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GPU StorageBoost

GPU StorageBoost™ (GSB) optimizes data transfers between NVMe storage and GPUs for maximum performance and efficiency. It eliminates CPU involvement in I/O operations, allowing more CPU cores to focus on application performance.

File APIs are provided as an abstraction layer to use GSB features in the existing AI framework (e.g., Microsoft DeepSpeed).

Example​

Here is an example of using GSB APIs.

example_gsb.cc
#include <libmango.h>

int main()
{
  // create a GSB handle
  mango_file_gsb_h gsb;
  mango_file_gsb_create(&gsb);

  // enable GSB
  mango_file_gsb_enable(gsb);

  // create a GPU handle with the first AMD GPU device
  mango_gpu_h gpu;
  mango_gpu_create (&gpu);
  mango_gpu_open (gpu, MANGO_GPU_AMD, 0)

  // allocate GPU memory
  size_t size = ...;
  void *gpu_buf;
  mango_gpu_alloc_data (gpu, size, &gpu_buf);

  // register GPU memory
  mango_file_gmem_h gmem;
  mango_file_register_gmem(gsb, gpu_buf, size, &gmem);

  // read from file to GPU memory
  int fd = open (...);
  loff_t file_offset = ...;
  loff_t gpu_offset = ...;
  while (1) {
    mango_file_read(gsb, fd, gpu_buf, size, file_offset, gpu_offset);
    ...
  }

  // unregister and free GPU memory
  mango_file_unregister_gmem(gmem);
  mango_gpu_free_data (gpu, gpu_buf);
  mango_gpu_destroy (gpu);

  // disable GSB
  mango_file_gsb_disable(gsb);
  mango_file_gsb_delete(gsb);

  return 0;
}

Datatypes​

mango_file_gmem_h​

typedef void * mango_file_gmem_h;

A handle of mango file gpu memory.

mango_file_gsb_h​

typedef void * mango_file_gsb_h;

A handle of mango gpu storage boost.

mango_file_stream_h​

typedef void * mango_file_stream_h;

A handle of mango file stream.

Functions​

mango_file_create_stream​

mango_status_e mango_file_create_stream(mango_file_stream_h *stream,
                                        unsigned depth)

Create a stream for async operations of mango file.

Parameters

  • out stream The mango file stream.
  • in depth The stream depth.

Returns 0 on success, Otherwise, a negative error value.

mango_file_delete_stream​

mango_status_e mango_file_delete_stream(mango_file_stream_h stream)

Delete a stream for async operations of mango file.

Parameters

  • in stream The mango file stream.

Returns 0 on success, Otherwise, a negative error value.

mango_file_gsb_create​

mango_status_e mango_file_gsb_create(mango_file_gsb_h *gsb)

Create GSB handle.

Parameters

  • out gsb The gpu storage boost handle.

Returns 0 on success, Otherwise, a negative error value.

mango_file_gsb_delete​

mango_status_e mango_file_gsb_delete(mango_file_gsb_h gsb)

Delete GSB handle.

Parameters

  • in gsb The gpu storage boost handle.

Returns 0 on success, Otherwise, a negative error value.

note

Close the FD.

mango_file_gsb_disable​

mango_status_e mango_file_gsb_disable(mango_file_gsb_h gsb)

Disable GPU StorageBoost.

Parameters

  • in gsb The gpu storage boost handle.

Returns 0 on success, Otherwise, a negative error value.

note

Close the FD of mango fs.

mango_file_gsb_enable​

mango_status_e mango_file_gsb_enable(mango_file_gsb_h gsb)

Enable GPU StorageBoost.

Parameters

  • in gsb The gpu storage boost handle.

Returns 0 on success, Otherwise, a negative error value.

note

Open the FD of mango fs.

mango_file_read​

size_t mango_file_read(mango_file_gsb_h gsb,
                       int fd,
                       void *buf_base_addr,
                       size_t size,
                       loff_t file_offset,
                       loff_t buf_offset)

Read from a file to GPU memory.

Parameters

  • in gsb The gpu storage boost handle.
  • in fd The file descriptor of the target file.
  • in buf_base_addr The base address of GPU memory buffer.
  • in size The size of GSB operation.
  • in file_offset The file offset.
  • in buf_offset The buffer offset.

Returns The size of file read on success, Otherwise, a negative error value.

mango_file_read_async​

mango_status_e mango_file_read_async(mango_file_gsb_h gsb,
                                     int fd,
                                     loff_t file_offset,
                                     void *gpuvaddr,
                                     size_t size,
                                     long **bytes_read_p,
                                     mango_file_stream_h stream)

Async Read from a file to GPU memory.

Parameters

  • in gsb The gpu storage boost handle.
  • in fd The file descriptor of the target file.
  • in file_offset The file offset.
  • in gpuvaddr The GPU virtual address.
  • in size The size of GSB operation.
  • in bytes_read_p The ptr of the bytes read
  • in stream The GSB stream.

Returns 0 on success, Otherwise, a negative error value.

mango_file_register_gmem​

mango_status_e mango_file_register_gmem(mango_file_gsb_h gsb,
                                        const void *gpuvaddr,
                                        size_t size,
                                        mango_file_gmem_h *gmem)

Register GPU memory and Pin the memory.

Parameters

  • in gsb The gpu storage boost handle.
  • in gpuvaddr The base GPU virtual address.
  • in size The GPU memory size.
  • out gmem The gpu memory handle.

Returns 0 on success, Otherwise, a negative error value.

mango_file_stream_sync​

mango_status_e mango_file_stream_sync(mango_file_stream_h stream,
                                      useconds_t max_wait,
                                      useconds_t interval)

Synchronize all async operations on the stream.

Parameters

  • in stream The mango file stream.
  • in max_wait The microseconds to wait.
  • in interval The microseconds for wait interval.

Returns 0 on success, Otherwise, a negative error value.

mango_file_unregister_gmem​

mango_status_e mango_file_unregister_gmem(mango_file_gmem_h gmem)

Unregister GPU memory and Unpin the memory.

Parameters

  • in gmem The gpu memory handle.

Returns 0 on success, Otherwise, a negative error value.

mango_file_write​

size_t mango_file_write(mango_file_gsb_h gsb,
                        int fd,
                        void *buf_base_addr,
                        size_t size,
                        loff_t file_offset,
                        loff_t buf_offset)

Write from GPU memory to a file.

Parameters

  • in gsb The gpu storage boost handle.
  • in fd The file descriptor of the target file.
  • in buf_base_addr The base address of GPU memory buffer.
  • in size The size of GSB operation.
  • in file_offset The file offset.
  • in buf_offset The buffer offset.

Returns The size of file write on success, Otherwise, a negative error value.

mango_file_write_async​

mango_status_e mango_file_write_async(mango_file_gsb_h gsb,
                                      int fd,
                                      loff_t file_offset,
                                      void *gpuvaddr,
                                      size_t size,
                                      long **bytes_write_p,
                                      mango_file_stream_h stream)

Async write from GPU memory to a file.

Parameters

  • in gsb The gpu storage boost handle.
  • in fd The file descriptor of the target file.
  • in file_offset The file offset.
  • in gpuvaddr The GPU virtual address.
  • in size The size of GSB operation.
  • in bytes_write_p The ptr of the bytes write
  • in stream The GSB stream.

Returns 0 on success, Otherwise, a negative error value.