
-static bool HT_enabled() {
-
- char CPUString[0x20];
- int CPUInfo[4] = {-1};
- int nIds, nLogicalCPU, nCores;
-
- // Detect CPU producer
- __cpuid(CPUInfo, 0);
- nIds = CPUInfo[0];
+/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap
+/// conversion from milliseconds to struct timespec, as used by pthreads.
- memset(CPUString, 0, sizeof(CPUString));
- memcpy(&CPUString[0], &CPUInfo[1], sizeof(int));
- memcpy(&CPUString[4], &CPUInfo[3], sizeof(int));
- memcpy(&CPUString[8], &CPUInfo[2], sizeof(int));
+void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) {
- // Not an Intel CPU or CPUID.4 not supported
- if (strcmp(CPUString, "GenuineIntel") || nIds < 4)
- return false;
+#if defined(_MSC_VER)
+ int tm = msec;
+#else
+ struct timeval t;
+ struct timespec abstime, *tm = &abstime;
- // Detect if HT Technology is supported
- __cpuid(CPUInfo, 1);
- if (!((CPUInfo[3] >> 28) & 1))
- return false;
+ gettimeofday(&t, NULL);
- nLogicalCPU = (CPUInfo[1] >> 16) & 0xFF;
+ abstime.tv_sec = t.tv_sec + (msec / 1000);
+ abstime.tv_nsec = (t.tv_usec + (msec % 1000) * 1000) * 1000;
- // Detect number of cores
- __cpuid(CPUInfo, 4);
- nCores = 1 + ((CPUInfo[0] >> 26) & 0x3F);
+ if (abstime.tv_nsec > 1000000000LL)
+ {
+ abstime.tv_sec += 1;
+ abstime.tv_nsec -= 1000000000LL;
+ }
+#endif
- return nLogicalCPU > nCores;
+ cond_timedwait(sleepCond, sleepLock, tm);
}
-/// cpu_count() tries to detect the number of physical CPU cores taking
-/// in account hyper-threading.
+/// 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)
-int cpu_count() {
+void prefetch(char*) {}
- return HT_enabled() ? builtin_cpu_count() / 2 : builtin_cpu_count();
-}
+#else
+void prefetch(char* addr) {
-/*
- 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));
-}
+# if defined(__INTEL_COMPILER) || defined(__ICL)
+ // This hack prevents prefetches to be optimized away by
+ // Intel compiler. Both MSVC and gcc seems not affected.
+ __asm__ ("");
+# endif
-#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;
- }
+ _mm_prefetch(addr, _MM_HINT_T2);
+ _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead
}
+
#endif