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Auto-detect the fastest code for dataset init

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This commit is contained in:
SChernykh 2020-12-19 13:59:28 +01:00
parent 7aba194d3b
commit 410313d933
5 changed files with 67 additions and 3 deletions
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40
src/crypto/randomx/jit_compiler_x86.cpp
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@ -214,9 +214,43 @@ namespace randomx {
hasAVX = xmrig::Cpu::info()->hasAVX();
hasAVX2 = xmrig::Cpu::info()->hasAVX2();
// Set to false by default
initDatasetAVX2 = false;
xmrig::ICpuInfo::Vendor vendor = xmrig::Cpu::info()->vendor();
xmrig::ICpuInfo::Arch arch = xmrig::Cpu::info()->arch();
if (vendor == xmrig::ICpuInfo::VENDOR_INTEL) {
// AVX2 init is faster on Intel CPUs without HT
initDatasetAVX2 = xmrig::Cpu::info()->cores() == xmrig::Cpu::info()->threads();
}
else if (vendor == xmrig::ICpuInfo::VENDOR_AMD) {
switch (arch) {
case xmrig::ICpuInfo::ARCH_ZEN:
case xmrig::ICpuInfo::ARCH_ZEN_PLUS:
// AVX2 init is slow on Zen/Zen+
initDatasetAVX2 = false;
break;
case xmrig::ICpuInfo::ARCH_ZEN2:
// AVX2 init is faster on Zen2 without SMT (mobile CPUs)
initDatasetAVX2 = xmrig::Cpu::info()->cores() == xmrig::Cpu::info()->threads();
break;
case xmrig::ICpuInfo::ARCH_ZEN3:
// AVX2 init is faster on Zen3
initDatasetAVX2 = true;
break;
}
}
// Sorry low-end Intel CPUs
if (!hasAVX2) {
initDatasetAVX2 = false;
}
hasXOP = xmrig::Cpu::info()->hasXOP();
allocatedSize = hasAVX2 ? (CodeSize * 4) : (CodeSize * 2);
allocatedSize = initDatasetAVX2 ? (CodeSize * 4) : (CodeSize * 2);
allocatedCode = static_cast<uint8_t*>(allocExecutableMemory(allocatedSize,
# ifdef XMRIG_SECURE_JIT
false
@ -299,7 +333,7 @@ namespace randomx {
template<size_t N>
void JitCompilerX86::generateSuperscalarHash(SuperscalarProgram(&programs)[N]) {
uint8_t* p = code;
if (hasAVX2) {
if (initDatasetAVX2) {
codePos = 0;
emit(codeDatasetInitAVX2_prologue, datasetInitAVX2_prologue_size, code, codePos);
@ -356,7 +390,7 @@ namespace randomx {
void JitCompilerX86::generateDatasetInitCode() {
// AVX2 code is generated in generateSuperscalarHash()
if (!hasAVX2) {
if (!initDatasetAVX2) {
memcpy(code, codeDatasetInit, datasetInitSize);
}
}