Impl MmapFileStream

cpp/core/shuffle/Spill.cc

@@ -73,7 +73,7 @@ void Spill::insertPayload(
 
 void Spill::openSpillFile() {
   if (!is_) {
-    GLUTEN_ASSIGN_OR_THROW(is_, arrow::io::MemoryMappedFile::Open(spillFile_, arrow::io::FileMode::READ));
+    GLUTEN_ASSIGN_OR_THROW(is_, MmapFileStream::open(spillFile_));
     rawIs_ = is_.get();
   }
 }

cpp/core/shuffle/Spill.h

@@ -69,9 +69,8 @@ class Spill final {
   };
 
   SpillType type_;
-  std::shared_ptr<arrow::io::MemoryMappedFile> is_;
+  std::shared_ptr<gluten::MmapFileStream> is_;
   std::list<PartitionPayload> partitionPayloads_{};
-  std::shared_ptr<arrow::io::MemoryMappedFile> inputStream_{};
   std::string spillFile_;
   int64_t spillTime_;
   int64_t compressTime_;

cpp/core/shuffle/Utils.cc

@@ -25,6 +25,9 @@
 #include <numeric>
 #include <sstream>
 #include <thread>
+#include <sys/mman.h>
+#include <glog/logging.h>
+#include <arrow/buffer.h>
 #include "shuffle/Options.h"
 #include "utils/Timer.h"
 
@@ -212,6 +215,96 @@ arrow::Result<std::shared_ptr<arrow::RecordBatch>> makeUncompressedRecordBatch(
   }
   return arrow::RecordBatch::Make(writeSchema, 1, {arrays});
 }
+
+arrow::Result<std::shared_ptr<MmapFileStream>> MmapFileStream::open(const std::string& path) {
+  ARROW_ASSIGN_OR_RAISE(auto fileName, arrow::internal::PlatformFilename::FromString(path));
+
+  ARROW_ASSIGN_OR_RAISE(auto fd, arrow::internal::FileOpenReadable(fileName));
+  ARROW_ASSIGN_OR_RAISE(auto size, arrow::internal::FileGetSize(fd.fd()));
+
+  void* result = mmap(nullptr, size, PROT_READ, MAP_PRIVATE, fd.fd(), 0);
+  if (result == MAP_FAILED) {
+    return arrow::Status::IOError("Memory mapping file failed: ", ::arrow::internal::ErrnoMessage(errno));
+  }
+
+  auto fstream = std::shared_ptr<MmapFileStream>(new MmapFileStream());
+  fstream->fd_ = std::move(fd);
+  fstream->data_ = static_cast<uint8_t *>(result);
+  fstream->size_ = size;
+  return fstream;
+}
+
+void MmapFileStream::advance(int64_t length) {
+  static auto pageSize = static_cast<size_t>(arrow::internal::GetPageSize());
+  static auto pageMask = ~(pageSize - 1);
+  DCHECK_GT(pageSize, 0);
+  DCHECK_EQ(pageMask & pageSize, pageSize);
+
+  auto purgeLength = (pos_ - posRetain_) & pageMask;
+  if (purgeLength > 0) {
+    int ret = madvise(data_ + posRetain_, purgeLength, MADV_DONTNEED);
+    if (ret != 0) {
+      LOG(WARNING) << "fadvise failed " << ::arrow::internal::ErrnoMessage(errno);
+    }
+    posRetain_ += purgeLength;
+  }
+
+  pos_ += length;
+}
+
+void MmapFileStream::willNeed(int64_t length) {
+  static auto pageSize = static_cast<size_t>(arrow::internal::GetPageSize());
+  static auto pageMask = ~(pageSize - 1);
+  DCHECK_GT(pageSize, 0);
+  DCHECK_EQ(pageMask & pageSize, pageSize);
+
+  auto willNeedPos = pos_ & pageMask;
+  auto willNeedLen = pos_ + length - willNeedPos;;
+  int ret = madvise(data_ + willNeedPos, willNeedLen, MADV_WILLNEED);
+  if (ret != 0) {
+    LOG(WARNING) << "madvise willneed failed: " << ::arrow::internal::ErrnoMessage(errno);
+  }
+}
+
+arrow::Status MmapFileStream::Close() {
+  if (data_ != nullptr) {
+    int result = munmap(data_, size_);
+    if (result != 0) {
+      LOG(WARNING) << "munmap failed";
+    }
+    data_ = nullptr;
+  }
+
+  return fd_.Close();
+}
+
+arrow::Result<int64_t> MmapFileStream::Tell() const {
+  return pos_;
+}
+
+arrow::Result<int64_t> MmapFileStream::Read(int64_t nbytes, void* out) {
+  ARROW_ASSIGN_OR_RAISE(nbytes, actualReadSize(nbytes));
+
+  if (nbytes > 0) {
+    memcpy(out, data_ + pos_, nbytes);
+    advance(nbytes);
+  }
+
+  return nbytes;
+}
+
+arrow::Result<std::shared_ptr<arrow::Buffer>> MmapFileStream::Read(int64_t nbytes) {
+  ARROW_ASSIGN_OR_RAISE(nbytes, actualReadSize(nbytes));
+
+  if (nbytes > 0) {
+    auto buffer = std::make_shared<arrow::Buffer>(data_ + pos_, nbytes);
+    willNeed(nbytes);
+    advance(nbytes);
+    return buffer;
+  } else {
+    return std::make_shared<arrow::Buffer>(nullptr, 0);
+  }
+}
 } // namespace gluten
 
 std::string gluten::generateUuid() {

cpp/core/shuffle/Utils.h

@@ -72,4 +72,34 @@ arrow::Result<std::shared_ptr<arrow::RecordBatch>> makeUncompressedRecordBatch(
 
 std::shared_ptr<arrow::Buffer> zeroLengthNullBuffer();
 
+class MmapFileStream : public arrow::io::InputStream {
+ public:
+  static arrow::Result<std::shared_ptr<MmapFileStream>> open(const std::string& path);
+  arrow::Result<int64_t> Tell() const override;
+  arrow::Status Close() override;
+  arrow::Result<int64_t> Read(int64_t nbytes, void* out) override;
+  arrow::Result<std::shared_ptr<arrow::Buffer>> Read(int64_t nbytes) override;
+  bool closed() const override {
+    return data_ == nullptr;
+  };
+
+ private:
+  arrow::Result<int64_t> actualReadSize(int64_t nbytes) {
+    if (nbytes < 0 || pos_ > size_) {
+        return arrow::Status::IOError("Read out of range. Offset: ", pos_, " Size: ", nbytes, " File Size: ", size_);
+    }
+    return std::min(size_ - pos_, nbytes);
+  }
+
+  void advance(int64_t length);
+  void willNeed(int64_t length);
+
+  arrow::internal::FileDescriptor fd_;
+  uint8_t* data_ = nullptr;
+  int64_t size_;
+  int64_t pos_ = 0;
+  int64_t posRetain_ = 0;
+  MmapFileStream() = default;
+};
+
 } // namespace gluten