/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+ Copyright (C) 2004-2023 The Stockfish developers (see AUTHORS file)
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
// the calls at compile time), try to load them at runtime. To do this we need
// first to define the corresponding function pointers.
extern "C" {
-typedef bool(*fun1_t)(LOGICAL_PROCESSOR_RELATIONSHIP,
- PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX, PDWORD);
-typedef bool(*fun2_t)(USHORT, PGROUP_AFFINITY);
-typedef bool(*fun3_t)(HANDLE, CONST GROUP_AFFINITY*, PGROUP_AFFINITY);
+using fun1_t = bool(*)(LOGICAL_PROCESSOR_RELATIONSHIP,
+ PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX, PDWORD);
+using fun2_t = bool(*)(USHORT, PGROUP_AFFINITY);
+using fun3_t = bool(*)(HANDLE, CONST GROUP_AFFINITY*, PGROUP_AFFINITY);
+using fun4_t = bool(*)(USHORT, PGROUP_AFFINITY, USHORT, PUSHORT);
+using fun5_t = WORD(*)();
+using fun6_t = bool(*)(HANDLE, DWORD, PHANDLE);
+using fun7_t = bool(*)(LPCSTR, LPCSTR, PLUID);
+using fun8_t = bool(*)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
}
#endif
+#include <cmath>
+#include <cstdlib>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <sstream>
+#include <string_view>
#include <vector>
-#include <cstdlib>
#if defined(__linux__) && !defined(__ANDROID__)
#include <stdlib.h>
namespace {
-/// Version number. If Version is left empty, then compile date in the format
-/// DD-MM-YY and show in engine_info.
-const string Version = "";
+/// Version number or dev.
+constexpr string_view version = "dev";
/// 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
} // namespace
-/// engine_info() returns the full name of the current Stockfish version. This
-/// will be either "Stockfish <Tag> DD-MM-YY" (where DD-MM-YY is the date when
-/// the program was compiled) or "Stockfish <Version>", depending on whether
-/// Version is empty.
+/// engine_info() returns the full name of the current Stockfish version.
+/// For local dev compiles we try to append the commit sha and commit date
+/// from git if that fails only the local compilation date is set and "nogit" is specified:
+/// Stockfish dev-YYYYMMDD-SHA
+/// or
+/// Stockfish dev-YYYYMMDD-nogit
+///
+/// For releases (non dev builds) we only include the version number:
+/// Stockfish version
string engine_info(bool to_uci) {
+ stringstream ss;
+ ss << "Stockfish " << version << setfill('0');
- const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
- string month, day, year;
- stringstream ss, date(__DATE__); // From compiler, format is "Sep 21 2008"
-
- ss << "Stockfish " << Version << setfill('0');
-
- if (Version.empty())
+ if constexpr (version == "dev")
{
+ ss << "-";
+ #ifdef GIT_DATE
+ ss << stringify(GIT_DATE);
+ #else
+ constexpr string_view months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
+ string month, day, year;
+ stringstream date(__DATE__); // From compiler, format is "Sep 21 2008"
+
date >> month >> day >> year;
- ss << setw(2) << day << setw(2) << (1 + months.find(month) / 4) << year.substr(2);
+ ss << year << setw(2) << setfill('0') << (1 + months.find(month) / 4) << setw(2) << setfill('0') << day;
+ #endif
+
ss << "-asn";
}
std::string compiler_info() {
- #define stringify2(x) #x
- #define stringify(x) stringify2(x)
#define make_version_string(major, minor, patch) stringify(major) "." stringify(minor) "." stringify(patch)
/// Predefined macros hell:
/// Debug functions used mainly to collect run-time statistics
-static std::atomic<int64_t> hits[2], means[2];
+constexpr int MaxDebugSlots = 32;
+
+namespace {
+
+template<size_t N>
+struct DebugInfo {
+ std::atomic<int64_t> data[N] = { 0 };
+
+ constexpr inline std::atomic<int64_t>& operator[](int index) { return data[index]; }
+};
+
+DebugInfo<2> hit[MaxDebugSlots];
+DebugInfo<2> mean[MaxDebugSlots];
+DebugInfo<3> stdev[MaxDebugSlots];
+DebugInfo<6> correl[MaxDebugSlots];
+
+} // namespace
+
+void dbg_hit_on(bool cond, int slot) {
+
+ ++hit[slot][0];
+ if (cond)
+ ++hit[slot][1];
+}
+
+void dbg_mean_of(int64_t value, int slot) {
+
+ ++mean[slot][0];
+ mean[slot][1] += value;
+}
+
+void dbg_stdev_of(int64_t value, int slot) {
+
+ ++stdev[slot][0];
+ stdev[slot][1] += value;
+ stdev[slot][2] += value * value;
+}
-void dbg_hit_on(bool b) { ++hits[0]; if (b) ++hits[1]; }
-void dbg_hit_on(bool c, bool b) { if (c) dbg_hit_on(b); }
-void dbg_mean_of(int v) { ++means[0]; means[1] += v; }
+void dbg_correl_of(int64_t value1, int64_t value2, int slot) {
+
+ ++correl[slot][0];
+ correl[slot][1] += value1;
+ correl[slot][2] += value1 * value1;
+ correl[slot][3] += value2;
+ correl[slot][4] += value2 * value2;
+ correl[slot][5] += value1 * value2;
+}
void dbg_print() {
- if (hits[0])
- cerr << "Total " << hits[0] << " Hits " << hits[1]
- << " hit rate (%) " << 100 * hits[1] / hits[0] << endl;
+ int64_t n;
+ auto E = [&n](int64_t x) { return double(x) / n; };
+ auto sqr = [](double x) { return x * x; };
+
+ for (int i = 0; i < MaxDebugSlots; ++i)
+ if ((n = hit[i][0]))
+ std::cerr << "Hit #" << i
+ << ": Total " << n << " Hits " << hit[i][1]
+ << " Hit Rate (%) " << 100.0 * E(hit[i][1])
+ << std::endl;
+
+ for (int i = 0; i < MaxDebugSlots; ++i)
+ if ((n = mean[i][0]))
+ {
+ std::cerr << "Mean #" << i
+ << ": Total " << n << " Mean " << E(mean[i][1])
+ << std::endl;
+ }
+
+ for (int i = 0; i < MaxDebugSlots; ++i)
+ if ((n = stdev[i][0]))
+ {
+ double r = sqrtl(E(stdev[i][2]) - sqr(E(stdev[i][1])));
+ std::cerr << "Stdev #" << i
+ << ": Total " << n << " Stdev " << r
+ << std::endl;
+ }
- if (means[0])
- cerr << "Total " << means[0] << " Mean "
- << (double)means[1] / means[0] << endl;
+ for (int i = 0; i < MaxDebugSlots; ++i)
+ if ((n = correl[i][0]))
+ {
+ double r = (E(correl[i][5]) - E(correl[i][1]) * E(correl[i][3]))
+ / ( sqrtl(E(correl[i][2]) - sqr(E(correl[i][1])))
+ * sqrtl(E(correl[i][4]) - sqr(E(correl[i][3]))));
+ std::cerr << "Correl. #" << i
+ << ": Total " << n << " Coefficient " << r
+ << std::endl;
+ }
}
#if defined(POSIXALIGNEDALLOC)
void *mem;
return posix_memalign(&mem, alignment, size) ? nullptr : mem;
-#elif defined(_WIN32)
+#elif defined(_WIN32) && !defined(_M_ARM) && !defined(_M_ARM64)
return _mm_malloc(size, alignment);
+#elif defined(_WIN32)
+ return _aligned_malloc(size, alignment);
#else
return std::aligned_alloc(alignment, size);
#endif
#if defined(POSIXALIGNEDALLOC)
free(ptr);
-#elif defined(_WIN32)
+#elif defined(_WIN32) && !defined(_M_ARM) && !defined(_M_ARM64)
_mm_free(ptr);
+#elif defined(_WIN32)
+ _aligned_free(ptr);
#else
free(ptr);
#endif
#if defined(_WIN32)
-static void* aligned_large_pages_alloc_windows(size_t allocSize) {
+static void* aligned_large_pages_alloc_windows([[maybe_unused]] size_t allocSize) {
#if !defined(_WIN64)
- (void)allocSize; // suppress unused-parameter compiler warning
return nullptr;
#else
if (!largePageSize)
return nullptr;
+ // Dynamically link OpenProcessToken, LookupPrivilegeValue and AdjustTokenPrivileges
+ HMODULE k32 = GetModuleHandle("Advapi32.dll");
+ auto fun6 = (fun6_t)(void(*)())GetProcAddress(k32, "OpenProcessToken");
+ if (!fun6)
+ return nullptr;
+ auto fun7 = (fun7_t)(void(*)())GetProcAddress(k32, "LookupPrivilegeValueA");
+ if (!fun7)
+ return nullptr;
+ auto fun8 = (fun8_t)(void(*)())GetProcAddress(k32, "AdjustTokenPrivileges");
+ if (!fun8)
+ return nullptr;
+
+
// We need SeLockMemoryPrivilege, so try to enable it for the process
- if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hProcessToken))
+ // OpenProcessToken()
+ if (!fun6(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hProcessToken))
return nullptr;
- if (LookupPrivilegeValue(NULL, SE_LOCK_MEMORY_NAME, &luid))
+ // LookupPrivilegeValueA()
+ if (fun7(nullptr, SE_LOCK_MEMORY_NAME, &luid))
{
TOKEN_PRIVILEGES tp { };
TOKEN_PRIVILEGES prevTp { };
// Try to enable SeLockMemoryPrivilege. Note that even if AdjustTokenPrivileges() succeeds,
// we still need to query GetLastError() to ensure that the privileges were actually obtained.
- if (AdjustTokenPrivileges(
+ // AdjustTokenPrivileges()
+ if (fun8(
hProcessToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES), &prevTp, &prevTpLen) &&
GetLastError() == ERROR_SUCCESS)
{
// Round up size to full pages and allocate
allocSize = (allocSize + largePageSize - 1) & ~size_t(largePageSize - 1);
mem = VirtualAlloc(
- NULL, allocSize, MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
+ nullptr, allocSize, MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
// Privilege no longer needed, restore previous state
- AdjustTokenPrivileges(hProcessToken, FALSE, &prevTp, 0, NULL, NULL);
+ // AdjustTokenPrivileges ()
+ fun8(hProcessToken, FALSE, &prevTp, 0, nullptr, nullptr);
}
}
// Fall back to regular, page aligned, allocation if necessary
if (!mem)
- mem = VirtualAlloc(NULL, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+ mem = VirtualAlloc(nullptr, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
return mem;
}
#else
-/// best_group() retrieves logical processor information using Windows specific
-/// API and returns the best group id for the thread with index idx. Original
+/// best_node() retrieves logical processor information using Windows specific
+/// API and returns the best node id for the thread with index idx. Original
/// code from Texel by Peter Österlund.
-int best_group(size_t idx) {
+static int best_node(size_t idx) {
int threads = 0;
int nodes = 0;
DWORD byteOffset = 0;
// Early exit if the needed API is not available at runtime
- HMODULE k32 = GetModuleHandle("Kernel32.dll");
+ HMODULE k32 = GetModuleHandle(TEXT("Kernel32.dll"));
auto fun1 = (fun1_t)(void(*)())GetProcAddress(k32, "GetLogicalProcessorInformationEx");
if (!fun1)
return -1;
- // First call to get returnLength. We expect it to fail due to null buffer
+ // First call to GetLogicalProcessorInformationEx() to get returnLength.
+ // We expect the call to fail due to null buffer.
if (fun1(RelationAll, nullptr, &returnLength))
return -1;
SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *buffer, *ptr;
ptr = buffer = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)malloc(returnLength);
- // Second call, now we expect to succeed
+ // Second call to GetLogicalProcessorInformationEx(), now we expect to succeed
if (!fun1(RelationAll, buffer, &returnLength))
{
free(buffer);
void bindThisThread(size_t idx) {
// Use only local variables to be thread-safe
- int group = best_group(idx);
+ int node = best_node(idx);
- if (group == -1)
+ if (node == -1)
return;
// Early exit if the needed API are not available at runtime
- HMODULE k32 = GetModuleHandle("Kernel32.dll");
+ HMODULE k32 = GetModuleHandle(TEXT("Kernel32.dll"));
auto fun2 = (fun2_t)(void(*)())GetProcAddress(k32, "GetNumaNodeProcessorMaskEx");
auto fun3 = (fun3_t)(void(*)())GetProcAddress(k32, "SetThreadGroupAffinity");
+ auto fun4 = (fun4_t)(void(*)())GetProcAddress(k32, "GetNumaNodeProcessorMask2");
+ auto fun5 = (fun5_t)(void(*)())GetProcAddress(k32, "GetMaximumProcessorGroupCount");
if (!fun2 || !fun3)
return;
- GROUP_AFFINITY affinity;
- if (fun2(group, &affinity))
- fun3(GetCurrentThread(), &affinity, nullptr);
+ if (!fun4 || !fun5)
+ {
+ GROUP_AFFINITY affinity;
+ if (fun2(node, &affinity)) // GetNumaNodeProcessorMaskEx
+ fun3(GetCurrentThread(), &affinity, nullptr); // SetThreadGroupAffinity
+ }
+ else
+ {
+ // If a numa node has more than one processor group, we assume they are
+ // sized equal and we spread threads evenly across the groups.
+ USHORT elements, returnedElements;
+ elements = fun5(); // GetMaximumProcessorGroupCount
+ GROUP_AFFINITY *affinity = (GROUP_AFFINITY*)malloc(elements * sizeof(GROUP_AFFINITY));
+ if (fun4(node, affinity, elements, &returnedElements)) // GetNumaNodeProcessorMask2
+ fun3(GetCurrentThread(), &affinity[idx % returnedElements], nullptr); // SetThreadGroupAffinity
+ free(affinity);
+ }
}
#endif
string binaryDirectory; // path of the executable directory
string workingDirectory; // path of the working directory
-void init(int argc, char* argv[]) {
- (void)argc;
+void init([[maybe_unused]] int argc, char* argv[]) {
string pathSeparator;
// extract the path+name of the executable binary
projects / stockfish / blobdiff