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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/**
* Copyright 2023-2024, XGBoost Contributors
*/
#include <gtest/gtest.h> // for ASSERT_EQ
#include <xgboost/span.h> // for Span, oper...
#include <algorithm> // for min
#include <chrono> // for seconds
#include <cstddef> // for size_t
#include <cstdint> // for int32_t
#include <numeric> // for iota
#include <string> // for string
#include <thread> // for thread
#include <vector> // for vector
#include "../../../src/collective/allgather.h" // for RingAllgather
#include "../../../src/collective/coll.h" // for Coll
#include "../../../src/collective/comm.h" // for RabitComm
#include "gtest/gtest.h" // for AssertionR...
#include "test_worker.h" // for TestDistri...
#include "xgboost/collective/result.h" // for Result
namespace xgboost::collective {
namespace {
class AllgatherTest : public TrackerTest {};
class Worker : public WorkerForTest {
public:
using WorkerForTest::WorkerForTest;
void Run() {
{
// basic test
std::vector<std::int32_t> data(comm_.World(), 0);
data[comm_.Rank()] = comm_.Rank();
auto rc = RingAllgather(this->comm_, common::Span{data.data(), data.size()});
SafeColl(rc);
for (std::int32_t r = 0; r < comm_.World(); ++r) {
ASSERT_EQ(data[r], r);
}
}
{
// test for limited socket buffer
this->LimitSockBuf(4096);
std::size_t n = 8192; // n_bytes = 8192 * sizeof(int)
std::vector<std::int32_t> data(comm_.World() * n, 0);
auto s_data = common::Span<std::int32_t>{data};
auto seg = s_data.subspan(comm_.Rank() * n, n);
std::iota(seg.begin(), seg.end(), comm_.Rank());
auto rc = RingAllgather(comm_, common::Span{data.data(), data.size()});
SafeColl(rc);
for (std::int32_t r = 0; r < comm_.World(); ++r) {
auto seg = s_data.subspan(r * n, n);
for (std::int32_t i = 0; i < static_cast<std::int32_t>(seg.size()); ++i) {
auto v = seg[i];
ASSERT_EQ(v, r + i);
}
}
}
}
void CheckV(common::Span<std::int32_t> result) {
std::int32_t k{0};
for (std::int32_t r = 0; r < comm_.World(); ++r) {
auto seg = common::Span{result.data(), result.size()}.subspan(k, (r + 1));
if (comm_.Rank() == 0) {
for (auto v : seg) {
ASSERT_EQ(v, r);
}
k += seg.size();
}
}
}
void TestVRing() {
// V test
std::vector<std::int32_t> data(comm_.Rank() + 1, comm_.Rank());
std::vector<std::int32_t> result;
auto rc = RingAllgatherV(comm_, common::Span{data.data(), data.size()}, &result);
SafeColl(rc);
ASSERT_EQ(result.size(), (1 + comm_.World()) * comm_.World() / 2);
CheckV(result);
}
void TestVBasic() {
// basic test
std::int32_t n{comm_.Rank()};
std::vector<std::int32_t> result;
auto rc = RingAllgatherV(comm_, common::Span{&n, 1}, &result);
SafeColl(rc);
for (std::int32_t i = 0; i < comm_.World(); ++i) {
ASSERT_EQ(result[i], i);
}
}
void TestVAlgo() {
// V test, broadcast
std::vector<std::int32_t> data(comm_.Rank() + 1, comm_.Rank());
auto s_data = common::Span{data.data(), data.size()};
std::vector<std::int64_t> sizes(comm_.World(), 0);
sizes[comm_.Rank()] = s_data.size_bytes();
auto rc = RingAllgather(comm_, common::Span{sizes.data(), sizes.size()});
SafeColl(rc);
std::shared_ptr<Coll> pcoll{new Coll{}};
std::vector<std::int64_t> recv_segments(comm_.World() + 1, 0);
std::vector<std::int32_t> recv(std::accumulate(sizes.cbegin(), sizes.cend(), 0));
auto s_recv = common::Span{recv.data(), recv.size()};
rc = pcoll->AllgatherV(comm_, common::EraseType(s_data),
common::Span{sizes.data(), sizes.size()},
common::Span{recv_segments.data(), recv_segments.size()},
common::EraseType(s_recv), AllgatherVAlgo::kBcast);
SafeColl(rc);
CheckV(s_recv);
// Test inplace
auto test_inplace = [&] (AllgatherVAlgo algo) {
std::fill_n(s_recv.data(), s_recv.size(), 0);
auto current = s_recv.subspan(recv_segments[comm_.Rank()],
recv_segments[comm_.Rank() + 1] - recv_segments[comm_.Rank()]);
std::copy_n(data.data(), data.size(), current.data());
rc = pcoll->AllgatherV(comm_, common::EraseType(current),
common::Span{sizes.data(), sizes.size()},
common::Span{recv_segments.data(), recv_segments.size()},
common::EraseType(s_recv), algo);
SafeColl(rc);
CheckV(s_recv);
};
test_inplace(AllgatherVAlgo::kBcast);
test_inplace(AllgatherVAlgo::kRing);
}
};
} // namespace
TEST_F(AllgatherTest, Basic) {
std::int32_t n_workers = std::min(7u, std::thread::hardware_concurrency());
TestDistributed(n_workers, [=](std::string host, std::int32_t port, std::chrono::seconds timeout,
std::int32_t r) {
Worker worker{host, port, timeout, n_workers, r};
worker.Run();
});
}
TEST_F(AllgatherTest, VBasic) {
std::int32_t n_workers = std::min(7u, std::thread::hardware_concurrency());
TestDistributed(n_workers, [=](std::string host, std::int32_t port, std::chrono::seconds timeout,
std::int32_t r) {
Worker worker{host, port, timeout, n_workers, r};
worker.TestVBasic();
});
}
TEST_F(AllgatherTest, VRing) {
std::int32_t n_workers = std::min(7u, std::thread::hardware_concurrency());
TestDistributed(n_workers, [=](std::string host, std::int32_t port, std::chrono::seconds timeout,
std::int32_t r) {
Worker worker{host, port, timeout, n_workers, r};
worker.TestVRing();
});
}
TEST_F(AllgatherTest, VAlgo) {
std::int32_t n_workers = std::min(7u, std::thread::hardware_concurrency());
TestDistributed(n_workers, [=](std::string host, std::int32_t port, std::chrono::seconds timeout,
std::int32_t r) {
Worker worker{host, port, timeout, n_workers, r};
worker.TestVAlgo();
});
}
TEST(VectorAllgatherV, Basic) {
std::int32_t n_workers{3};
TestDistributedGlobal(n_workers, []() {
auto n_workers = collective::GetWorldSize();
ASSERT_EQ(n_workers, 3);
auto rank = collective::GetRank();
// Construct input that has different length for each worker.
std::vector<std::vector<char>> inputs;
for (std::int32_t i = 0; i < rank + 1; ++i) {
std::vector<char> in;
for (std::int32_t j = 0; j < rank + 1; ++j) {
in.push_back(static_cast<char>(j));
}
inputs.emplace_back(std::move(in));
}
Context ctx;
auto outputs = VectorAllgatherV(&ctx, inputs);
ASSERT_EQ(outputs.size(), (1 + n_workers) * n_workers / 2);
auto const& res = outputs;
for (std::int32_t i = 0; i < n_workers; ++i) {
std::int32_t k = 0;
for (auto v : res[i]) {
ASSERT_EQ(v, k++);
}
}
});
}
} // namespace xgboost::collective
|
