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psblas3:
base/Makefile base/comm/psb_cgather.f90 base/comm/psb_chalo.f90 base/comm/psb_covrl.f90 base/comm/psb_dgather.f90 base/comm/psb_dhalo.f90 base/comm/psb_dovrl.f90 base/comm/psb_sgather.f90 base/comm/psb_shalo.f90 base/comm/psb_sovrl.f90 base/comm/psb_zgather.f90 base/comm/psb_zhalo.f90 base/comm/psb_zovrl.f90 base/internals/psi_cswapdata.F90 base/internals/psi_cswaptran.F90 base/internals/psi_dswapdata.F90 base/internals/psi_dswaptran.F90 base/internals/psi_idx_ins_cnv.f90 base/internals/psi_ovrl_restr.f90 base/internals/psi_ovrl_save.f90 base/internals/psi_ovrl_upd.f90 base/internals/psi_sswapdata.F90 base/internals/psi_sswaptran.F90 base/internals/psi_zswapdata.F90 base/internals/psi_zswaptran.F90 base/modules/Makefile base/modules/psb_base_mat_mod.f90 base/modules/psb_base_mod.f90 base/modules/psb_c_base_mat_mod.f90 base/modules/psb_c_base_vect_mod.f90 base/modules/psb_c_comm_mod.f90 base/modules/psb_c_csc_mat_mod.f90 base/modules/psb_c_csr_mat_mod.f90 base/modules/psb_c_linmap_mod.f90 base/modules/psb_c_mat_mod.f90 base/modules/psb_c_psblas_mod.f90 base/modules/psb_c_tools_mod.f90 base/modules/psb_c_vect_mod.f90 base/modules/psb_check_mod.f90 base/modules/psb_comm_mod.f90 base/modules/psb_const_mod.F90 base/modules/psb_d_base_mat_mod.f90 base/modules/psb_d_base_vect_mod.f90 base/modules/psb_d_comm_mod.f90 base/modules/psb_d_csc_mat_mod.f90 base/modules/psb_d_csr_mat_mod.f90 base/modules/psb_d_linmap_mod.f90 base/modules/psb_d_mat_mod.f90 base/modules/psb_d_psblas_mod.f90 base/modules/psb_d_tools_mod.f90 base/modules/psb_d_vect_mod.f90 base/modules/psb_error_impl.F90 base/modules/psb_error_mod.F90 base/modules/psb_i_comm_mod.f90 base/modules/psb_ip_reord_mod.f90 base/modules/psb_linmap_mod.f90 base/modules/psb_linmap_type_mod.f90 base/modules/psb_s_base_mat_mod.f90 base/modules/psb_s_base_vect_mod.f90 base/modules/psb_s_comm_mod.f90 base/modules/psb_s_csc_mat_mod.f90 base/modules/psb_s_csr_mat_mod.f90 base/modules/psb_s_linmap_mod.f90 base/modules/psb_s_mat_mod.f90 base/modules/psb_s_psblas_mod.f90 base/modules/psb_s_tools_mod.f90 base/modules/psb_s_vect_mod.f90 base/modules/psb_serial_mod.f90 base/modules/psb_vect_mod.f90 base/modules/psb_z_base_mat_mod.f90 base/modules/psb_z_base_vect_mod.f90 base/modules/psb_z_comm_mod.f90 base/modules/psb_z_csc_mat_mod.f90 base/modules/psb_z_csr_mat_mod.f90 base/modules/psb_z_linmap_mod.f90 base/modules/psb_z_mat_mod.f90 base/modules/psb_z_psblas_mod.f90 base/modules/psb_z_tools_mod.f90 base/modules/psb_z_vect_mod.f90 base/modules/psi_c_mod.f90 base/modules/psi_d_mod.f90 base/modules/psi_i_mod.f90 base/modules/psi_mod.f90 base/modules/psi_penv_mod.F90 base/modules/psi_s_mod.f90 base/modules/psi_z_mod.f90 base/psblas/psb_camax.f90 base/psblas/psb_casum.f90 base/psblas/psb_caxpby.f90 base/psblas/psb_cdot.f90 base/psblas/psb_cnrm2.f90 base/psblas/psb_cspmm.f90 base/psblas/psb_cspsm.f90 base/psblas/psb_damax.f90 base/psblas/psb_dasum.f90 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base/serial/impl/psb_s_coo_impl.f90 base/serial/impl/psb_s_csc_impl.f90 base/serial/impl/psb_s_csr_impl.f90 base/serial/impl/psb_s_mat_impl.F90 base/serial/impl/psb_z_base_mat_impl.f90 base/serial/impl/psb_z_coo_impl.f90 base/serial/impl/psb_z_csc_impl.f90 base/serial/impl/psb_z_csr_impl.f90 base/serial/impl/psb_z_mat_impl.F90 base/serial/psb_cgelp.f90 base/serial/psb_dgelp.f90 base/serial/psb_sgelp.f90 base/serial/psb_spdot_srtd.f90 base/serial/psb_zgelp.f90 base/tools/Makefile base/tools/psb_c_map.f90 base/tools/psb_callc.f90 base/tools/psb_casb.f90 base/tools/psb_cdins.f90 base/tools/psb_cfree.f90 base/tools/psb_cins.f90 base/tools/psb_d_map.f90 base/tools/psb_dallc.f90 base/tools/psb_dasb.f90 base/tools/psb_dcdbldext.F90 base/tools/psb_dfree.f90 base/tools/psb_dins.f90 base/tools/psb_dspalloc.f90 base/tools/psb_dspasb.f90 base/tools/psb_dspfree.f90 base/tools/psb_dsphalo.F90 base/tools/psb_dspins.f90 base/tools/psb_dsprn.f90 base/tools/psb_linmap.f90 base/tools/psb_map.f90 base/tools/psb_s_map.f90 base/tools/psb_sallc.f90 base/tools/psb_sasb.f90 base/tools/psb_sfree.f90 base/tools/psb_sins.f90 base/tools/psb_z_map.f90 base/tools/psb_zallc.f90 base/tools/psb_zasb.f90 base/tools/psb_zfree.f90 base/tools/psb_zins.f90 config/pac.m4 configure.ac configure docs/html/footnode.html docs/html/img1.png docs/html/img10.png docs/html/img100.png docs/html/img101.png docs/html/img102.png docs/html/img103.png docs/html/img104.png docs/html/img105.png docs/html/img106.png docs/html/img107.png docs/html/img108.png docs/html/img109.png docs/html/img11.png docs/html/img110.png docs/html/img111.png docs/html/img112.png docs/html/img113.png docs/html/img114.png docs/html/img115.png docs/html/img116.png docs/html/img117.png docs/html/img118.png docs/html/img119.png docs/html/img12.png docs/html/img120.png docs/html/img121.png docs/html/img122.png docs/html/img123.png docs/html/img124.png docs/html/img125.png docs/html/img126.png docs/html/img127.png docs/html/img128.png 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krylov/psb_crgmres.f90 krylov/psb_d_inner_krylov_mod.f90 krylov/psb_dbicg.f90 krylov/psb_dcg.F90 krylov/psb_dcgs.f90 krylov/psb_dcgstab.F90 krylov/psb_dcgstabl.f90 krylov/psb_dkrylov.f90 krylov/psb_drgmres.f90 krylov/psb_krylov_mod.f90 krylov/psb_s_inner_krylov_mod.f90 krylov/psb_sbicg.f90 krylov/psb_scg.F90 krylov/psb_scgs.f90 krylov/psb_scgstab.F90 krylov/psb_scgstabl.f90 krylov/psb_skrylov.f90 krylov/psb_srgmres.f90 krylov/psb_z_inner_krylov_mod.f90 krylov/psb_zbicg.f90 krylov/psb_zcg.F90 krylov/psb_zcgs.f90 krylov/psb_zcgstab.f90 krylov/psb_zcgstabl.f90 krylov/psb_zkrylov.f90 krylov/psb_zrgmres.f90 opt/Makefile opt/psb_c_rsb_mat_mod.F90 opt/psb_d_rsb_mat_mod.F90 opt/psb_s_rsb_mat_mod.F90 opt/psb_z_rsb_mat_mod.F90 opt/rsb_c_mod.f90 opt/rsb_d_mod.f90 opt/rsb_s_mod.f90 opt/rsb_z_mod.f90 prec/Makefile prec/psb_c_base_prec_mod.f90 prec/psb_c_bjacprec.f90 prec/psb_c_diagprec.f90 prec/psb_c_nullprec.f90 prec/psb_c_prec_type.f90 prec/psb_cprecbld.f90 prec/psb_d_base_prec_mod.f90 prec/psb_d_bjacprec.f90 prec/psb_d_diagprec.f90 prec/psb_d_nullprec.f90 prec/psb_d_prec_type.f90 prec/psb_dprecbld.f90 prec/psb_s_base_prec_mod.f90 prec/psb_s_bjacprec.f90 prec/psb_s_diagprec.f90 prec/psb_s_nullprec.f90 prec/psb_s_prec_type.f90 prec/psb_sprecbld.f90 prec/psb_z_base_prec_mod.f90 prec/psb_z_bjacprec.f90 prec/psb_z_diagprec.f90 prec/psb_z_nullprec.f90 prec/psb_z_prec_type.f90 prec/psb_zprecbld.f90 test/fileread/cf_sample.f90 test/fileread/df_sample.f90 test/fileread/runs/dfs.inp test/fileread/runs/sfs.inp test/fileread/sf_sample.f90 test/fileread/zf_sample.f90 test/kernel/d_file_spmv.f90 test/kernel/s_file_spmv.f90 test/newfmt/ppde.F90 test/newfmt/spde.f90 test/pargen/ppde.f90 test/pargen/runs/ppde.inp test/pargen/spde.f90 test/serial/Makefile test/serial/d_matgen.F90 test/serial/psb_d_czz_mat_mod.f90 util/Makefile util/psb_c_hbio_impl.f90 util/psb_c_mat_dist_impl.f90 util/psb_c_mmio_impl.f90 util/psb_c_renum_impl.F90 util/psb_d_hbio_impl.f90 util/psb_d_mat_dist_impl.f90 util/psb_d_mmio_impl.f90 util/psb_d_renum_impl.F90 util/psb_hbio_impl.f90 util/psb_mat_dist_mod.f90 util/psb_mmio_impl.f90 util/psb_renum_impl.F90 util/psb_renum_mod.f90 util/psb_s_hbio_impl.f90 util/psb_s_mat_dist_impl.f90 util/psb_s_mmio_impl.f90 util/psb_s_renum_impl.F90 util/psb_z_hbio_impl.f90 util/psb_z_mat_dist_impl.f90 util/psb_z_mmio_impl.f90 util/psb_z_renum_impl.F90 Merged vect-state branch. Now need to: 1. Update MLD 2. Fix documentation 3. Take out older Krylov interfaces.
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@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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<H2><A NAME="SECTION00081000000000000000">
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psb_init -- Initializes PSBLAS parallel environment</A>
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<H2><A NAME="SECTION000727000000000000000">
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Sorting utilities</A>
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</H2>
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<P>
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<FONT SIZE="+1"><B>psb_msort -- Sorting by the Merge-sort
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algorithm</B></FONT>
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<P>
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<FONT SIZE="+1"><B>psb_qsort -- Sorting by the Quicksort
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algorithm</B></FONT>
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<P>
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<FONT SIZE="+1"><B>psb_hsort -- Sorting by the Heapsort algorithm</B></FONT>
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<PRE>
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call psb_init(icontxt, np, basectxt, ids)
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call psb_msort(x,ix,dir,flag)
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call psb_qsort(x,ix,dir,flag)
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call psb_hsort(x,ix,dir,flag)
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</PRE>
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<P>
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This subroutine initializes the PSBLAS parallel environment, defining
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a virtual parallel machine.
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These serial routines sort a sequence <IMG
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SRC="img112.png"
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ALT="$X$"> into ascending or
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descending order. The argument meaning is identical for the three
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calls; the only difference is the algorithm used to accomplish the
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task (see Usage Notes below).
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Synchronous.
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>np</STRONG></DT>
|
||||
<DD>Number of processes in the PSBLAS virtual parallel machine.
|
||||
<DT><STRONG>x</STRONG></DT>
|
||||
<DD>The sequence to be sorted.
|
||||
<BR>
|
||||
Scope: <B>global</B>.
|
||||
Type:<B>required</B>.
|
||||
<BR>
|
||||
Type: <B>optional</B>.
|
||||
<BR>
|
||||
Intent: <B>in</B>.
|
||||
<BR>
|
||||
Specified as: an integer value. Default: use all available processes.
|
||||
Specified as: an integer, real or complex array of rank 1.
|
||||
</DD>
|
||||
<DT><STRONG>basectxt</STRONG></DT>
|
||||
<DD>the initial communication context. The new context
|
||||
will be defined from the processes participating in the initial one.
|
||||
<DT><STRONG>ix</STRONG></DT>
|
||||
<DD>A vector of indices.
|
||||
<BR>
|
||||
Scope: <B>global</B>.
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Type: <B>optional</B>.
|
||||
<BR>
|
||||
Intent: <B>in</B>.
|
||||
<BR>
|
||||
Specified as: an integer value. Default: use MPI_COMM_WORLD.
|
||||
Specified as: an integer array of (at least) the same size as <IMG
|
||||
WIDTH="18" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img112.png"
|
||||
ALT="$X$">.
|
||||
</DD>
|
||||
<DT><STRONG>ids</STRONG></DT>
|
||||
<DD>Identities of the processes to use for the new context; the
|
||||
argument is ignored when <code>np</code> is not specified. This allows the
|
||||
processes in the new environment to be in an order different from the
|
||||
original one.
|
||||
<DT><STRONG>dir</STRONG></DT>
|
||||
<DD>The desired ordering.
|
||||
<BR>
|
||||
Scope: <B>global</B>.
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Type: <B>optional</B>.
|
||||
Specified as: an integer value: <DL>
|
||||
<DT><STRONG>Integer and real data:</STRONG></DT>
|
||||
<DD><code>psb_sort_up_</code>,
|
||||
<code>psb_sort_down_</code>, <code>psb_asort_up_</code>, <code>psb_asort_down_</code>;
|
||||
default <code>psb_sort_up_</code>.
|
||||
</DD>
|
||||
<DT><STRONG>Complex data:</STRONG></DT>
|
||||
<DD><code>psb_lsort_up_</code>,
|
||||
<code>psb_lsort_down_</code>, <code>psb_asort_up_</code>, <code>psb_asort_down_</code>;
|
||||
default <code>psb_lsort_up_</code>.
|
||||
</DD>
|
||||
</DL>
|
||||
</DD>
|
||||
<DT><STRONG>flag</STRONG></DT>
|
||||
<DD>Whether to keep the original values in <IMG
|
||||
WIDTH="27" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img113.png"
|
||||
ALT="$IX$">.
|
||||
<BR>
|
||||
Intent: <B>in</B>.
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Specified as: an integer array. Default: use the indices <IMG
|
||||
WIDTH="94" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img94.png"
|
||||
ALT="$(0\dots np-1)$">.
|
||||
Specified as: an integer value <code>psb_sort_ovw_idx_</code> or
|
||||
<code>psb_sort_keep_idx_</code>; default <code>psb_sort_ovw_idx_</code>.
|
||||
|
||||
<P>
|
||||
</DD>
|
||||
</DL>
|
||||
|
||||
@@ -117,60 +140,152 @@ Specified as: an integer array. Default: use the indices <IMG
|
||||
<DT><STRONG><B>On Return</B></STRONG></DT>
|
||||
<DD>
|
||||
</DD>
|
||||
<DT><STRONG>icontxt</STRONG></DT>
|
||||
<DD>the communication context identifying the virtual
|
||||
parallel machine. Note that this is always a duplicate of
|
||||
<code>basectxt</code>, so that library communications are completely
|
||||
separated from other communication operations.
|
||||
<DT><STRONG>x</STRONG></DT>
|
||||
<DD>The sequence of values, in the chosen ordering.
|
||||
<BR>
|
||||
Scope: <B>global</B>.
|
||||
Type:<B>required</B>.
|
||||
<BR>
|
||||
Type: <B>required</B>.
|
||||
Specified as: an integer, real or complex array of rank 1.
|
||||
</DD>
|
||||
<DT><STRONG>ix</STRONG></DT>
|
||||
<DD>A vector of indices.
|
||||
<BR>
|
||||
Intent: <B>out</B>.
|
||||
Type: <B>Optional</B>
|
||||
<BR>
|
||||
Specified as: an integer variable.
|
||||
An integer array of rank 1, whose entries are moved to the same
|
||||
position as the corresponding entries in <IMG
|
||||
WIDTH="13" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img28.png"
|
||||
ALT="$x$">.
|
||||
</DD>
|
||||
</DL>
|
||||
|
||||
<P>
|
||||
|
||||
<P>
|
||||
<FONT SIZE="+1"><B>Notes</B></FONT>
|
||||
|
||||
<OL>
|
||||
<LI>A call to this routine must precede any other PSBLAS call.
|
||||
<LI>For integer or real data the sorting can be performed in the up/down direction, on the
|
||||
natural or absolute values;
|
||||
</LI>
|
||||
<LI>It is an error to specify a value for <IMG
|
||||
WIDTH="22" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
|
||||
<LI>For complex data the sorting can be done in a lexicographic
|
||||
order (i.e.: sort on the real part with ties broken according to
|
||||
the imaginary part) or on the absolute values;
|
||||
</LI>
|
||||
<LI>The routines return the items in the chosen ordering; the
|
||||
output difference is the handling of ties (i.e. items with an
|
||||
equal value) in the original input. With the merge-sort algorithm
|
||||
ties are preserved in the same relative order as they had in the
|
||||
original sequence, while this is not guaranteed for quicksort or
|
||||
heapsort;
|
||||
</LI>
|
||||
<LI>If <!-- MATH
|
||||
$flag = psb\_sort\_ovw\_idx\_$
|
||||
-->
|
||||
<IMG
|
||||
WIDTH="180" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img114.png"
|
||||
ALT="$flag = psb\_sort\_ovw\_idx\_$"> then the entries in <IMG
|
||||
WIDTH="62" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img115.png"
|
||||
ALT="$ix(1:n)$">
|
||||
where <IMG
|
||||
WIDTH="13" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img16.png"
|
||||
ALT="$n$"> is the size of <IMG
|
||||
WIDTH="13" HEIGHT="14" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img28.png"
|
||||
ALT="$x$"> are initialized to <!-- MATH
|
||||
$ix(i) \leftarrow
|
||||
i$
|
||||
-->
|
||||
<IMG
|
||||
WIDTH="66" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img116.png"
|
||||
ALT="$ix(i) \leftarrow
|
||||
i$">; thus, upon return from the subroutine, for each
|
||||
index <IMG
|
||||
WIDTH="9" HEIGHT="17" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img4.png"
|
||||
ALT="$i$"> we have in <IMG
|
||||
WIDTH="37" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img117.png"
|
||||
ALT="$ix(i)$"> the position that the item <IMG
|
||||
WIDTH="31" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img118.png"
|
||||
ALT="$x(i)$">
|
||||
occupied in the original data sequence;
|
||||
</LI>
|
||||
<LI>If <!-- MATH
|
||||
$flag = psb\_sort\_keep\_idx\_$
|
||||
-->
|
||||
<IMG
|
||||
WIDTH="185" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img119.png"
|
||||
ALT="$flag = psb\_sort\_keep\_idx\_$"> the routine will assume that
|
||||
the entries in <IMG
|
||||
WIDTH="35" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img120.png"
|
||||
ALT="$ix(:)$"> have already been initialized by the user;
|
||||
</LI>
|
||||
<LI>The three sorting algorithms have a similar <IMG
|
||||
WIDTH="74" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img121.png"
|
||||
ALT="$O(n \log n)$"> expected
|
||||
running time; in the average case quicksort will be the
|
||||
fastest and merge-sort the slowest. However note that:
|
||||
|
||||
<OL>
|
||||
<LI>The worst case running time for quicksort is <IMG
|
||||
WIDTH="45" HEIGHT="34" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img122.png"
|
||||
ALT="$np$"> greater than the
|
||||
number of processes available in the underlying base parallel
|
||||
environment.
|
||||
ALT="$O(n^2)$">; the algorithm
|
||||
implemented here follows the well-known median-of-three heuristics,
|
||||
but the worst case may still apply;
|
||||
</LI>
|
||||
<LI>The worst case running time for merge-sort and heap-sort is
|
||||
<IMG
|
||||
WIDTH="74" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
|
||||
SRC="img121.png"
|
||||
ALT="$O(n \log n)$"> as the average case;
|
||||
</LI>
|
||||
<LI>The merge-sort algorithm is implemented to take advantage of
|
||||
subsequences that may be already in the desired ordering prior to
|
||||
the subroutine call; this situation is relatively common when
|
||||
dealing with groups of indices of sparse matrix entries, thus
|
||||
merge-sort is often the preferred choice when a sorting is needed
|
||||
by other routines in the library.
|
||||
</LI>
|
||||
</OL>
|
||||
</LI>
|
||||
</OL>
|
||||
|
||||
<P>
|
||||
|
||||
<P>
|
||||
<HR>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
HREF="node73.html">psb_info Return</A>
|
||||
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|
||||
HREF="node71.html">Parallel environment routines</A>
|
||||
<B> Previous:</B> <A NAME="tex2html1083"
|
||||
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|
||||
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|
||||
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||||
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|
||||
<B> Up:</B> <A NAME="tex2html1078"
|
||||
HREF="node45.html">Data management routines</A>
|
||||
<B> Previous:</B> <A NAME="tex2html1074"
|
||||
HREF="node71.html">psb_sizeof Memory</A>
|
||||
<B> <A NAME="tex2html1080"
|
||||
HREF="node1.html">Contents</A></B>
|
||||
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|
||||
|
||||
|
||||
Reference in New Issue
Block a user