use super::slice::{SliceArg, SliceInfo};
use super::trait_def::TensorViewOps;
use crate::cuda;
use crate::cuda::Stream;
use crate::dtype::{get_dtype_info, DType};
use crate::kernel::*;
use crate::tensor::{ArcTensor, DataPtr, RcTensor, Tensor};
use crate::Device;
use cudarc::driver::DevicePtr;
use parking_lot::ReentrantMutexGuard;
use std::cell::RefCell;
use std::cell::{Ref, RefMut};
use std::ops::{Deref, DerefMut};
use std::rc::Rc;
use std::sync::{Arc, Mutex};
fn lock_rc(handle: &RcTensor) -> &RefCell<Tensor> {
&*handle.0
}
fn lock_arc(handle: &ArcTensor) -> parking_lot::ReentrantMutexGuard<RefCell<Tensor>> {
handle.0.lock()
}
fn into_rc(t: Tensor) -> RcTensor {
RcTensor::from(t)
}
fn into_arc(t: Tensor) -> ArcTensor {
ArcTensor::from(t)
}
macro_rules! impl_tensor_view {
($name:ident, $handle:ty, $lock:ident, $into_handle:expr) => {
#[derive(Clone)]
pub struct $name {
handle: $handle,
offset: usize,
shape: Vec<usize>,
strides: Vec<usize>,
dtype: DType,
device: Device,
}
impl $name {
pub fn new(handle: $handle) -> Self {
let (shape, strides, dtype, device) = {
let cell = $lock(&handle);
let tensor = cell.borrow(); (
tensor.shape().to_vec(),
tensor.strides().to_vec(),
tensor.dtype(),
tensor.device(),
)
};
$name {
handle,
offset: 0,
shape,
strides,
dtype,
device,
}
}
pub fn into_handle(self) -> $handle {
self.handle
}
pub fn handle(&self) -> &$handle {
&self.handle
}
fn create_output(&self) -> Result<Self, String> {
self.create_output_on_device(self.device)
}
fn create_output_on_device(&self, device: Device) -> Result<Self, String> {
let elem_size = get_dtype_info(self.dtype).unwrap().size;
let total_bytes = self.size() * elem_size;
let shape = self.shape().to_vec();
let dtype = self.dtype;
let new_tensor = match device {
Device::Cpu => {
let bytes = vec![0u8; total_bytes].into_boxed_slice();
Tensor::new_cpu_from_bytes(bytes, shape, dtype)?
}
Device::Cuda(dev_id) => {
let stream = cuda::get_stream().map_err(|e| e.to_string())?;
if stream.device_id != dev_id {
return Err(format!(
"Stream device {} does not match target device {}",
stream.device_id, dev_id
));
}
let gpu_mem = stream
.inner()
.alloc_zeros::<u8>(total_bytes)
.map_err(|e| e.to_string())?;
let strides = Tensor::compute_row_major_strides(&shape, elem_size);
Tensor {
data: DataPtr::Gpu(gpu_mem),
shape,
strides,
dtype,
device,
}
}
};
Ok($name::new($into_handle(new_tensor)))
}
}
impl TensorViewOps for $name {
type Handle = $handle;
fn new(handle: $handle) -> Self {
Self::new(handle)
}
fn as_strided(
&self,
new_shape: Vec<usize>,
new_strides: Vec<usize>,
offset: usize,
) -> Self {
assert_eq!(new_shape.len(), new_strides.len());
$name {
handle: self.handle.clone(),
offset: self.offset + offset,
shape: new_shape,
strides: new_strides,
dtype: self.dtype,
device: self.device,
}
}
fn is_contiguous(&self) -> bool {
let elem_size = get_dtype_info(self.dtype).unwrap().size;
let expected = Tensor::compute_row_major_strides(&self.shape, elem_size);
self.strides == expected
}
fn shape(&self) -> &[usize] {
&self.shape
}
fn strides(&self) -> &[usize] {
&self.strides
}
fn offset(&self) -> usize {
self.offset
}
fn dtype(&self) -> DType {
self.dtype
}
fn size(&self) -> usize {
self.shape.iter().product()
}
fn assign(&mut self, src: &Self) -> Result<(), String> {
if self.shape != src.shape {
return Err("Shape mismatch".into());
}
src.strided_copy_to(self)
}
$crate::impl_device_transfer!($name, $lock, $into_handle);
$crate::impl_broadcast_to!($name, $lock, $into_handle);
$crate::impl_transpose!($name, $lock, $into_handle);
$crate::impl_slice!($name, $lock, $into_handle);
$crate::impl_concat_split!($name, $lock, $into_handle);
$crate::impl_strided_copy_to!($name, $lock, $into_handle);
$crate::impl_contiguous!($name, $lock, $into_handle);
$crate::impl_matmul_with_out!($name, $lock, $into_handle);
$crate::impl_matmul!($name, $lock, $into_handle);
}
$crate::impl_add_for_view!($name, $lock, $into_handle);
};
}
impl_tensor_view!(RcTensorView, RcTensor, lock_rc, into_rc);
impl_tensor_view!(ArcTensorView, ArcTensor, lock_arc, into_arc);
pub trait AsView {
type View: TensorViewOps;
fn as_view(&self) -> Self::View;
}
macro_rules! define_view_to_vec {
($func_name:ident, $view_type:ident, $into_handle:expr, $lock:ident) => {
fn $func_name<T: bytemuck::Pod + crate::dtype::DTypeMapping>(view: &$view_type) -> Vec<T> {
let cpu_view = view.to_cpu().expect("Failed to copy to CPU");
let cell = $lock(&cpu_view.handle);
let tensor = cell.borrow(); let bytes = tensor.as_bytes().expect("Failed to get bytes");
let result = unsafe {
std::slice::from_raw_parts(bytes.as_ptr() as *const T, view.size()).to_vec()
};
result
}
};
}
define_view_to_vec!(rc_view_to_vec, RcTensorView, into_rc, lock_rc);
define_view_to_vec!(arc_view_to_vec, ArcTensorView, into_arc, lock_arc);
pub fn rc_view_to_vec_f32(view: &RcTensorView) -> Vec<f32> {
rc_view_to_vec(view)
}
pub fn arc_view_to_vec_f32(view: &ArcTensorView) -> Vec<f32> {
arc_view_to_vec(view)
}
#[cfg(test)]
mod tests {
use super::*;
use crate::cuda::{
self, get_device_count as get_cuda_device_count, is_available as cuda_available,
set_device as set_current_device,
};
use crate::s;
use crate::tensor::Tensor;
use crate::view::trait_def::TensorViewOps;
use crate::DTYPE_FLOAT32;
#[test]
fn test_rc_view_creation() {
let t = Tensor::new_cpu_from_f32(vec![1.0, 2.0, 3.0, 4.0], vec![2, 2]);
let view = t.into_rc().as_view();
assert_eq!(view.shape(), &[2, 2]);
assert_eq!(view.strides(), &[8, 4]);
assert_eq!(view.offset(), 0);
}
#[test]
fn test_arc_view_creation() {
let t = Tensor::new_cpu_from_f32(vec![1.0, 2.0, 3.0, 4.0], vec![2, 2]);
let view = t.into_arc().as_view();
assert_eq!(view.shape(), &[2, 2]);
assert_eq!(view.strides(), &[8, 4]);
assert_eq!(view.offset(), 0);
}
#[test]
fn test_rc_contiguous() {
let t = Tensor::new_cpu_from_f32((0..6).map(|x| x as f32).collect(), vec![2, 3]);
let view = t.into_rc().as_view();
let transposed = view.as_strided(vec![3, 2], vec![4, 12], 0);
let out_tensor = Tensor::new_cpu_from_bytes(
vec![0u8; 6 * 4].into_boxed_slice(),
vec![3, 2],
DTYPE_FLOAT32,
)
.unwrap();
let out_handle = out_tensor.into_rc();
let mut out_view = RcTensorView::new(out_handle);
transposed.contiguous(&mut out_view).unwrap();
assert_eq!(
rc_view_to_vec_f32(&out_view),
vec![0.0, 3.0, 1.0, 4.0, 2.0, 5.0]
);
}
#[test]
fn test_arc_contiguous() {
let t = Tensor::new_cpu_from_f32((0..6).map(|x| x as f32).collect(), vec![2, 3]);
let view = t.into_arc().as_view();
let transposed = view.as_strided(vec![3, 2], vec![4, 12], 0);
let out_tensor = Tensor::new_cpu_from_bytes(
vec![0u8; 6 * 4].into_boxed_slice(),
vec![3, 2],
DTYPE_FLOAT32,
)
.unwrap();
let out_handle = out_tensor.into_arc();
let mut out_view = ArcTensorView::new(out_handle);
transposed.contiguous(&mut out_view).unwrap();
assert_eq!(
arc_view_to_vec_f32(&out_view),
vec![0.0, 3.0, 1.0, 4.0, 2.0, 5.0]
);
}
#[test]
fn test_arc_slice_add_assign() {
let a = Tensor::new_cpu_from_f32(vec![1.0, 2.0, 3.0, 4.0], vec![2, 2]);
let b = Tensor::new_cpu_from_f32(vec![5.0, 6.0], vec![1, 2]);
let mut a_view = a.into_arc().as_view();
let b_view = b.into_arc().as_view();
let mut sub = a_view.slice(&s![1..2, ..]).unwrap();
sub += b_view;
assert_eq!(arc_view_to_vec_f32(&a_view), vec![1.0, 2.0, 8.0, 10.0]);
}
#[test]
fn test_stream_wait_event() {
if !cuda::is_available() {
return;
}
cuda::set_device(0).unwrap();
let stream1 = cuda::Stream::new(None).unwrap(); let stream2 = cuda::Stream::new(None).unwrap();
let a_cpu = Tensor::new_cpu_from_f32(vec![1.0, 2.0], vec![2]);
let b_cpu = Tensor::new_cpu_from_f32(vec![3.0, 4.0], vec![2]);
let a_gpu = a_cpu.into_arc().as_view().to_gpu(0).unwrap();
let b_gpu = b_cpu.into_arc().as_view().to_gpu(0).unwrap();
let zero_cpu1 = Tensor::new_contiguous(vec![2], DTYPE_FLOAT32).unwrap();
let mut out_gpu = zero_cpu1.into_arc().as_view().to_gpu(0).unwrap();
ArcTensorView::add(&a_gpu, &b_gpu, &mut out_gpu).unwrap();
let event = stream1.record().unwrap();
stream2.wait_event(&event).unwrap();
let zero_cpu2 = Tensor::new_contiguous(vec![2], DTYPE_FLOAT32).unwrap();
let mut out2_gpu = zero_cpu2.into_arc().as_view().to_gpu(0).unwrap();
ArcTensorView::add(&out_gpu, &out_gpu, &mut out2_gpu).unwrap();
stream2.synchronize().unwrap();
let result = arc_view_to_vec_f32(&out2_gpu);
assert_eq!(result, vec![8.0, 12.0]);
}
#[test]
fn test_device_context_switch() {
if !cuda::is_available() {
return;
}
let dev_count = get_cuda_device_count().unwrap();
if dev_count < 2 {
return;
}
cuda::set_device(0).unwrap();
let a = Tensor::new_cpu_from_f32(vec![1.0, 2.0], vec![2]);
let a_view = a.into_arc().as_view();
let a_gpu = a_view.to_gpu(0).unwrap();
cuda::set_device(1);
let b = Tensor::new_cpu_from_f32(vec![3.0, 4.0], vec![2]);
let b_view = b.into_arc().as_view();
let b_gpu = b_view.to_gpu(1).unwrap();
let zero_cpu = Tensor::new_contiguous(vec![2], DTYPE_FLOAT32).unwrap();
let mut out_gpu = zero_cpu.into_arc().as_view().to_gpu(0).unwrap();
let result = ArcTensorView::add(&a_gpu, &b_gpu, &mut out_gpu);
assert!(result.is_err());
}
}