root / man / man3 / HPL_rollT.3 @ 1
Historique | Voir | Annoter | Télécharger (2,36 ko)
| 1 |
.TH HPL_rollT 3 "September 10, 2008" "HPL 2.0" "HPL Library Functions" |
|---|---|
| 2 |
.SH NAME |
| 3 |
HPL_rollT \- Roll U and forward the column panel. |
| 4 |
.SH SYNOPSIS |
| 5 |
\fB\&#include "hpl.h"\fR |
| 6 |
|
| 7 |
\fB\&void\fR |
| 8 |
\fB\&HPL_rollT(\fR |
| 9 |
\fB\&HPL_T_panel *\fR |
| 10 |
\fI\&PBCST\fR, |
| 11 |
\fB\&int *\fR |
| 12 |
\fI\&IFLAG\fR, |
| 13 |
\fB\&HPL_T_panel *\fR |
| 14 |
\fI\&PANEL\fR, |
| 15 |
\fB\&const int\fR |
| 16 |
\fI\&N\fR, |
| 17 |
\fB\&double *\fR |
| 18 |
\fI\&U\fR, |
| 19 |
\fB\&const int\fR |
| 20 |
\fI\&LDU\fR, |
| 21 |
\fB\&const int *\fR |
| 22 |
\fI\&IPLEN\fR, |
| 23 |
\fB\&const int *\fR |
| 24 |
\fI\&IPMAP\fR, |
| 25 |
\fB\&const int *\fR |
| 26 |
\fI\&IPMAPM1\fR |
| 27 |
\fB\&);\fR |
| 28 |
.SH DESCRIPTION |
| 29 |
\fB\&HPL_rollT\fR |
| 30 |
rolls the local arrays containing the local pieces of U, so |
| 31 |
that on exit to this function U is replicated in every process row. |
| 32 |
In addition, this function probe for the presence of the column panel |
| 33 |
and forwards it when available. |
| 34 |
.SH ARGUMENTS |
| 35 |
.TP 8 |
| 36 |
PBCST (local input/output) HPL_T_panel * |
| 37 |
On entry, PBCST points to the data structure containing the |
| 38 |
panel (to be broadcast) information. |
| 39 |
.TP 8 |
| 40 |
IFLAG (local input/output) int * |
| 41 |
On entry, IFLAG indicates whether or not the broadcast has |
| 42 |
already been completed. If not, probing will occur, and the |
| 43 |
outcome will be contained in IFLAG on exit. |
| 44 |
.TP 8 |
| 45 |
PANEL (local input/output) HPL_T_panel * |
| 46 |
On entry, PANEL points to the data structure containing the |
| 47 |
panel (to be rolled) information. |
| 48 |
.TP 8 |
| 49 |
N (local input) const int |
| 50 |
On entry, N specifies the local number of rows of U. N must |
| 51 |
be at least zero. |
| 52 |
.TP 8 |
| 53 |
U (local input/output) double * |
| 54 |
On entry, U is an array of dimension (LDU,*) containing the |
| 55 |
local pieces of U in each process row. |
| 56 |
.TP 8 |
| 57 |
LDU (local input) const int |
| 58 |
On entry, LDU specifies the local leading dimension of U. LDU |
| 59 |
should be at least MAX(1,N). |
| 60 |
.TP 8 |
| 61 |
IPLEN (global input) const int * |
| 62 |
On entry, IPLEN is an array of dimension NPROW+1. This array |
| 63 |
is such that IPLEN[i+1] - IPLEN[i] is the number of rows of U |
| 64 |
in each process row. |
| 65 |
.TP 8 |
| 66 |
IPMAP (global input) const int * |
| 67 |
On entry, IMAP is an array of dimension NPROW. This array |
| 68 |
contains the logarithmic mapping of the processes. In other |
| 69 |
words, IMAP[myrow] is the absolute coordinate of the sorted |
| 70 |
process. |
| 71 |
.TP 8 |
| 72 |
IPMAPM1 (global input) const int * |
| 73 |
On entry, IMAPM1 is an array of dimension NPROW. This array |
| 74 |
contains the inverse of the logarithmic mapping contained in |
| 75 |
IMAP: For i in [0.. NPROW) IMAPM1[IMAP[i]] = i. |
| 76 |
.SH SEE ALSO |
| 77 |
.BR HPL_pdlaswp01T \ (3). |