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SWIFT
SWIFTsim
Commits
150aed37
Commit
150aed37
authored
5 years ago
by
Matthieu Schaller
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Do the cell unpacking in parallel by having one thread in the threapool per request/proxy
parent
0883c5a2
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src/proxy.c
+40
-12
40 additions, 12 deletions
src/proxy.c
with
40 additions
and
12 deletions
src/proxy.c
+
40
−
12
View file @
150aed37
...
...
@@ -323,6 +323,40 @@ void proxy_cells_exchange_first_mapper(void *map_data, int num_elements,
}
}
struct
unpack_mapper_data
{
struct
space
*
s
;
const
int
with_gravity
;
MPI_Request
*
reqs_in
;
struct
proxy
*
proxies
;
};
void
proxy_cells_wait_and_unpack_mapper
(
void
*
map_data
,
int
num_elements
,
void
*
extra_data
)
{
MPI_Request
*
reqs
=
(
MPI_Request
*
)
map_data
;
struct
unpack_mapper_data
*
data
=
(
struct
unpack_mapper_data
*
)
extra_data
;
struct
space
*
s
=
data
->
s
;
const
int
with_gravity
=
data
->
with_gravity
;
MPI_Request
*
reqs_in
=
data
->
reqs_in
;
struct
proxy
*
proxies
=
data
->
proxies
;
for
(
int
k
=
0
;
k
<
num_elements
;
++
k
)
{
/* Wait for the data to arrive */
MPI_Status
status
;
if
(
MPI_Wait
(
&
reqs
[
k
],
&
status
)
!=
MPI_SUCCESS
)
error
(
"MPI_Wait failed!"
);
const
int
i
=
&
reqs
[
k
]
-
reqs_in
;
/* Un-pack the cells received in this proxy */
int
count
=
0
;
for
(
int
j
=
0
;
j
<
proxies
[
i
].
nr_cells_in
;
j
++
)
count
+=
cell_unpack
(
&
proxies
[
i
].
pcells_in
[
count
],
proxies
[
i
].
cells_in
[
j
],
s
,
with_gravity
);
}
}
#endif // WITH_MPI
/**
...
...
@@ -417,18 +451,12 @@ void proxy_cells_exchange(struct proxy *proxies, int num_proxies,
tic2
=
getticks
();
/* Wait for each pcell array to come in from the proxies. */
for
(
int
k
=
0
;
k
<
num_proxies
;
k
++
)
{
int
pid
=
MPI_UNDEFINED
;
MPI_Status
status
;
if
(
MPI_Waitany
(
num_proxies
,
reqs_in
,
&
pid
,
&
status
)
!=
MPI_SUCCESS
||
pid
==
MPI_UNDEFINED
)
error
(
"MPI_Waitany failed."
);
// message( "cell data from proxy %i has arrived." , pid );
for
(
int
count
=
0
,
j
=
0
;
j
<
proxies
[
pid
].
nr_cells_in
;
j
++
)
count
+=
cell_unpack
(
&
proxies
[
pid
].
pcells_in
[
count
],
proxies
[
pid
].
cells_in
[
j
],
s
,
with_gravity
);
}
/* Wait for each pcell array to come in from the proxies
* and unpack the cells. */
struct
unpack_mapper_data
unpack_data
=
{
s
,
with_gravity
,
reqs_in
,
proxies
};
threadpool_map
(
&
s
->
e
->
threadpool
,
proxy_cells_wait_and_unpack_mapper
,
reqs_in
,
num_proxies
,
sizeof
(
MPI_Request
),
/*chunk_size=*/
1
,
/*extra_data=*/
&
unpack_data
);
if
(
s
->
e
->
verbose
)
message
(
"Un-packing cells took %.3f %s."
,
...
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