Code:

Mlucas 17.1
http://hogranch.com/mayer/README.html
INFO: testing qfloat routines...
CPU Family = x86_64, OS = Linux, 64-bit Version, compiled with Gnu C [or other compatible], Version 8.2.0.
INFO: CPU supports SSE2 instruction set, but using scalar floating-point build.
INFO: Using inline-macro form of MUL_LOHI64.
INFO: MLUCAS_PATH is set to ""
INFO: using 64-bit-significand form of floating-double rounding constant for scalar-mode DNINT emulation.
Setting DAT_BITS = 10, PAD_BITS = 2
INFO: testing IMUL routines...
INFO: testing FFT radix tables...
For the full list of command line options, run the program with the -h flag.
Mlucas command line options:
Symbol and abbreviation key:
<CR> : carriage return
| : separator for one-of-the-following multiple-choice menus
[] : encloses optional arguments
{} : denotes user-supplied numerical arguments of the type noted.
({int} means nonnegative integer, {+int} = positive int, {float} = float.)
-argument : Vertical stacking indicates argument short 'nickname' options,
-arg : e.g. in this example '-arg' can be used in place of '-argument'.
Supported arguments:
<CR> Default mode: looks for a worktodo.ini file in the local
directory; if none found, prompts for manual keyboard entry
Help submenus by topic. No additional arguments may follow the displayed ones:
-s Post-build self-testing for various FFT-length rnages.
-fftlen FFT-length setting.
-radset FFT radix-set specification.
-m[ersenne] Mersenne-number primality testing.
-f[ermat] Fermat-number primality testing.
-iters Iteration-number setting.
-nthread|cpu Setting threadcount and CPU core affinity.
*** NOTE: *** The following self-test options will cause an mlucas.cfg file containing
the optimal FFT radix set for the runlength(s) tested to be created (if one did not
exist previously) or appended (if one did) with new timing data. Such a file-write is
triggered by each complete set of FFT radices available at a given FFT length being
tested, i.e. by a self-test without a user-specified -radset argument.
(A user-specific Mersenne exponent may be supplied via the -m flag; if none is specified,
the program will use the largest permissible exponent for the given FFT length, based on
its internal length-setting algorithm). The user must specify the number of iterations for
the self-test via the -iters flag; while it is not required, it is strongly recommended to
stick to one of the standard timing-test values of -iters = [100,1000,10000], with the larger
values being preferred for multithreaded timing tests, in order to assure a decently large
slice of CPU time. Similarly, it is recommended to not use the -m flag for such tests, unless
roundoff error levels on a given compute platform are such that the default exponent at one or
more FFT lengths of interest prevents a reasonable sampling of available radix sets at same.
If the user lets the program set the exponent and uses one of the aforementioned standard
self-test iteration counts, the resulting best-timing FFT radix set will only be written to the
resulting mlucas.cfg file if the timing-test result matches the internally- stored precomputed
one for the given default exponent at the iteration count in question, with eligible radix sets
consisting of those for which the roundoff error remains below an acceptable threshold.
If the user instead specifies the exponent (only allowed for a single-FFT-length timing test)****************
and/or a non-default iteration number, the resulting best-timing FFT radix set will only be
written to the resulting mlucas.cfg file if the timing-test results match each other? ********* check logic here *******
This is important for tuning code parameters to your particular platform.
FOR BEST RESULTS, RUN ANY SELF-TESTS UNDER ZERO- OR CONSTANT-LOAD CONDITIONS
-s {...} Self-test, user must also supply exponent [via -m or -f] and/or FFT length to use.
-s tiny Runs 100-iteration self-tests on set of 32 Mersenne exponents, ranging from 173431 to 2455003
-s t This will take around 1 minute on a fast CPU..
-s small Runs 100-iteration self-tests on set of 24 Mersenne exponents, ranging from 173431 to 1245877
-s s This will take around 10 minutes on a fast CPU..
**** THIS IS THE ONLY SELF-TEST ORDINARY USERS ARE RECOMMENDED TO DO: ******
* *
* -s medium Runs set of 24 Mersenne exponents, ranging from 1327099 to 9530803
* -s m This will take around an hour on a fast CPU. *
* *
****************************************************************************
-s large Runs set of 24 Mersenne exponents, ranging from 10151971 to 72851621
-s l This will take around an hour on a fast CPU.
-s huge Runs set of 16 Mersenne exponents, ranging from 77597293 to 282508657
-s h This will take a couple of hours on a fast CPU.
-s all Runs 100-iteration self-tests of all test Mersenne exponents and all FFT radix sets.
-s a This will take several hours on a fast CPU.
-fftlen {+int} If {+int} is one of the available FFT lengths (in Kilodoubles), runs all
all available FFT radices available at that length, unless the -radset flag is
invoked (see below for details). If -fftlen is invoked without the -iters flag,
it is assumed the user wishes to do a production run with a non-default FFT length,
In this case the program requires a valid worktodo.ini-file entry with exponent
not more than 5% larger than the default maximum for that FFT length.
If -fftlen is invoked with a user-supplied value of -iters but without a
user-supplied exponent, the program will do the specified number of iterations
using the default self-test Mersenne or Fermat exponent for that FFT length.
If -fftlen is invoked with a user-supplied value of -iters and either the
-m or -f flag and a user-supplied exponent, the program will do the specified
number of iterations of either the Lucas-Lehmer test with starting value 4 (-m)
or the Pe'pin test with starting value 3 (-f) on the user-specified modulus.
In either of the latter 2 cases, the program will produce a cfg-file entry based
on the timing results, assuming at least one radix set ran the specified #iters
to completion without suffering a fatal error of some kind.
Use this to find the optimal radix set for a single FFT length on your hardware.
NOTE: IF YOU USE OTHER THAN THE DEFAULT MODULUS OR #ITERS FOR SUCH A SINGLE-FFT-
LENGTH TIMING TEST, IT IS UP TO YOU TO MANUALLY VERIFY THAT THE RESIDUES OUTPUT
MATCH FOR ALL FFT RADIX COMBINATIONS AND THE ROUNDOFF ERRORS ARE REASONABLE!
-radset {int} Specific index of a set of complex FFT radices to use, based on the big
select table in the function get_fft_radices(). Requires a supported value of
-fftlen to also be specified, as well as a value of -iters for the timing test.
-m [{+int}] Performs a Lucas-Lehmer primality test of the Mersenne number M(int) = 2^int - 1,
where int must be an odd prime. If -iters is also invoked, this indicates a timing test.
and requires suitable added arguments (-fftlen and, optionally, -radset) to be supplied.
If the -fftlen option (and optionally -radset) is also invoked but -iters is not, the
program first checks the first line of the worktodo.ini file to see if the assignment
specified there is a Lucas-Lehmer test with the same exponent as specified via the -m
argument. If so, the -fftlen argument is treated as a user override of the default FFT
length for the exponent. If -radset is also invoked, this is similarly treated as a user-
specified radix set for the user-set FFT length; otherwise the program will use the cfg file
to select the radix set to be used for the user-forced FFT length.
If the worktodo.ini file entry does not match the -m value, a set of timing self-tests is
run on the user-specified Mersenne number using all sets of FFT radices available at the
specified FFT length.
If the -fftlen option is not invoked, the self-tests use all sets of
FFT radices available at that exponent's default FFT length.
Use this to find the optimal radix set for a single given Mersenne number
exponent on your hardware, similarly to the -fftlen option.
Performs as many iterations as specified via the -iters flag [required].
-f {int} Performs a base-3 Pe'pin test on the Fermat number F(num) = 2^(2^num) + 1.
If desired this can be invoked together with the -fftlen option.
as for the Mersenne-number self-tests (see notes about the -m flag;
note that not all FFT lengths supported for -m are available for -f).
Optimal radix sets and timings are written to a fermat.cfg file.
Performs as many iterations as specified via the -iters flag [required].
-iters {int} Do {int} self-test iterations of the type determined by the
modulus-related options (-s/-m = Lucas-Lehmer test iterations with
initial seed 4, -f = Pe'pin-test squarings with initial seed 3.