Well guys, it took a while because of the serious limitations of ARexx for a stock AMIGA A1200 but here is a working FFT for it. ARexx has no ARRAY facility but there is a workaround. ;o)
Boy oh boy, ARexx's arithmetic is so convoluted and floating point precision is not the best.
This was a challenge. I could have generated SIN, COS and SQRT in pure ARexx but decided to use an external ARexx math(s) library instead...
It would be just as easy to create SIN, COS and SQRT in ksh too eliminating awk entirely but awk just made it easier...
Just for the record the AMIGA shell/terminal has a large subset of xterm's escape codes.
An exercise in futility? Maybe but serious fun nevertheless...
This is through FS-UAE AMIGA emulation and my real A1200 setup for easy transfer from this Macbook Pro.
ARexx code:
Hello All,
Below is a simple script i worte to find the 208th char in a file. If the char = "C" then I re-direct the line to a file called change.txt. If it is not "C" then I re-direct it to a file called delete.txt.
My problem is I have a file 0f 500K lines. this script is very slow. I am... (4 Replies)
Any means of running ksh93 in a ksh88-mode?
Might sound odd, but I want/need to restrict U/Win-developed scripts to correspond to the ksh88 version on my Solaris environment(s). Thanks. (2 Replies)
I have a text file that contains 4 million lines, each line contains 2 fields(colon as field separator). as shown:
123:444,555,666,777,888,345
233:5444,555,666,777,888,345
623:454,585,664,773,888,345
......
Here I have to split the second field(can be up to 40,000 fields) by comma into an... (14 Replies)
Hi,
I have a script that, basically, has two input files of this type:
file1
key1=value1_1_1
key2=value1_2_1
key4=value1_4_1
...
file2
key2=value2_2_1
key2=value2_2_2
key3=value2_3_1
key4=value2_4_1
...
My files are 10k lines big each (approx).
The keys are strings that don't... (7 Replies)
Hi,
I have a large number of input files with two columns of numbers.
For example:
83 1453
99 3255
99 8482
99 7372
83 175
I only wish to retain lines where the numbers fullfil two requirements. E.g:
=83
1000<=<=2000
To do this I use the following... (10 Replies)
Hi Experts,
I have several shell scripts that have been developed on a Linux box for korn ksh93.
If we want to run this software on an AIX 6.1 box that runs ksh88 by default can we just change the she-bang line to reference /bin/ksh93 which ships with AIX as its "enhanced shell" to ensure... (6 Replies)
I don't know if anyone is interested but I have been meddling with FFT for the AMIGA.
(Sadly we AMIGAns don't have these luxuries through any scripting language.
Below is a Python snippet that uses the builtin 'cmath' module to work with the lowly
Python 2.0.1 for the AMIGA. It is part of a... (0 Replies)
Hi everyone !
Im trying to know from wich version of AIX KSH93 is available ?
Internet tell me 6.x and 7.x AIX are available, bue what about 5.x ?
Is KSH93 available on AIX 5.x ?
Is it the same way to manipulate variables as KSH93 on 7.x ?
Thanks for your support and have a nice day ! (2 Replies)
Hi guys...
This is code that was originally designed to work on an upgraded AMIGA A1200 using Python 2.0.x.
Unfortunately it broke inside much later versions, NOT because of the print statement/function but other minor subtleties. So this is the final result tested on various machines including... (0 Replies)
Discussion started by: wisecracker
0 Replies
LEARN ABOUT OSX
mpi_request_free
MPI_Request_free(3OpenMPI)MPI_Request_free(3OpenMPI)NAME
MPI_Request_free - Frees a communication request object.
SYNTAX C Syntax
#include <mpi.h>
int MPI_Request_free(MPI_Request *request)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_REQUEST_FREE(REQUEST, IERROR)
INTEGER REQUEST, IERROR
C++ Syntax
#include <mpi.h>
void Request::Free()
INPUT /OUTPUT PARAMETER
request
Communication request (handle).
DESCRIPTION
This operation allows a request object to be deallocated without waiting for the associated communication to complete.
MPI_Request_free marks the request object for deallocation and sets request to MPI_REQUEST_NULL. Any ongoing communication that is associ-
ated with the request will be allowed to complete. The request will be deallocated only after its completion.
NOTES
Once a request is freed by a call to MPI_Request_free, it is not possible to check for the successful completion of the associated communi-
cation with calls to MPI_Wait or MPI_Test. Also, if an error occurs subsequently during the communication, an error code cannot be returned
to the user -- such an error must be treated as fatal. Questions arise as to how one knows when the operations have completed when using
MPI_Request_free. Depending on the program logic, there may be other ways in which the program knows that certain operations have completed
and this makes usage of MPI_Request_free practical. For example, an active send request could be freed when the logic of the program is
such that the receiver sends a reply to the message sent -- the arrival of the reply informs the sender that the send has completed and the
send buffer can be reused. An active receive request should never be freed, as the receiver will have no way to verify that the receive has
completed and the receive buffer can be reused.
Example:
CALL MPI_COMM_RANK(MPI_COMM_WORLD, rank)
IF(rank.EQ.0) THEN
DO i=1, n
CALL MPI_ISEND(outval, 1, MPI_REAL, 1, 0, req, ierr)
CALL MPI_REQUEST_FREE(req, ierr)
CALL MPI_IRECV(inval, 1, MPI_REAL, 1, 0, req, ierr)
CALL MPI_WAIT(req, status, ierr)
END DO
ELSE ! rank.EQ.1
CALL MPI_IRECV(inval, 1, MPI_REAL, 0, 0, req, ierr)
CALL MPI_WAIT(req, status)
DO I=1, n-1
CALL MPI_ISEND(outval, 1, MPI_REAL, 0, 0, req, ierr)
CALL MPI_REQUEST_FREE(req, ierr)
CALL MPI_IRECV(inval, 1, MPI_REAL, 0, 0, req, ierr)
CALL MPI_WAIT(req, status, ierr)
END DO
CALL MPI_ISEND(outval, 1, MPI_REAL, 0, 0, req, ierr)
CALL MPI_WAIT(req, status)
END IF
This routine is normally used to free persistent requests created with either MPI_Recv_init or MPI_Send_init and friends. However, it can
be used to free a request created with MPI_Irecv or MPI_Isend and friends; in that case the use can not use the test/wait routines on the
request.
It is permitted to free an active request. However, once freed, you can not use the request in a wait or test routine (e.g., MPI_Wait ).
ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI:Exception object.
Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be
used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
SEE ALSO
MPI_Isend
MPI_Irecv
MPI_Issend
MPI_Ibsend
MPI_Irsend
MPI_Recv_init
MPI_Send_init
MPI_Ssend_init
MPI_Rsend_init
MPI_Test
MPI_Wait
MPI_Waitall
MPI_Waitany
MPI_Waitsome
MPI_Testall
MPI_Testany
MPI_Testsome
Open MPI 1.2 September 2006 MPI_Request_free(3OpenMPI)