[QUOTE=SELROC;493596]I just tried out mfakto compilation on debian:
[CODE]

g++ sieve.o timer.o parse.o read_config.o mfaktc.o checkpoint.o signal_handler.o filelocking.o output.o mfakto.o gpusieve.o perftest.o menu.o kbhit.o -m64 -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -L/home/sel/AMDAPPSDK-3.0/lib/x86_64 -L/opt/rocm/opencl/lib/x86_64 -lOpenCL -o ../mfakto
lto1: fatal error: bytecode stream in file ‘sieve.o’ generated with LTO version 5.2 instead of the expected 7.0
compilation terminated.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make: *** [Makefile:83: ../mfakto] Error 1


[/CODE][/QUOTE]
This may indicate that you are trying to link together object files (.o) from different compilations. Try cleaning up by carefully removing all .o (starting with "sieve.o"), and rebuild.

[QUOTE=preda;493654]This may indicate that you are trying to link together object files (.o) from different compilations. Try cleaning up by carefully removing all .o (starting with "sieve.o"), and rebuild.[/QUOTE]


Thank you, make clean was needed. Mfakto is compiled now, though with some warning:


[CODE]
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -funroll-all-loops -funsafe-loop-optimizations -fira-region=all -fsched-spec-load -fsched-stalled-insns=10 -fsched-stalled-insns-dep=10 -fno-align-labels -c sieve.c -o sieve.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c timer.c -o timer.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c parse.c -o parse.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c read_config.c -o read_config.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c mfaktc.c -o mfaktc.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c checkpoint.c -o checkpoint.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c signal_handler.c -o signal_handler.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c filelocking.c -o filelocking.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c output.c -o output.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c mfakto.cpp -o mfakto.o
mfakto.cpp: In function ‘int init_CL(int, cl_int*)’:
mfakto.cpp:553:83: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp:553:83: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp:557:85: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp:557:85: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp:571:86: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueuePrf = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp:571:86: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueuePrf = clCreateCommandQueue(context, devices[*devnumber], props, &status);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
mfakto.cpp: In function ‘int run_mod_kernel(cl_ulong, cl_ulong, cl_ulong, cl_float, cl_ulong*, cl_ulong*)’:
mfakto.cpp:1649:26: warning: ‘cl_int clEnqueueTask(cl_command_queue, cl_kernel, cl_uint, _cl_event* const*, _cl_event**)’ is deprecated [-Wdeprecated-declarations]
&mod_evt);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1373:1: note: declared here
clEnqueueTask(cl_command_queue /* command_queue */,
^~~~~~~~~~~~~
mfakto.cpp:1649:26: warning: ‘cl_int clEnqueueTask(cl_command_queue, cl_kernel, cl_uint, _cl_event* const*, _cl_event**)’ is deprecated [-Wdeprecated-declarations]
&mod_evt);
^
In file included from my_types.h:22,
from mfakto.h:23,
from mfakto.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1373:1: note: declared here
clEnqueueTask(cl_command_queue /* command_queue */,
^~~~~~~~~~~~~
mfakto.cpp: In function ‘int run_kernel15(cl_kernel, cl_uint, int75, int, cl_uint8, cl_mem, cl_int, cl_int)’:
mfakto.cpp:1717:5: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6
int run_kernel15(cl_kernel l_kernel, cl_uint exp, int75 k_base, int stream, cl_uint8 b_in, cl_mem res, cl_int shiftcount, cl_int bin_max)
^~~~~~~~~~~~
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c gpusieve.cpp -o gpusieve.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c perftest.cpp -o perftest.o
perftest.cpp:1737:18: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
std::cerr << "\nKernel file \""KERNEL_FILE"\" not found, it needs to be in the same directory as the executable.\n";
^
perftest.cpp: In function ‘GPUKernels test_cpu_tf_kernels(cl_uint)’:
perftest.cpp:1017:10: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘cl_ulong’ {aka ‘long unsigned int’} [-Wformat=]
printf("exponent=%u, %lldM FCs (sieved: %lldM FCs) each, ",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mystuff.exponent, num_fcs >> 20, ((cl_ulong)num_loops*mystuff.threads_per_grid)>>20);
~~~~~~~~~~~~~
perftest.cpp:1017:10: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘cl_ulong’ {aka ‘long unsigned int’} [-Wformat=]
perftest.cpp:1021:10: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘cl_ulong’ {aka ‘long unsigned int’} [-Wformat=]
printf("k=%llu, %f GHz-days (assignment), %f GHz-days (per test): ", k, ghzd, ghzdt); fflush(stdout);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
perftest.cpp: In function ‘GPUKernels test_gpu_tf_kernels(cl_uint)’:
perftest.cpp:1153:10: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘cl_ulong’ {aka ‘long unsigned int’} [-Wformat=]
printf("exponent=%u, %lldM FCs each, ", mystuff.exponent, num_fcs>>20);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~
perftest.cpp:1156:10: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘cl_ulong’ {aka ‘long unsigned int’} [-Wformat=]
printf("k=%llu, %f GHz-days (assignment), %f GHz-days (per test): ", k, ghzd, ghzdt); fflush(stdout);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
perftest.cpp: In function ‘void CL_test(cl_int)’:
perftest.cpp:1692:82: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1692:82: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1696:84: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1696:84: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueue = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1707:85: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueuePrf = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1707:85: warning: ‘_cl_command_queue* clCreateCommandQueue(cl_context, cl_device_id, cl_command_queue_properties, cl_int*)’ is deprecated [-Wdeprecated-declarations]
commandQueuePrf = clCreateCommandQueue(context, devices[devnumber], props, &status);
^
In file included from perftest.cpp:25:
/home/sel/AMDAPPSDK-3.0/include/CL/cl.h:1359:1: note: declared here
clCreateCommandQueue(cl_context /* context */,
^~~~~~~~~~~~~~~~~~~~
perftest.cpp:1767:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
if (mystuff.CompileOptions[0]) // if mfakto.ini defined compile options, override the default with them
^~
perftest.cpp:1770:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
printf("Compiling kernels (build options: \"%s\").", program_options);
^~~~~~
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c menu.cpp -o menu.o
gcc -m64 -Wall -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -I/home/sel/AMDAPPSDK-3.0/include -DBUILD_OPENCL -c kbhit.cpp -o kbhit.o
g++ sieve.o timer.o parse.o read_config.o mfaktc.o checkpoint.o signal_handler.o filelocking.o output.o mfakto.o gpusieve.o perftest.o menu.o kbhit.o -m64 -O3 -funroll-loops -ffast-math -finline-functions -frerun-loop-opt -fgcse-sm -fgcse-las -flto -L/home/sel/AMDAPPSDK-3.0/lib/x86_64 -L/opt/rocm/opencl/lib/x86_64 -lOpenCL -o ../mfakto
mfakto.cpp: In function ‘tf_class_opencl.constprop’:
mfakto.cpp:2696:35: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6
status = run_gs_kernel15(kernel_info[use_kernel].kernel, numblocks, shared_mem_required, k_base, b_in, shiftcount);
^
mfakto.cpp: In function ‘run_gs_kernel15’:
mfakto.cpp:2107:5: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6
int run_gs_kernel15(cl_kernel kernel, cl_uint numblocks, cl_uint shared_mem_required, int75 k_base, cl_uint8 b_in, cl_uint shiftcount)
^
read_config.c: In function ‘my_read_string’:
read_config.c:124:9: warning: ‘strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
strncpy(string, buf + idx + 1, found);
^
read_config.c:120:30: note: length computed here
found = (unsigned int) strlen(buf + idx + 1);
^

[/CODE]


Note the following line:


mfakto.cpp:2107:5: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6

[QUOTE=SELROC;493657]mfakto.cpp:2107:5: note: The ABI for passing parameters with 32-byte alignment has changed in GCC 4.6[/QUOTE]

Try it. If it passes the self-test, it's good to go.

Transform selection in V3.5 OpenOwL
 

[CODE]C:\msys64\home\ken\v35test>openowl-v35-457601f-w64 -h
gpuowl-OpenCL 3.5-457601f

Command line options:

-user <name> : specify the user name.
-cpu <name> : specify the hardware name.
-time : display kernel profiling information.
-fft <size> : specify FFT size, such as: 5000K, 4M, +2, -1.
-block 100|200|400 : select PRP-check block size. Smaller block is slower but detects errors earlier.
-carry long|short : force carry type. Short carry may be faster, but requires high bits/word.
-list fft : display a list of available FFT configurations.
-device <N> : select a specific device:
0 : Ellesmere-36x1266-@28:0.0 Radeon (TM) RX 480 Graphics
1 : gfx804-8x1203-@3:0.0 Radeon 550 Series
2 : Intel(R) Xeon(R) CPU E5645 @ 2.40GHz-12x2394-@0:0.0[/CODE][CODE]C:\msys64\home\ken\v35test>openowl-v35-457601f-w64 -list fft
gpuowl-OpenCL 3.5-457601f
FFT maxExp W H M
0.5M 10.3M 512 512 1
1.0M 20.3M 1024 512 1
1.0M 20.3M 512 1024 1
2.0M 39.8M 1024 1024 1
2.0M 39.8M 512 2048 1
2.0M 39.8M 2048 512 1
2.5M 49.4M 512 512 5
4.0M 78.0M 1024 2048 1
4.0M 78.0M 2048 1024 1
4.0M 78.0M 4096 512 1
4.5M 87.5M 512 512 9
5.0M 96.9M 1024 512 5
5.0M 96.9M 512 1024 5
8.0M 153.0M 2048 2048 1
8.0M 153.0M 4096 1024 1
9.0M 171.6M 1024 512 9
9.0M 171.6M 512 1024 9
10.0M 190.0M 1024 1024 5
10.0M 190.0M 512 2048 5
10.0M 190.0M 2048 512 5
16.0M 300.0M 4096 2048 1
18.0M 336.3M 1024 1024 9
18.0M 336.3M 512 2048 9
18.0M 336.3M 2048 512 9
20.0M 372.5M 1024 2048 5
20.0M 372.5M 2048 1024 5
20.0M 372.5M 4096 512 5
36.0M 659.0M 1024 2048 9
36.0M 659.0M 2048 1024 9
36.0M 659.0M 4096 512 9
40.0M 730.0M 2048 2048 5
40.0M 730.0M 4096 1024 5
72.0M 1290.9M 2048 2048 9
72.0M 1290.9M 4096 1024 9
80.0M 1429.8M 4096 2048 5
144.0M 2527.5M 4096 2048 9

FFT 4096K: Width 1024 (256x4), Height 2048 (256x8); 18.48 bits/word
Note: using short carry kernels
...[/CODE]But how does a user specify selection among transforms of the same size? (Most lengths above have more than one flavor.)

Presumably the program selects the minimum adequate length for speed. How does the program select one flavor of a given length versus another flavor?

Are there speed differences or other differences known?

[QUOTE=kriesel;493684][CODE]
18.0M 336.3M 1024 1024 9
18.0M 336.3M 512 2048 9
18.0M 336.3M 2048 512 9
[/CODE]But how does a user specify selection among transforms of the same size? (Most lengths above have more than one flavor.)
[/QUOTE]

As you say, by default the first variant of the size that fits is selected. The other ones can be specified using "-fft +1", "-fft +2", "-fft -1" etc. on the command line, which move in the list with the given increment. (not ideal, I know).

I would be surprised if a higher-size FFT would ever be faster than a lower-sized one. OTOH among the same-size variants, there are speed differences, and the first (the default) is not necessarily the fastest. The user should try them and choose the best.

[QUOTE=preda;493669]Try it. If it passes the self-test, it's good to go.[/QUOTE]




Mfakto passed the self test. Doing performance testing now.

[QUOTE=SELROC;493698]Mfakto passed the self test. Doing performance testing now.[/QUOTE]


Also got some exponent to test, but the results.txt files does not seem in a format that can be submitted to primenet...

samples of mfakto output
 

[QUOTE=SELROC;493700]Also got some exponent to test, but the results.txt files does not seem in a format that can be submitted to primenet...[/QUOTE]
Sample mfakto output:
[CODE][Sun Feb 25 22:55:24 2018]
UID: kriesel/condorella-rx550, no factor for M942477799 from 2^70 to 2^71 [mfakto 0.15pre6-Win cl_barrett15_73_gs_2][/CODE][CODE]
[Fri Apr 13 11:13:22 2018]
UID: kriesel/condorella-rx550, M290001377 has a factor: 96303240212210144213599 [TF:76:77:mfakto 0.15pre6-Win cl_barrett15_82_gs_2]
[Fri Apr 13 13:53:29 2018]
UID: kriesel/condorella-rx550, found 1 factor for M290001377 from 2^76 to 2^77 [mfakto 0.15pre6-Win cl_barrett15_82_gs_2]
[/CODE][CODE][Thu Apr 26 12:42:53 2018]
UID: kriesel/condorella-rx550, M457739 has a factor: 3300797548509019438097 [TF:71:72:mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[Sat Apr 28 22:07:45 2018]
UID: kriesel/condorella-rx550, M457739 has a factor: 2465216072071389650639 [TF:71:72:mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[Mon Apr 30 00:18:37 2018]
UID: kriesel/condorella-rx550, found 2 factors for M457739 from 2^71 to 2^72 [mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[/CODE]What does your output look like?

RX480 timings in V3.3 and V3.5 OpenOwL
 

See the attachment. With rare exceptions, the default lengths seem fastest in V3.5. V3.5 is faster than each corresponding V3.3 test, by slight and varying amounts versus fft length. All tests performed on Win 7 X64, same system, same patch state, same driver version, same gpu. Initial iterations are faster than later ones. Most tests were 160k iterations or more in length and ignore the first 800 to 10,000 iterations' speed, and average the rest.

In a nutshell, use the default fft lengths, except for 10M and 18M, use -fft +2 on the command line or in a batch file.
It's possible some further gains could be found by testing carry choices.

A couple of V3.5 test exponents produced errors, indicating the maximum exponent guidance may be set a bit too high.

[QUOTE=kriesel;493711]Sample mfakto output:
[CODE][Sun Feb 25 22:55:24 2018]
UID: kriesel/condorella-rx550, no factor for M942477799 from 2^70 to 2^71 [mfakto 0.15pre6-Win cl_barrett15_73_gs_2][/CODE][CODE]
[Fri Apr 13 11:13:22 2018]
UID: kriesel/condorella-rx550, M290001377 has a factor: 96303240212210144213599 [TF:76:77:mfakto 0.15pre6-Win cl_barrett15_82_gs_2]
[Fri Apr 13 13:53:29 2018]
UID: kriesel/condorella-rx550, found 1 factor for M290001377 from 2^76 to 2^77 [mfakto 0.15pre6-Win cl_barrett15_82_gs_2]
[/CODE][CODE][Thu Apr 26 12:42:53 2018]
UID: kriesel/condorella-rx550, M457739 has a factor: 3300797548509019438097 [TF:71:72:mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[Sat Apr 28 22:07:45 2018]
UID: kriesel/condorella-rx550, M457739 has a factor: 2465216072071389650639 [TF:71:72:mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[Mon Apr 30 00:18:37 2018]
UID: kriesel/condorella-rx550, found 2 factors for M457739 from 2^71 to 2^72 [mfakto 0.15pre6-Win cl_barrett15_73_gs_2]
[/CODE]What does your output look like?[/QUOTE]


it lacks the UID...


[CODE][Sun Aug 12 10:20:01 2018]
no factor for M218863159 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:22:37 2018]
no factor for M218863279 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:25:13 2018]
no factor for M218863283 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:27:48 2018]
no factor for M218863367 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:30:23 2018]
no factor for M218863409 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:32:59 2018]
no factor for M218863501 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:35:34 2018]
no factor for M218863529 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:38:11 2018]
no factor for M218863531 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:40:44 2018]
no factor for M218863649 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:43:19 2018]
no factor for M218863663 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[/CODE]

[QUOTE=SELROC;493718]it lacks the UID...


[CODE][Sun Aug 12 10:20:01 2018]
no factor for M218863159 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:22:37 2018]
no factor for M218863279 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:25:13 2018]
no factor for M218863283 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:27:48 2018]
no factor for M218863367 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:30:23 2018]
no factor for M218863409 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:32:59 2018]
no factor for M218863501 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:35:34 2018]
no factor for M218863529 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:38:11 2018]
no factor for M218863531 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:40:44 2018]
no factor for M218863649 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[Sun Aug 12 10:43:19 2018]
no factor for M218863663 from 2^70 to 2^71 [mfakto 0.15pre6 cl_barrett15_73_gs_2]
[/CODE][/QUOTE]
UID is optional; modify the ini file and restart to include that. You'll still need to log in before pasting the results into the manual results submission form.