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Kirill Terekhov
INMOST
Commits
73080371
Commit
73080371
authored
Jan 22, 2015
by
Kirill Terekhov
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Internal solver residual norm
Now internal solver uses ||Ax-b||/||b|| instead of ||Ax-b||.
parent
d37628da
Changes
1
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1 changed file
with
9 additions
and
7 deletions
+9
-7
solver_bcgsl.hpp
solver_bcgsl.hpp
+9
-7
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solver_bcgsl.hpp
View file @
73080371
...
...
@@ -155,7 +155,7 @@ namespace INMOST
assert
(
isInitialized
());
INMOST_DATA_ENUM_TYPE
vbeg
,
vend
,
vlocbeg
,
vlocend
;
INMOST_DATA_REAL_TYPE
rho0
=
1
,
rho1
,
alpha
=
0
,
beta
,
omega
=
1
,
eta
;
INMOST_DATA_REAL_TYPE
resid0
,
resid
,
temp
[
2
];
INMOST_DATA_REAL_TYPE
resid0
,
resid
,
rhs_norm
,
temp
[
2
];
iters
=
0
;
info
->
PrepareVector
(
SOL
);
info
->
PrepareVector
(
RHS
);
...
...
@@ -165,6 +165,8 @@ namespace INMOST
if
(
prec
!=
NULL
)
prec
->
ReplaceRHS
(
RHS
);
info
->
GetLocalRegion
(
info
->
GetRank
(),
vlocbeg
,
vlocend
);
info
->
GetVectorRegion
(
vbeg
,
vend
);
rhs_norm
=
info
->
ScalarProd
(
RHS
,
RHS
,
vlocbeg
,
vlocend
);
//r[0] = b
std
::
copy
(
RHS
.
Begin
(),
RHS
.
End
(),
r
[
0
].
Begin
());
{
...
...
@@ -179,7 +181,7 @@ namespace INMOST
resid
=
info
->
ScalarProd
(
r
[
0
],
r
[
0
],
vlocbeg
,
vlocend
);
//resid = dot(r[0],r[0])
for
(
INMOST_DATA_ENUM_TYPE
k
=
vbeg
;
k
!=
vend
;
k
++
)
// r_tilde = r[0] / dot(r[0],r[0])
r_tilde
[
k
]
/=
resid
;
last_resid
=
resid
=
resid0
=
sqrt
(
resid
);
//resid = sqrt(dot(r[0],r[0])
last_resid
=
resid
=
resid0
=
sqrt
(
resid
/
rhs_norm
);
//resid = sqrt(dot(r[0],r[0])
last_it
=
0
;
#if defined(REPORT_RESIDUAL)
if
(
info
->
GetRank
()
==
0
)
...
...
@@ -187,7 +189,7 @@ namespace INMOST
//std::cout << "iter " << last_it << " residual " << resid << std::endl;
//std::cout << "iter " << last_it << " resid " << resid << "\r";
//printf("iter %3d resid %12g | %12g relative %12g | %12g\r", last_it, resid, atol, resid / resid0, rtol);
printf
(
"iter %3d resid %12g | %g
\
r
"
,
last_it
,
resid
,
atol
);
printf
(
"iter %3d resid %12g | %g
\
n
"
,
last_it
,
resid
,
atol
);
fflush
(
stdout
);
}
#endif
...
...
@@ -237,8 +239,8 @@ namespace INMOST
r
[
i
][
k
]
-=
alpha
*
u
[
i
+
1
][
k
];
resid
=
info
->
ScalarProd
(
r
[
j
],
r
[
j
],
vlocbeg
,
vlocend
);
// resid = dot(r[j],r[j])
resid
=
sqrt
(
resid
);
// resid = sqrt(dot(r[j],r[j]))
resid
=
info
->
ScalarProd
(
r
[
0
],
r
[
0
],
vlocbeg
,
vlocend
);
// resid = dot(r[j],r[j])
resid
=
sqrt
(
resid
/
rhs_norm
);
// resid = sqrt(dot(r[j],r[j]))
if
(
resid
<
atol
||
resid
<
rtol
*
resid0
)
{
...
...
@@ -309,7 +311,7 @@ namespace INMOST
last_it
=
i
+
1
;
{
resid
=
info
->
ScalarProd
(
r
[
0
],
r
[
0
],
vlocbeg
,
vlocend
);
resid
=
sqrt
(
resid
);
resid
=
sqrt
(
resid
/
rhs_norm
);
}
tt
=
Timer
()
-
tt
;
#if defined(REPORT_RESIDUAL)
...
...
@@ -318,7 +320,7 @@ namespace INMOST
//std::cout << "iter " << last_it << " residual " << resid << " time " << tt << " matvec " << ts*0.5/l << " precond " << tp*0.5/l << std::endl;
//std::cout << "iter " << last_it << " resid " << resid << "\r";
//printf("iter %3d resid %12g | %12g relative %12g | %12g\r", last_it, resid, atol, resid / resid0, rtol);
printf
(
"iter %3d resid %12g | %g
\
r
"
,
last_it
,
resid
,
atol
);
printf
(
"iter %3d resid %12g | %g
\
n
"
,
last_it
,
resid
,
atol
);
fflush
(
stdout
);
}
#endif
...
...
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