ScaLAPACK 2.1  2.1
ScaLAPACK: Scalable Linear Algebra PACKage
pshrdinfo.f
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1  SUBROUTINE pshrdinfo( SUMMRY, NOUT, NMAT, NVAL, NVLO, NVHI,
2  $ LDNVAL, NNB, NBVAL, LDNBVAL, NGRIDS, PVAL,
3  $ LDPVAL, QVAL, LDQVAL, THRESH, WORK, IAM,
4  $ NPROCS )
5 *
6 * -- ScaLAPACK routine (version 1.7) --
7 * University of Tennessee, Knoxville, Oak Ridge National Laboratory,
8 * and University of California, Berkeley.
9 * May 1, 1997
10 *
11 * .. Scalar Arguments ..
12  INTEGER IAM, LDNBVAL, LDNVAL, LDPVAL, LDQVAL,
13  $ NGRIDS, NMAT, NNB, NOUT, NPROCS
14  REAL THRESH
15 * ..
16 * .. Array Arguments ..
17  CHARACTER*( * ) SUMMRY
18  INTEGER NBVAL( LDNBVAL ), NVAL( LDNVAL ),
19  $ NVHI( LDNVAL ), NVLO( LDNVAL ),
20  $ pval( ldpval ), qval( ldqval ), work( * )
21 * ..
22 *
23 * Purpose
24 * =======
25 *
26 * PSHRDINFO get the needed startup information for the Hessenberg
27 * reduction tests and transmits it to all processes.
28 *
29 * Arguments
30 * =========
31 *
32 * SUMMRY (global output) CHARACTER*(*)
33 * Name of output (summary) file (if any). Only defined for
34 * process 0.
35 *
36 * NOUT (global output) INTEGER
37 * The unit number for output file. NOUT = 6, output to screen,
38 * NOUT = 0, output to stderr. Only defined for process 0.
39 *
40 * NMAT (global output) INTEGER
41 * The number of different values that can be used for
42 * N, IHI & ILO.
43 *
44 * NVAL (global output) INTEGER array, dimension (LDNVAL)
45 * The values of N (number of rows & columns in matrix).
46 *
47 * NVLO (global output) INTEGER array, dimension (LDNVAL)
48 * The values of ILO.
49 *
50 * NVHI (global output) INTEGER array, dimension (LDNVAL)
51 * The values of IHI.
52 *
53 * LDNVAL (global input) INTEGER
54 * The maximum number of different values that can be used for
55 * N, ILO and IHI. LDNVAL >= NMAT.
56 *
57 * NNB (global output) INTEGER
58 * The number of different values that can be used for NB.
59 *
60 * NBVAL (global output) INTEGER array, dimension (LDNBVAL)
61 * The values of NB (blocksize) to run the code with.
62 *
63 * LDNBVAL (global input) INTEGER
64 * The maximum number of different values that can be used for
65 * NB, LDNBVAL >= NNB.
66 *
67 * NGRIDS (global output) INTEGER
68 * The number of different values that can be used for P & Q.
69 *
70 * PVAL (global output) INTEGER array, dimension (LDPVAL)
71 * The values of P (number of process rows) to run the code
72 * with.
73 *
74 * LDPVAL (global input) INTEGER
75 * The maximum number of different values that can be used for
76 * P, LDPVAL >= NGRIDS.
77 *
78 * QVAL (global output) INTEGER array, dimension (LDQVAL)
79 * The values of Q (number of process columns) to run the code
80 * with.
81 *
82 * LDQVAL (global input) INTEGER
83 * The maximum number of different values that can be used for
84 * Q, LDQVAL >= NGRIDS.
85 *
86 * THRESH (global output) REAL
87 * Indicates what error checks shall be run and printed out:
88 * = 0 : Perform no error checking
89 * > 0 : report all residuals greater than THRESH.
90 *
91 * WORK (local workspace) INTEGER array, dimension >=
92 * 3*LDNVAL+LDNBVAL+2*LDPVAL. Used to pack all input arrays
93 * in order to send info in one message.
94 *
95 * IAM (local input) INTEGER
96 * My process number.
97 *
98 * NPROCS (global input) INTEGER
99 * The total number of processes.
100 *
101 * Note
102 * ====
103 *
104 * For packing the information we assumed that the length in bytes of an
105 * integer is equal to the length in bytes of a real single precision.
106 *
107 * =====================================================================
108 *
109 * .. Parameters ..
110  INTEGER BLOCK_CYCLIC_2D, CSRC_, CTXT_, DLEN_, DTYPE_,
111  $ LLD_, MB_, M_, NB_, N_, RSRC_
112  PARAMETER ( BLOCK_CYCLIC_2D = 1, dlen_ = 9, dtype_ = 1,
113  $ ctxt_ = 2, m_ = 3, n_ = 4, mb_ = 5, nb_ = 6,
114  $ rsrc_ = 7, csrc_ = 8, lld_ = 9 )
115  INTEGER NIN
116  PARAMETER ( NIN = 11 )
117 * ..
118 * .. Local Scalars ..
119  CHARACTER*79 USRINFO
120  INTEGER I, ICTXT
121  REAL EPS
122 * ..
123 * .. External Subroutines ..
124  EXTERNAL blacs_abort, blacs_get, blacs_gridexit,
125  $ blacs_gridinit, blacs_setup, icopy, igebr2d,
126  $ igebs2d, sgebr2d, sgebs2d
127 * ..
128 * .. External Functions ..
129  REAL PSLAMCH
130  EXTERNAL PSLAMCH
131 * ..
132 * .. Intrinsic Functions ..
133  INTRINSIC max, min
134 * ..
135 * .. Executable Statements ..
136 *
137 * Process 0 reads the input data, broadcasts to other processes and
138 * writes needed information to NOUT
139 *
140  IF( iam.EQ.0 ) THEN
141 *
142 * Open file and skip data file header
143 *
144  OPEN( unit = nin, file = 'HRD.dat', status = 'OLD' )
145  READ( nin, fmt = * )summry
146  summry = ' '
147 *
148 * Read in user-supplied info about machine type, compiler, etc.
149 *
150  READ( nin, fmt = * ) usrinfo
151 *
152 * Read name and unit number for summary output file
153 *
154  READ( nin, fmt = * ) summry
155  READ( nin, fmt = * ) nout
156  IF( nout.NE.0 .AND. nout.NE.6 )
157  $ OPEN( unit = nout, file = summry, status = 'UNKNOWN' )
158 *
159 * Read and check the parameter values for the tests.
160 *
161 * Get number of matrices
162 *
163  READ( nin, fmt = * ) nmat
164  IF( nmat.LT.1. .OR. nmat.GT.ldnval ) THEN
165  WRITE( nout, fmt = 9997 ) 'N', ldnval
166  GO TO 20
167  END IF
168 *
169 * Get values of N, ILO, IHI
170 *
171  READ( nin, fmt = * ) ( nval( i ), i = 1, nmat )
172  READ( nin, fmt = * ) ( nvlo( i ), i = 1, nmat )
173  READ( nin, fmt = * ) ( nvhi( i ), i = 1, nmat )
174 *
175 * Get values of NB
176 *
177  READ( nin, fmt = * ) nnb
178  IF( nnb.LT.1 .OR. nnb.GT.ldnbval ) THEN
179  WRITE( nout, fmt = 9997 ) 'NB', ldnbval
180  GO TO 20
181  END IF
182  READ( nin, fmt = * ) ( nbval( i ), i = 1, nnb )
183 *
184 * Get number of grids
185 *
186  READ( nin, fmt = * ) ngrids
187  IF( ngrids.LT.1 .OR. ngrids.GT.ldpval ) THEN
188  WRITE( nout, fmt = 9997 ) 'Grids', ldpval
189  GO TO 20
190  ELSE IF( ngrids.GT.ldqval ) THEN
191  WRITE( nout, fmt = 9997 ) 'Grids', ldqval
192  GO TO 20
193  END IF
194 *
195 * Get values of P and Q
196 *
197  READ( nin, fmt = * ) ( pval( i ), i = 1, ngrids )
198  READ( nin, fmt = * ) ( qval( i ), i = 1, ngrids )
199 *
200 * Get level of checking
201 *
202  READ( nin, fmt = * ) thresh
203 *
204 * Close input file
205 *
206  CLOSE( nin )
207 *
208 * For pvm only: if virtual machine not set up, allocate it and
209 * spawn the correct number of processes.
210 *
211  IF( nprocs.LT.1 ) THEN
212  nprocs = 0
213  DO 10 i = 1, ngrids
214  nprocs = max( nprocs, pval( i )*qval( i ) )
215  10 CONTINUE
216  CALL blacs_setup( iam, nprocs )
217  END IF
218 *
219 * Temporarily define blacs grid to include all processes so
220 * information can be broadcast to all processes
221 *
222  CALL blacs_get( -1, 0, ictxt )
223  CALL blacs_gridinit( ictxt, 'Row-major', 1, nprocs )
224 *
225 * Compute machine epsilon
226 *
227  eps = pslamch( ictxt, 'eps' )
228 *
229 * Pack information arrays and broadcast
230 *
231  CALL sgebs2d( ictxt, 'All', ' ', 1, 1, thresh, 1 )
232 *
233  work( 1 ) = nmat
234  work( 2 ) = nnb
235  work( 3 ) = ngrids
236  CALL igebs2d( ictxt, 'All', ' ', 1, 3, work, 1 )
237 *
238  i = 1
239  CALL icopy( nmat, nval, 1, work( i ), 1 )
240  i = i + nmat
241  CALL icopy( nmat, nvlo, 1, work( i ), 1 )
242  i = i + nmat
243  CALL icopy( nmat, nvhi, 1, work( i ), 1 )
244  i = i + nmat
245  CALL icopy( nnb, nbval, 1, work( i ), 1 )
246  i = i + nnb
247  CALL icopy( ngrids, pval, 1, work( i ), 1 )
248  i = i + ngrids
249  CALL icopy( ngrids, qval, 1, work( i ), 1 )
250  i = i + ngrids -1
251  CALL igebs2d( ictxt, 'All', ' ', 1, i, work, 1 )
252 *
253 * regurgitate input
254 *
255  WRITE( nout, fmt = 9999 )
256  $ 'ScaLAPACK Reduction routine to Hessenberg form.'
257  WRITE( nout, fmt = 9999 ) usrinfo
258  WRITE( nout, fmt = * )
259  WRITE( nout, fmt = 9999 )
260  $ 'Tests of the parallel '//
261  $ 'real single precision Hessenberg '
262  WRITE( nout, fmt = 9999 ) 'reduction routines.'
263  WRITE( nout, fmt = 9999 )
264  $ 'The following scaled residual '//
265  $ 'checks will be computed:'
266  WRITE( nout, fmt = 9999 )
267  $ ' ||A - Q H Q''|| / (||A|| * eps * N)'
268  WRITE( nout, fmt = 9999 )
269  $ 'The matrix A is randomly '//
270  $ 'generated for each test.'
271  WRITE( nout, fmt = * )
272  WRITE( nout, fmt = 9999 )
273  $ 'An explanation of the input/output '//
274  $ 'parameters follows:'
275  WRITE( nout, fmt = 9999 )
276  $ 'TIME : Indicates whether WALL or '//
277  $ 'CPU time was used.'
278  WRITE( nout, fmt = 9999 )
279  $ 'N : The number of rows and columns '//
280  $ 'of the matrix A.'
281  WRITE( nout, fmt = 9999 )
282  $ 'NB : The size of the square blocks'//
283  $ ' the matrix A is split into.'
284  WRITE( nout, fmt = 9999 )
285  $ ' on to the next column of processes.'
286  WRITE( nout, fmt = 9999 )
287  $ 'P : The number of process rows.'
288  WRITE( nout, fmt = 9999 )
289  $ 'Q : The number of process columns.'
290  WRITE( nout, fmt = 9999 )
291  $ 'HRD time : Time in seconds to compute HRD '
292  WRITE( nout, fmt = 9999 )
293  $ 'MFLOPS : Rate of execution for HRD ' //
294  $ 'reduction.'
295  WRITE( nout, fmt = * )
296  WRITE( nout, fmt = 9999 )
297  $ 'The following parameter values will be used:'
298  WRITE( nout, fmt = 9995 )
299  $ 'N ', ( nval( i ), i = 1, min( nmat, 10 ) )
300  IF( nmat.GT.10 )
301  $ WRITE( nout, fmt = 9994 ) ( nval( i ), i = 11, nmat )
302  WRITE( nout, fmt = 9995 )
303  $ 'ILO ', ( nvlo( i ), i = 1, min( nmat, 10 ) )
304  IF( nmat.GT.10 )
305  $ WRITE( nout, fmt = 9994 ) ( nvlo( i ), i = 11, nmat )
306  WRITE( nout, fmt = 9995 )
307  $ 'IHI ', ( nvhi( i ), i = 1, min( nmat, 10 ) )
308  IF( nmat.GT.10 )
309  $ WRITE( nout, fmt = 9994 ) ( nvhi( i ), i = 11, nmat )
310  WRITE( nout, fmt = 9995 )
311  $ 'NB ', ( nbval( i ), i = 1, min( nnb, 10 ) )
312  IF( nnb.GT.10 )
313  $ WRITE( nout, fmt = 9994 ) ( nbval( i ), i = 11, nnb )
314  WRITE( nout, fmt = 9995 )
315  $ 'P ', ( pval( i ), i = 1, min( ngrids, 10 ) )
316  IF( ngrids.GT.10 )
317  $ WRITE( nout, fmt = 9994 ) ( pval( i ), i = 11, ngrids )
318  WRITE( nout, fmt = 9995 )
319  $ 'Q ', ( qval( i ), i = 1, min( ngrids, 10 ) )
320  IF( ngrids.GT.10 )
321  $ WRITE( nout, fmt = 9994 ) ( qval( i ), i = 11, ngrids )
322  WRITE( nout, fmt = * )
323  WRITE( nout, fmt = 9996 ) eps
324  WRITE( nout, fmt = 9993 ) thresh
325 *
326  ELSE
327 *
328 * If in pvm, must participate setting up virtual machine
329 *
330  IF( nprocs.LT.1 )
331  $ CALL blacs_setup( iam, nprocs )
332 *
333 * Temporarily define blacs grid to include all processes so
334 * all processes have needed startup information
335 *
336  CALL blacs_get( -1, 0, ictxt )
337  CALL blacs_gridinit( ictxt, 'Row-major', 1, nprocs )
338 *
339 * Compute machine epsilon
340 *
341  eps = pslamch( ictxt, 'eps' )
342 *
343  CALL sgebr2d( ictxt, 'All', ' ', 1, 1, thresh, 1, 0, 0 )
344  CALL igebr2d( ictxt, 'All', ' ', 1, 3, work, 1, 0, 0 )
345  nmat = work( 1 )
346  nnb = work( 2 )
347  ngrids = work( 3 )
348 *
349  i = 3*nmat + nnb + 2*ngrids
350  CALL igebr2d( ictxt, 'All', ' ', 1, i, work, 1, 0, 0 )
351 *
352  i = 1
353  CALL icopy( nmat, work( i ), 1, nval, 1 )
354  i = i + nmat
355  CALL icopy( nmat, work( i ), 1, nvlo, 1 )
356  i = i + nmat
357  CALL icopy( nmat, work( i ), 1, nvhi, 1 )
358  i = i + nmat
359  CALL icopy( nnb, work( i ), 1, nbval, 1 )
360  i = i + nnb
361  CALL icopy( ngrids, work( i ), 1, pval, 1 )
362  i = i + ngrids
363  CALL icopy( ngrids, work( i ), 1, qval, 1 )
364 *
365  END IF
366 *
367  CALL blacs_gridexit( ictxt )
368 *
369  RETURN
370 *
371  20 CONTINUE
372  WRITE( nout, fmt = 9998 )
373  CLOSE( nin )
374  IF( nout.NE.6 .AND. nout.NE.0 )
375  $ CLOSE( nout )
376  CALL blacs_abort( ictxt, 1 )
377 *
378  stop
379 *
380  9999 FORMAT( a )
381  9998 FORMAT( ' ILLEGAL INPUT IN FILE ', 40a, '. ABORTING RUN.' )
382  9997 FORMAT( ' NUMBER OF VALUES OF ', 5a,
383  $ ' IS LESS THAN 1 OR GREATER ', 'THAN ', i2 )
384  9996 FORMAT( 'Relative machine precision (eps) is taken to be ',
385  $ e18.6 )
386  9995 FORMAT( 2x, a5, ': ', 10i6 )
387  9994 FORMAT( ' ', 10i6 )
388  9993 FORMAT( 'Routines pass computational tests if scaled residual is',
389  $ ' less than ', g14.7 )
390 *
391 * End of PSHRDINFO
392 *
393  END
max
#define max(A, B)
Definition: pcgemr.c:180
pshrdinfo
subroutine pshrdinfo(SUMMRY, NOUT, NMAT, NVAL, NVLO, NVHI, LDNVAL, NNB, NBVAL, LDNBVAL, NGRIDS, PVAL, LDPVAL, QVAL, LDQVAL, THRESH, WORK, IAM, NPROCS)
Definition: pshrdinfo.f:5
icopy
subroutine icopy(N, SX, INCX, SY, INCY)
Definition: pblastst.f:1525
min
#define min(A, B)
Definition: pcgemr.c:181