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use super::{CheckRequest, GpuError, Message};
use std::sync::mpsc::{channel, Receiver, Sender};
use std::thread::JoinHandle;
type Buffer<'a> = (&'a [u64], &'a [Vec<u32>]);
#[derive(Debug)]
struct RequestBuffer {
mask_buff: Vec<u64>,
row_buff: Vec<Vec<u32>>,
pointer: usize,
}
impl RequestBuffer {
pub fn new(size: usize) -> Self {
RequestBuffer {
mask_buff: vec![0; size],
row_buff: vec![Vec::new(); size],
pointer: 0,
}
}
pub fn read(&mut self, request: CheckRequest) -> Result<Option<Buffer>, GpuError> {
self.mask_buff[self.pointer] = request.bitmask;
self.row_buff[self.pointer] = request.rows;
self.pointer += 1;
if self.pointer == self.mask_buff.len() {
self.pointer = 0;
return Ok(Some((self.mask_buff.as_ref(), self.row_buff.as_ref())));
}
Ok(None)
}
fn flush(&mut self) -> Result<(), GpuError> {
while self.read(CheckRequest::new(vec![], 0, 0))?.is_none() {}
Ok(())
}
}
pub struct OclManager {
job_id: u64,
host_sender: Sender<Message>,
output_sender: Sender<Message>,
receiver: Receiver<Message>,
buffers: Vec<RequestBuffer>,
output_handle: JoinHandle<()>,
host_handle: Option<JoinHandle<()>>,
}
impl OclManager {
pub fn launch_sevice(
permutations: &[Vec<u32>],
permutations_mask: &[u64],
n: u32,
// Workgroup size, set to 0 for max
mut wg_size: usize,
result_output: Sender<Message>,
) -> Result<(Sender<Message>, JoinHandle<()>), GpuError> {
let (h, w) = crate::solvers::wall_stats(n);
let src = include_str!("check.cl");
let platform = ocl::Platform::default();
let device = ocl::Device::first(platform)?;
let max_wg_size = device.max_wg_size()?;
if wg_size == 0 {
wg_size = max_wg_size;
} else if wg_size > max_wg_size {
println!("invalid workgroup size");
}
let (output_sender, output_handle) =
super::output::Output::launch_sevice(permutations, permutations_mask, result_output);
if let Ok((host_sender, host_handle)) = super::host::Host::launch_sevice(
permutations_mask,
n,
h,
w,
wg_size,
src,
output_sender.clone(),
) {
let (sender, receiver) = channel();
println!("wg {}", wg_size);
let mut buffers = Vec::with_capacity((n - h + 1) as usize);
for _ in 0..=(n - h) {
buffers.push(RequestBuffer::new(wg_size as usize));
}
let manager = Self {
job_id: 0,
host_sender,
output_sender,
receiver,
buffers,
output_handle,
host_handle: Some(host_handle),
};
Ok((
sender,
std::thread::Builder::new()
.name("GPU Manager Deamon".into())
.spawn(move || {
if let Err(err) = manager.run() {
println!("{}", err);
}
})
.unwrap(),
))
} else {
Err(GpuError::from(
"Failed to launch the opnecl thread".to_string(),
))
}
}
fn run(mut self) -> Result<(), GpuError> {
loop {
match self.receiver.recv()? {
Message::CheckRequest(request) => {
let queue = request.queue;
//println!("num: {:?} bit {:b}", request.rows, request.bitmask);
if let Some(buffer) = self.buffers[queue as usize].read(request)? {
self.host_sender.send(Message::HostMessage((
self.job_id,
queue,
buffer.0.into(),
)))?;
self.output_sender
.send(Message::OutputMessage((self.job_id, buffer.1.into())))?;
self.job_id += 1;
}
}
Message::CpuDone => {
for (i, b) in self.buffers.iter_mut().enumerate() {
b.flush()?;
self.host_sender.send(Message::HostMessage((
self.job_id,
i as u32,
b.mask_buff.clone(),
)))?;
self.output_sender
.send(Message::OutputMessage((self.job_id, b.row_buff.clone())))?;
self.job_id += 1;
}
println!("flushing buffers");
self.host_sender.send(Message::CpuDone)?;
self.host_handle
.take()
.unwrap()
.join()
.expect("failed to join host thread");
}
Message::Terminate => {
self.output_sender.send(Message::Terminate)?;
self.output_handle
.join()
.expect("failed to join ouput thread");
return Ok(());
}
_ => println!("Invalid MessageType"),
}
}
}
}
|
