forked from kokkos/kokkos
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Kokkos_SYCL_ParallelFor_Team.hpp
191 lines (167 loc) · 7.38 KB
/
Kokkos_SYCL_ParallelFor_Team.hpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#ifndef KOKKOS_SYCL_PARALLEL_FOR_TEAM_HPP
#define KOKKOS_SYCL_PARALLEL_FOR_TEAM_HPP
#include <Kokkos_Parallel.hpp>
#include <SYCL/Kokkos_SYCL_Team.hpp>
#include <SYCL/Kokkos_SYCL_TeamPolicy.hpp>
#include <vector>
template <typename FunctorType, typename... Properties>
class Kokkos::Impl::ParallelFor<FunctorType, Kokkos::TeamPolicy<Properties...>,
Kokkos::Experimental::SYCL> {
public:
using Policy = TeamPolicyInternal<Kokkos::Experimental::SYCL, Properties...>;
using functor_type = FunctorType;
using size_type = ::Kokkos::Experimental::SYCL::size_type;
private:
using member_type = typename Policy::member_type;
using work_tag = typename Policy::work_tag;
using launch_bounds = typename Policy::launch_bounds;
FunctorType const m_functor;
Policy const m_policy;
size_type const m_league_size;
int m_team_size;
size_type const m_vector_size;
int m_shmem_begin;
int m_shmem_size;
sycl_device_ptr<char> m_global_scratch_ptr;
size_t m_scratch_size[2];
// Only let one ParallelFor instance at a time use the team scratch memory.
// The constructor acquires the mutex which is released in the destructor.
std::scoped_lock<std::mutex> m_scratch_buffers_lock;
int m_scratch_pool_id = -1;
template <typename FunctorWrapper>
sycl::event sycl_direct_launch(const Policy& policy,
const FunctorWrapper& functor_wrapper,
const sycl::event& memcpy_event) const {
// Convenience references
const Kokkos::Experimental::SYCL& space = policy.space();
sycl::queue& q = space.sycl_queue();
desul::ensure_sycl_lock_arrays_on_device(q);
auto parallel_for_event = q.submit([&](sycl::handler& cgh) {
// FIXME_SYCL accessors seem to need a size greater than zero at least for
// host queues
sycl::local_accessor<char, 1> team_scratch_memory_L0(
sycl::range<1>(
std::max(m_scratch_size[0] + m_shmem_begin, size_t(1))),
cgh);
// Avoid capturing *this since it might not be trivially copyable
const auto shmem_begin = m_shmem_begin;
const size_t scratch_size[2] = {m_scratch_size[0], m_scratch_size[1]};
sycl_device_ptr<char> const global_scratch_ptr = m_global_scratch_ptr;
auto lambda = [=](sycl::nd_item<2> item) {
const member_type team_member(
KOKKOS_IMPL_SYCL_GET_MULTI_PTR(team_scratch_memory_L0), shmem_begin,
scratch_size[0],
global_scratch_ptr + item.get_group(1) * scratch_size[1],
scratch_size[1], item, item.get_group_linear_id(),
item.get_group_range(1));
if constexpr (std::is_void<work_tag>::value)
functor_wrapper.get_functor()(team_member);
else
functor_wrapper.get_functor()(work_tag(), team_member);
};
static sycl::kernel kernel = [&] {
sycl::kernel_id functor_kernel_id =
sycl::get_kernel_id<decltype(lambda)>();
auto kernel_bundle =
sycl::get_kernel_bundle<sycl::bundle_state::executable>(
q.get_context(), std::vector{functor_kernel_id});
return kernel_bundle.get_kernel(functor_kernel_id);
}();
auto max_sg_size =
kernel
.get_info<sycl::info::kernel_device_specific::max_sub_group_size>(
q.get_device());
auto final_vector_size = std::min<int>(m_vector_size, max_sg_size);
// FIXME_SYCL For some reason, explicitly enforcing the kernel bundle to
// be used gives a runtime error.
// cgh.use_kernel_bundle(kernel_bundle);
#ifndef KOKKOS_IMPL_SYCL_USE_IN_ORDER_QUEUES
cgh.depends_on(memcpy_event);
#else
(void)memcpy_event;
#endif
cgh.parallel_for(
sycl::nd_range<2>(
sycl::range<2>(m_team_size, m_league_size * final_vector_size),
sycl::range<2>(m_team_size, final_vector_size)),
lambda);
});
#ifndef KOKKOS_IMPL_SYCL_USE_IN_ORDER_QUEUES
q.ext_oneapi_submit_barrier(std::vector<sycl::event>{parallel_for_event});
#endif
return parallel_for_event;
}
public:
inline void execute() const {
if (m_league_size == 0) return;
auto& space = *m_policy.space().impl_internal_space_instance();
Kokkos::Experimental::Impl::SYCLInternal::IndirectKernelMem&
indirectKernelMem = space.get_indirect_kernel_mem();
auto functor_wrapper = Experimental::Impl::make_sycl_function_wrapper(
m_functor, indirectKernelMem);
sycl::event event = sycl_direct_launch(m_policy, functor_wrapper,
functor_wrapper.get_copy_event());
functor_wrapper.register_event(event);
space.register_team_scratch_event(m_scratch_pool_id, event);
}
ParallelFor(FunctorType const& arg_functor, Policy const& arg_policy)
: m_functor(arg_functor),
m_policy(arg_policy),
m_league_size(arg_policy.league_size()),
m_team_size(arg_policy.team_size()),
m_vector_size(arg_policy.impl_vector_length()),
m_scratch_buffers_lock(arg_policy.space()
.impl_internal_space_instance()
->m_team_scratch_mutex) {
// FIXME_SYCL optimize
if (m_team_size < 0)
m_team_size =
m_policy.team_size_recommended(arg_functor, ParallelForTag{});
m_shmem_begin = (sizeof(double) * (m_team_size + 2));
m_shmem_size =
(m_policy.scratch_size(0, m_team_size) +
FunctorTeamShmemSize<FunctorType>::value(m_functor, m_team_size));
m_scratch_size[0] = m_shmem_size;
m_scratch_size[1] = m_policy.scratch_size(1, m_team_size);
// Functor's reduce memory, team scan memory, and team shared memory depend
// upon team size.
auto& space = *m_policy.space().impl_internal_space_instance();
m_scratch_pool_id = space.acquire_team_scratch_space();
m_global_scratch_ptr =
static_cast<sycl_device_ptr<char>>(space.resize_team_scratch_space(
m_scratch_pool_id,
static_cast<ptrdiff_t>(m_scratch_size[1]) * m_league_size));
if (static_cast<int>(space.m_maxShmemPerBlock) <
m_shmem_size - m_shmem_begin) {
std::stringstream out;
out << "Kokkos::Impl::ParallelFor<SYCL> insufficient shared memory! "
"Requested "
<< m_shmem_size - m_shmem_begin << " bytes but maximum is "
<< space.m_maxShmemPerBlock << '\n';
Kokkos::Impl::throw_runtime_exception(out.str());
}
const auto max_team_size =
m_policy.team_size_max(arg_functor, ParallelForTag{});
if (m_team_size > m_policy.team_size_max(arg_functor, ParallelForTag{}))
Kokkos::Impl::throw_runtime_exception(
"Kokkos::Impl::ParallelFor<SYCL> requested too large team size. The "
"maximal team_size is " +
std::to_string(max_team_size) + '!');
}
};
#endif