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use super::{HostMessage, Message, ResultMessage};
use ocl::{flags, Buffer, Context, Device, Kernel, Platform, Program, Queue};
use std::sync::mpsc::{Receiver, Sender};
#[derive(Debug)]
pub struct Host {
#[allow(unused)]
platform: Platform,
#[allow(unused)]
device: Device,
#[allow(unused)]
context: Context,
program: Program,
queue: Queue,
n: u32,
h: u32,
w: u32,
/// Workgroup size, set to 0 for max
wg_size: usize,
permutations: Buffer<u64>,
receiver: Receiver<Message>,
walls: Vec<Vec<u32>>,
}
impl Host {
pub fn launch_sevice(
permutation_masks: &[u64],
n: u32,
h: u32,
w: u32,
mut wg_size: usize,
src: &str,
) -> ocl::Result<(Sender<Message>, std::thread::JoinHandle<()>)> {
let platform = ocl::Platform::default();
let device = ocl::Device::first(platform)?;
let context = ocl::Context::builder()
.platform(platform)
.devices(device.clone())
.build()?;
let queue = ocl::Queue::new(&context, device, None)?;
let program = Program::builder()
.devices(device)
.src(src)
.build(&context)?;
let buffer = ocl::Buffer::builder()
.queue(queue.clone())
.flags(flags::MEM_READ_WRITE)
.copy_host_slice(permutation_masks)
.len(permutation_masks.len())
.build()?;
let max_wg_size = device.max_wg_size()?;
if wg_size == 0 {
wg_size = max_wg_size;
} else if wg_size > max_wg_size {
return Err(ocl::Error::from("invalid workgroup size"));
}
let solver = Self {
platform,
device,
context,
program,
queue,
n,
h,
w,
wg_size,
permutations: buffer,
rec_queues: receivers,
walls: Vec::new(),
};
std::thread::Builder::new()
.name("GPU Deamon".into())
.spawn(move || {
solver.run();
})
.unwrap();
println!("started gpu thread");
Ok(senders)
}
fn get_dim(&self, queue: usize) -> usize {
let chunk = self.permutations.len() / self.n as usize;
let dim = (queue + 1) * chunk;
(dim + self.wg_size - 1) / self.wg_size * self.wg_size
}
fn get_off(&self, queue: usize) -> u64 {
let chunk = self.permutations.len() / self.n as usize;
let off = self.permutations.len() - chunk - self.get_dim(queue);
if off > isize::max_value() as usize {
panic!("workgroup size to big, offset underflow")
}
off as u64
}
fn get_res(&self, queue: usize) -> usize {
let dim = self.get_dim(queue);
dim * self.get_res_save_dim()
}
fn get_res_save_dim(&self) -> usize {
(self.wg_size + 63) / 64
}
fn run(mut self) -> ! {
let queues = self.rec_queues.len();
let mut instruction_buffer = Vec::with_capacity((self.n - self.h) as usize);
let mut result_buffer = Vec::with_capacity((self.n - self.h) as usize);
for i in 0..queues {
let buffer: Buffer<u64> = Buffer::builder()
.queue(self.queue.clone())
.len(self.wg_size)
.flags(flags::MEM_READ_WRITE)
.build()
.unwrap();
instruction_buffer.push(buffer);
let results: Buffer<u64> = Buffer::builder()
.queue(self.queue.clone())
.len(self.get_res(i))
.flags(flags::MEM_READ_WRITE)
.build()
.unwrap();
result_buffer.push(results);
}
println!("finished gpu setup");
for i in (0..self.rec_queues.len()).cycle() {
if let Some(buffer) = self.rec_queues[i].read() {
instruction_buffer[i].write(buffer).enq().unwrap();
let dim = self.get_dim(i);
//println!("dim: {}", dim);
//println!("off: {}", self.get_off(i));
//println!("result size: {}", self.get_res_save_dim());
let kernel = Kernel::builder()
.program(&self.program)
.name("check")
.queue(self.queue.clone())
.global_work_size(dim)
.arg(&self.permutations)
.arg(&result_buffer[i])
.arg(&instruction_buffer[i])
.arg_local::<u64>(self.wg_size)
.arg(self.n)
.arg(self.w)
.arg(self.get_off(i))
.build()
.unwrap();
unsafe {
kernel
.cmd()
.queue(&self.queue)
.global_work_offset(kernel.default_global_work_offset())
.global_work_size(dim)
.local_work_size(self.wg_size)
.enq()
.unwrap();
}
// (5) Read results from the device into a vector (`::block` not shown):
let mut result = vec![0u64; self.get_res(i)];
result_buffer[i]
.cmd()
.queue(&self.queue)
.offset(0)
.read(&mut result)
.enq()
.unwrap();
for (j, r) in result.iter().enumerate() {
if j == 0 {
continue;
}
for b in 0..64 {
if r & (1 << b) != 0 {
let permutation =
j / self.get_res_save_dim() + self.get_off(i) as usize;
let instruction = (j % self.get_res_save_dim()) * 64 + b;
let mut wall = self.rec_queues[i].get_rows()[instruction].clone();
wall.push(permutation as u32);
println!("{:?}", wall);
self.walls.push(wall);
}
}
}
}
}
panic!();
}
}
/*
pub fn check(permutations: &[u64], w: u32, n: u32, mask: u64, offset: usize) -> ocl::Result<()> {
//println!("read src!");
let src = std::fs::read_to_string("src/solvers/check.cl").expect("failed to open kernel file");
//println!("created queue!");
println!("offset: {}", offset);
println!("length: {}", permutations.len() - offset);
let pro_que = ocl::ProQue::builder()
.src(src)
.dims(permutations.len() - offset)
.build()?;
let results = pro_que.create_buffer::<i32>()?;
let kernel = pro_que
.kernel_builder("check")
.arg(get_buffer())
.arg(&results)
.arg(mask)
.arg(n)
.arg(w)
.arg(offset as u64)
//.global_work_offset(offset)
.build()?;
//println!("starting calculation");
unsafe {
kernel.enq()?;
}
let mut vec = vec![0; results.len()];
results.read(&mut vec).enq()?;
if vec.iter().any(|x| *x != 0) {
println!("The resuts are now '{:?}'!", vec);
}
Ok(())
}*/
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