Linux: added support for transparent huge pages

src/backend/cpu/CpuWorker.cpp

@@ -87,14 +87,14 @@ xmrig::CpuWorker<N>::CpuWorker(size_t id, const CpuLaunchData &data) :
         if (!cn_heavyZen3Memory) {
             // Round up number of threads to the multiple of 8
             const size_t num_threads = ((m_threads + 7) / 8) * 8;
-            cn_heavyZen3Memory = new VirtualMemory(m_algorithm.l3() * num_threads, data.hugePages, false, false, node());
+            cn_heavyZen3Memory = new VirtualMemory(m_algorithm.l3() * num_threads, data.hugePages, false, false, node(), VirtualMemory::kDefaultHugePageSize);
         }
         m_memory = cn_heavyZen3Memory;
     }
     else
 #   endif
     {
-        m_memory = new VirtualMemory(m_algorithm.l3() * N, data.hugePages, false, true, node());
+        m_memory = new VirtualMemory(m_algorithm.l3() * N, data.hugePages, false, true, node(), VirtualMemory::kDefaultHugePageSize);
     }
 
 #   ifdef XMRIG_ALGO_GHOSTRIDER

src/crypto/common/MemoryPool.cpp

@@ -49,7 +49,7 @@ xmrig::MemoryPool::MemoryPool(size_t size, bool hugePages, uint32_t node)
 
     constexpr size_t alignment = 1 << 24;
 
-    m_memory = new VirtualMemory(size * pageSize + alignment, hugePages, false, false, node);
+    m_memory = new VirtualMemory(size * pageSize + alignment, hugePages, false, false, node, VirtualMemory::kDefaultHugePageSize);
 
     m_alignOffset = (alignment - (((size_t)m_memory->scratchpad()) % alignment)) % alignment;
 }

src/crypto/common/VirtualMemory.cpp

@@ -75,6 +75,16 @@ xmrig::VirtualMemory::VirtualMemory(size_t size, bool hugePages, bool oneGbPages
     }
 
     m_scratchpad = static_cast<uint8_t*>(_mm_malloc(m_size, alignSize));
+
+    // Huge pages failed to allocate, but try to enable transparent huge pages for the range
+    if (alignSize >= kDefaultHugePageSize) {
+        if (m_scratchpad) {
+            adviseLargePages(m_scratchpad, m_size);
+        }
+        else {
+            m_scratchpad = static_cast<uint8_t*>(_mm_malloc(m_size, 64));
+        }
+    }
 }
 
 

src/crypto/common/VirtualMemory.h

@@ -65,6 +65,7 @@ public:
     static void *allocateExecutableMemory(size_t size, bool hugePages);
     static void *allocateLargePagesMemory(size_t size);
     static void *allocateOneGbPagesMemory(size_t size);
+    static bool adviseLargePages(void *p, size_t size);
     static void destroy();
     static void flushInstructionCache(void *p, size_t size);
     static void freeLargePagesMemory(void *p, size_t size);

src/crypto/common/VirtualMemory_unix.cpp

@@ -276,6 +276,16 @@ bool xmrig::VirtualMemory::allocateOneGbPagesMemory()
 }
 
 
+bool xmrig::VirtualMemory::adviseLargePages(void *p, size_t size)
+{
+#   ifdef XMRIG_OS_LINUX
+    return (madvise(p, size, MADV_HUGEPAGE) == 0);
+#   else
+    return false;
+#   endif
+}
+
+
 void xmrig::VirtualMemory::freeLargePagesMemory()
 {
     if (m_flags.test(FLAG_LOCK)) {

src/crypto/common/VirtualMemory_win.cpp

@@ -260,6 +260,12 @@ bool xmrig::VirtualMemory::allocateOneGbPagesMemory()
 }
 
 
+bool xmrig::VirtualMemory::adviseLargePages(void *p, size_t size)
+{
+    return false;
+}
+
+
 void xmrig::VirtualMemory::freeLargePagesMemory()
 {
     freeLargePagesMemory(m_scratchpad, m_size);

src/crypto/rx/RxDataset.cpp

@@ -215,7 +215,7 @@ void xmrig::RxDataset::allocate(bool hugePages, bool oneGbPages)
         return;
     }
 
-    m_memory  = new VirtualMemory(maxSize(), hugePages, oneGbPages, false, m_node);
+    m_memory  = new VirtualMemory(maxSize(), hugePages, oneGbPages, false, m_node, VirtualMemory::kDefaultHugePageSize);
 
     if (m_memory->isOneGbPages()) {
         m_scratchpadOffset = maxSize() + RANDOMX_CACHE_MAX_SIZE;

src/net/JobResults.cpp

@@ -115,7 +115,7 @@ static inline void checkHash(const JobBundle &bundle, std::vector<JobResult> &re
 static void getResults(JobBundle &bundle, std::vector<JobResult> &results, uint32_t &errors, bool hwAES)
 {
     const auto &algorithm = bundle.job.algorithm();
-    auto memory           = new VirtualMemory(algorithm.l3(), false, false, false);
+    auto memory           = new VirtualMemory(algorithm.l3(), false, false, false, 0, VirtualMemory::kDefaultHugePageSize);
     alignas(16) uint8_t hash[32]{ 0 };
 
     if (algorithm.family() == Algorithm::RANDOM_X) {