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taskflow/unittests/test_subflows.cpp at mw-3.6.1 · ModuleWorks/taskflow · GitHub
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#
define
DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#
include
<
doctest.h
>
#
include
<
taskflow/taskflow.hpp
>
#
include
<
taskflow/algorithm/reduce.hpp
>
//
--------------------------------------------------------
//
Testcase: JoinedSubflow
//
--------------------------------------------------------
void
joined_subflow
(
unsigned
W) {
using
namespace
std
::literals::chrono_literals
;
SUBCASE
(
"
Trivial
"
) {
tf::Executor
executor
(W);
tf::Taskflow tf;
//
empty flow with future
tf::Task subflow3, subflow3_;
//
std::future<int> fu3, fu3_;
std::atomic<
int
> fu3v{
0
}, fu3v_{
0
};
//
empty flow
auto
subflow1 = tf.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
join
();
}).
name
(
"
subflow1
"
);
//
nested empty flow
auto
subflow2 = tf.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
emplace
( [&] (tf::Subflow& fb) {
fu3v++;
fb.
join
();
}).
name
(
"
subflow2_1_1
"
);
}).
name
(
"
subflow2_1
"
);
}).
name
(
"
subflow2
"
);
subflow3 = tf.
emplace
([&] (tf::Subflow& fb) {
REQUIRE
(fu3v ==
4
);
fu3v++;
fu3v_++;
subflow3_ = fb.
emplace
([&] (tf::Subflow& fb) {
REQUIRE
(fu3v_ ==
3
);
fu3v++;
fu3v_++;
//
return 200;
fb.
join
();
});
subflow3_.
name
(
"
subflow3_
"
);
//
hereafter we use 100us to avoid dangling reference ...
auto
s1 = fb.
emplace
([&] () {
fu3v_++;
fu3v++;
}).
name
(
"
s1
"
);
auto
s2 = fb.
emplace
([&] () {
fu3v_++;
fu3v++;
}).
name
(
"
s2
"
);
auto
s3 = fb.
emplace
([&] () {
fu3v++;
REQUIRE
(fu3v_ ==
4
);
}).
name
(
"
s3
"
);
s1.
precede
(subflow3_);
s2.
precede
(subflow3_);
subflow3_.
precede
(s3);
REQUIRE
(fu3v_ ==
1
);
//
return 100;
});
subflow3.
name
(
"
subflow3
"
);
//
empty flow to test future
auto
subflow4 = tf.
emplace
([&] () {
fu3v++;
}).
name
(
"
subflow4
"
);
subflow1.
precede
(subflow2);
subflow2.
precede
(subflow3);
subflow3.
precede
(subflow4);
executor.
run
(tf).
get
();
//
End of for loop
}
//
Mixed intra- and inter- operations
SUBCASE
(
"
Complex
"
) {
tf::Executor
executor
(W);
tf::Taskflow tf;
std::vector<
int
> data;
int
sum {
0
};
auto
A = tf.
emplace
([&data] () {
for
(
int
i=
0
; i<
10
; ++i) {
data.
push_back
(
1
);
}
});
std::atomic<
size_t
> count {
0
};
auto
B = tf.
emplace
([&count, &data, &sum](tf::Subflow& fb){
//
auto [src, tgt] = fb.reduce(data.begin(), data.end(), sum, std::plus<int>());
auto
task = fb.
reduce
(data.
begin
(), data.
end
(), sum, std::plus<
int
>());
fb.
emplace
([&sum] () {
REQUIRE
(sum ==
0
); }).
precede
(task);
task.
precede
(fb.
emplace
([&sum] () {
REQUIRE
(sum ==
10
); }));
for
(
size_t
i=
0
; i<
10
; i ++){
++count;
}
auto
n = fb.
emplace
([&count](tf::Subflow& fb){
REQUIRE
(count ==
20
);
++count;
auto
prev = fb.
emplace
([&count](){
REQUIRE
(count ==
21
);
++count;
});
for
(
size_t
i=
0
; i<
10
; i++){
auto
next = fb.
emplace
([&count, i](){
REQUIRE
(count ==
22
+i);
++count;
});
prev.
precede
(next);
prev = next;
}
});
for
(
size_t
i=
0
; i<
10
; i++){
fb.
emplace
([&count](){ ++count; }).
precede
(n);
}
});
A.
precede
(B);
executor.
run
(tf).
get
();
REQUIRE
(count ==
32
);
REQUIRE
(sum ==
10
);
}
}
TEST_CASE
(
"
JoinedSubflow.1thread
"
*
doctest::timeout
(
300
)){
joined_subflow
(
1
);
}
TEST_CASE
(
"
JoinedSubflow.2threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
2
);
}
TEST_CASE
(
"
JoinedSubflow.3threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
3
);
}
TEST_CASE
(
"
JoinedSubflow.4threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
4
);
}
TEST_CASE
(
"
JoinedSubflow.5threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
5
);
}
TEST_CASE
(
"
JoinedSubflow.6threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
6
);
}
TEST_CASE
(
"
JoinedSubflow.7threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
7
);
}
TEST_CASE
(
"
JoinedSubflow.8threads
"
*
doctest::timeout
(
300
)){
joined_subflow
(
8
);
}
//
--------------------------------------------------------
//
Testcase: DetachedSubflow
//
--------------------------------------------------------
void
detached_subflow
(
unsigned
W) {
using
namespace
std
::literals::chrono_literals
;
SUBCASE
(
"
Trivial
"
) {
tf::Executor
executor
(W);
tf::Taskflow tf;
//
empty flow with future
tf::Task subflow3, subflow3_;
std::atomic<
int
> fu3v{
0
}, fu3v_{
0
};
//
empty flow
auto
subflow1 = tf.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
detach
();
}).
name
(
"
subflow1
"
);
//
nested empty flow
auto
subflow2 = tf.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
emplace
([&] (tf::Subflow& fb) {
fu3v++;
fb.
emplace
( [&] (tf::Subflow& fb) {
fu3v++;
fb.
join
();
}).
name
(
"
subflow2_1_1
"
);
fb.
detach
();
}).
name
(
"
subflow2_1
"
);
fb.
detach
();
}).
name
(
"
subflow2
"
);
subflow3 = tf.
emplace
([&] (tf::Subflow& fb) {
REQUIRE
((fu3v >=
2
&& fu3v <=
4
));
fu3v++;
fu3v_++;
subflow3_ = fb.
emplace
([&] (tf::Subflow& fb) {
REQUIRE
(fu3v_ ==
3
);
fu3v++;
fu3v_++;
fb.
join
();
});
subflow3_.
name
(
"
subflow3_
"
);
//
hereafter we use 100us to avoid dangling reference ...
auto
s1 = fb.
emplace
([&] () {
fu3v_++;
fu3v++;
}).
name
(
"
s1
"
);
auto
s2 = fb.
emplace
([&] () {
fu3v_++;
fu3v++;
}).
name
(
"
s2
"
);
auto
s3 = fb.
emplace
([&] () {
fu3v++;
REQUIRE
(fu3v_ ==
4
);
}).
name
(
"
s3
"
);
s1.
precede
(subflow3_);
s2.
precede
(subflow3_);
subflow3_.
precede
(s3);
REQUIRE
(fu3v_ ==
1
);
fb.
detach
();
//
return 100;
});
subflow3.
name
(
"
subflow3
"
);
//
empty flow to test future
auto
subflow4 = tf.
emplace
([&] () {
REQUIRE
((fu3v >=
3
&& fu3v <=
9
));
fu3v++;
}).
name
(
"
subflow4
"
);
subflow1.
precede
(subflow2);
subflow2.
precede
(subflow3);
subflow3.
precede
(subflow4);
executor.
run
(tf).
get
();
REQUIRE
(fu3v ==
10
);
REQUIRE
(fu3v_ ==
4
);
}
}
TEST_CASE
(
"
DetachedSubflow.1thread
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
1
);
}
TEST_CASE
(
"
DetachedSubflow.2threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
2
);
}
TEST_CASE
(
"
DetachedSubflow.3threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
3
);
}
TEST_CASE
(
"
DetachedSubflow.4threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
4
);
}
TEST_CASE
(
"
DetachedSubflow.5threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
5
);
}
TEST_CASE
(
"
DetachedSubflow.6threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
6
);
}
TEST_CASE
(
"
DetachedSubflow.7threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
7
);
}
TEST_CASE
(
"
DetachedSubflow.8threads
"
*
doctest::timeout
(
300
)) {
detached_subflow
(
8
);
}
//
--------------------------------------------------------
//
Testcase: TreeSubflow
//
--------------------------------------------------------
void
detach_spawn
(
const
int
max_depth, std::atomic<
int
>& counter,
int
depth, tf::Subflow& subflow) {
if
(depth < max_depth) {
counter.
fetch_add
(
1
, std::memory_order_relaxed);
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
detach_spawn
(max_depth, counter, depth, subflow); }
);
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
detach_spawn
(max_depth, counter, depth, subflow); }
);
subflow.
detach
();
}
}
void
join_spawn
(
const
int
max_depth, std::atomic<
int
>& counter,
int
depth, tf::Subflow& subflow) {
if
(depth < max_depth) {
counter.
fetch_add
(
1
, std::memory_order_relaxed);
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
join_spawn
(max_depth, counter, depth, subflow); }
);
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
join_spawn
(max_depth, counter, depth, subflow); }
);
}
}
void
mix_spawn
(
const
int
max_depth, std::atomic<
int
>& counter,
int
depth, tf::Subflow& subflow
) {
if
(depth < max_depth) {
auto
ret = counter.
fetch_add
(
1
, std::memory_order_relaxed);
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
mix_spawn
(max_depth, counter, depth, subflow); }
).
name
(
std::string
(
"
left
"
) +
std::to_string
(ret%
2
));
subflow.
emplace
([&, max_depth, depth=depth+
1
](tf::Subflow& subflow){
mix_spawn
(max_depth, counter, depth, subflow); }
).
name
(
std::string
(
"
right
"
) +
std::to_string
(ret%
2
));
if
(ret %
2
) {
subflow.
detach
();
}
}
}
TEST_CASE
(
"
TreeSubflow
"
*
doctest::timeout
(
300
)) {
SUBCASE
(
"
AllDetach
"
) {
constexpr
int
max_depth {
10
};
for
(
int
W=
1
; W<=
4
; W++) {
std::atomic<
int
> counter {
0
};
tf::Taskflow tf;
tf.
emplace
([&](tf::Subflow& subflow){
detach_spawn
(max_depth, counter,
0
, subflow);
});
tf::Executor
executor
(W);
executor.
run
(tf).
get
();
REQUIRE
(counter == (
1
<<max_depth) -
1
);
}
}
SUBCASE
(
"
AllJoin
"
) {
constexpr
int
max_depth {
10
};
for
(
int
W=
1
; W<=
4
; W++) {
std::atomic<
int
> counter {
0
};
tf::Taskflow tf;
tf.
emplace
([&](tf::Subflow& subflow){
join_spawn
(max_depth, counter,
0
, subflow);
});
tf::Executor
executor
(W);
executor.
run
(tf).
get
();
REQUIRE
(counter == (
1
<<max_depth) -
1
);
}
}
SUBCASE
(
"
Mix
"
) {
constexpr
int
max_depth {
10
};
for
(
int
W=
1
; W<=
4
; W++) {
std::atomic<
int
> counter {
0
};
tf::Taskflow tf;
tf.
emplace
([&](tf::Subflow& subflow){
mix_spawn
(max_depth, counter,
0
, subflow);
}).
name
(
"
top task
"
);
tf::Executor
executor
(W);
executor.
run
(tf).
get
();
REQUIRE
(counter == (
1
<<max_depth) -
1
);
}
}
}
//
--------------------------------------------------------
//
Testcase: FibSubflow
//
--------------------------------------------------------
int
fibonacci_spawn
(
int
n, tf::Subflow& sbf) {
if
(n <
2
)
return
n;
int
res1, res2;
sbf.
emplace
([&res1, n] (tf::Subflow& sbf) { res1 =
fibonacci_spawn
(n -
1
, sbf); } );
sbf.
emplace
([&res2, n] (tf::Subflow& sbf) { res2 =
fibonacci_spawn
(n -
2
, sbf); } );
REQUIRE
(sbf.
joinable
() ==
true
);
sbf.
join
();
REQUIRE
(sbf.
joinable
() ==
false
);
return
res1 + res2;
}
void
fibonacci
(
size_t
W) {
int
N =
20
;
int
res = -
1
;
//
result
tf::Executor
executor
(W);
tf::Taskflow taskflow;
taskflow.
emplace
([&res, N] (tf::Subflow& sbf) {
res =
fibonacci_spawn
(N, sbf);
});
executor.
run
(taskflow).
wait
();
REQUIRE
(res ==
6765
);
}
TEST_CASE
(
"
FibSubflow.1thread
"
) {
fibonacci
(
1
);
}
TEST_CASE
(
"
FibSubflow.2threads
"
) {
fibonacci
(
2
);
}
TEST_CASE
(
"
FibSubflow.4threads
"
) {
fibonacci
(
4
);
}
TEST_CASE
(
"
FibSubflow.5threads
"
) {
fibonacci
(
5
);
}
TEST_CASE
(
"
FibSubflow.6threads
"
) {
fibonacci
(
6
);
}
TEST_CASE
(
"
FibSubflow.7threads
"
) {
fibonacci
(
7
);
}
TEST_CASE
(
"
FibSubflow.8threads
"
) {
fibonacci
(
8
);
}
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