Rsync quite slow (using very little cpu): how to improve its speed? Post: 303018806

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slaed5.f

slaed5.f(3)							      LAPACK							       slaed5.f(3)

NAME

       slaed5.f -

SYNOPSIS

   Functions/Subroutines
       subroutine slaed5 (I, D, Z, DELTA, RHO, DLAM)
	   SLAED5

Function/Subroutine Documentation
   subroutine slaed5 (integerI, real, dimension( 2 )D, real, dimension( 2 )Z, real, dimension( 2 )DELTA, realRHO, realDLAM)
       SLAED5

       Purpose:

	    This subroutine computes the I-th eigenvalue of a symmetric rank-one
	    modification of a 2-by-2 diagonal matrix

		       diag( D )  +  RHO * Z * transpose(Z) .

	    The diagonal elements in the array D are assumed to satisfy

		       D(i) < D(j)  for  i < j .

	    We also assume RHO > 0 and that the Euclidean norm of the vector
	    Z is one.

       Parameters:
	   I

		     I is INTEGER
		    The index of the eigenvalue to be computed.  I = 1 or I = 2.

	   D

		     D is REAL array, dimension (2)
		    The original eigenvalues.  We assume D(1) < D(2).

	   Z

		     Z is REAL array, dimension (2)
		    The components of the updating vector.

	   DELTA

		     DELTA is REAL array, dimension (2)
		    The vector DELTA contains the information necessary
		    to construct the eigenvectors.

	   RHO

		     RHO is REAL
		    The scalar in the symmetric updating formula.

	   DLAM

		     DLAM is REAL
		    The computed lambda_I, the I-th updated eigenvalue.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Contributors:
	   Ren-Cang Li, Computer Science Division, University of California at Berkeley, USA

       Definition at line 109 of file slaed5.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       slaed5.f(3)