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75f273a5
Commit
75f273a5
authored
Aug 25, 2014
by
Jonathan Jenkins
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added random 'seeding' capabilities to codes-mapping setup
parent
f9ee1142
Changes
2
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2 changed files
with
29 additions
and
1 deletion
+29
-1
codes_mapping.h
codes/codes_mapping.h
+8
-0
codes_mapping.c
src/util/codes_mapping.c
+21
-1
No files found.
codes/codes_mapping.h
View file @
75f273a5
...
...
@@ -21,6 +21,14 @@ tw_peid codes_mapping( tw_lpid gid);
/* loads the configuration file and sets up the number of LPs on each PE. */
void
codes_mapping_setup
(
void
);
/* set up lps with an RNG offset
*
* NOTE: manual seeding is discouraged by the ROSS folks, who instead suggest to
* set the number of RNGs each LP will "skip". offset here is a multiplier by
* the global number of LPs
*/
void
codes_mapping_setup_with_seed_offset
(
int
offset
);
/*Takes the group name and returns the number of repetitions in the group */
int
codes_mapping_get_group_reps
(
const
char
*
group_name
);
...
...
src/util/codes_mapping.c
View file @
75f273a5
...
...
@@ -436,16 +436,18 @@ static tw_lp * codes_mapping_to_lp( tw_lpid lpid)
}
/* This function loads the configuration file and sets up the number of LPs on each PE */
void
codes_mapping_setup
(
)
void
codes_mapping_setup
_with_seed_offset
(
int
offset
)
{
int
grp
,
lpt
,
message_size
;
int
pes
=
tw_nnodes
();
lps_per_pe_floor
=
0
;
for
(
grp
=
0
;
grp
<
lpconf
.
lpgroups_count
;
grp
++
)
{
for
(
lpt
=
0
;
lpt
<
lpconf
.
lpgroups
[
grp
].
lptypes_count
;
lpt
++
)
lps_per_pe_floor
+=
(
lpconf
.
lpgroups
[
grp
].
lptypes
[
lpt
].
count
*
lpconf
.
lpgroups
[
grp
].
repetitions
);
}
tw_lpid
global_nlps
=
lps_per_pe_floor
;
lps_leftover
=
lps_per_pe_floor
%
pes
;
lps_per_pe_floor
/=
pes
;
//printf("\n LPs for this PE are %d reps %d ", lps_per_pe_floor, lpconf.lpgroups[grp].repetitions);
...
...
@@ -468,6 +470,24 @@ void codes_mapping_setup()
printf
(
"
\n
Warning: ross message size not defined, resetting it to %d"
,
message_size
);
}
tw_define_lps
(
codes_mapping_get_lps_for_pe
(),
message_size
,
0
);
// use a similar computation to codes_mapping_init to compute the lpids and
// offsets to use in tw_rand_initial_seed
// an "offset" of 0 reverts to default RNG seeding behavior - see
// ross/rand-clcg4.c for the specific computation
// an "offset" < 0 is ignored
if
(
offset
>
0
){
for
(
tw_lpid
l
=
0
;
l
<
g_tw_nlp
;
l
++
){
for
(
int
i
=
0
;
i
<
g_tw_nRNG_per_lp
;
i
++
){
tw_rand_initial_seed
(
&
g_tw_lp
[
l
]
->
rng
[
i
],
(
g_tw_lp
[
l
]
->
gid
+
global_nlps
*
offset
)
*
g_tw_rng_max
+
i
);
}
}
}
}
void
codes_mapping_setup
(){
codes_mapping_setup_with_seed_offset
(
0
);
}
/* given the group and LP type name, return the annotation (or NULL) */
...
...
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