I applied for a Covid-19 research license to get the Intel compiler. Waiting to hear back.

I checked and gcc comes as a default in LM 20:
gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)

I also installed libraries: sudo apt-get install build-essential gdb

I'm assuming there's no need to edit or modify your code in any way. So now I'm learning to use gcc.

find the source code of the application here: https://bitbucket.org/francesco-asnicar/pc-boinc/

It appears that after compiling I'll need to test it using the BOINC Anonymous Platform. https://boinc.berkeley.edu/wiki/Anonymous_platform
I ginned up an app_info.xml file by emulating the TN-Grid client_state.xml info:

it seems to me (but I may be wrong) that you don't need to define the plan_class, instead you should define the platform (like <platform>x86_64-pc-linux-gnu</platform>)

When switching from regular use to anonymous platform I suggest to: wait until there are no workunits in the cache (or abort them all), exit boinc, copy the app_info.xml and the executable in the proper place (check its x bit, chmod a+x), start boinc.

EDIT: which compiler switch did you use? -march=skylake-avx512 ?

I looked at that AVX-512 list and guessed that some could be excluded, e.g. AI, neural nets & Galois Fields. Beyond that I'm willing to try them all if we have a way to test and tell them apart. But we seem to only have 4 to chose from: F, VL, DQ & BW. CD is only for Xeon Phi. I try them in this order: F, BW, DQ & VL.

BTW, I don't think I've ever seen BOINC settle on just one. If I sort BoincTasks on (WU) Name and look for clusters running on the same computer with 2 or 3 instruction sets running I can't tell their speeds apart. One WU to another can differ by hours. Even within the parts of a WU I doubt they're the same, e.g.
175168_Hs_T119704-RHBDD1_wu-1_1606188238821
175168_Hs_T119704-RHBDD1_wu-2_1606188238821
175168_Hs_T119704-RHBDD1_wu-3_1606188238821
etc...
That's why having a Calibration Standard WU could be nice. It could be DLed from https://bitbucket.org/francesco-asnicar/pc-boinc/downloads/ but never ULed, just note the completion time for comparison. Then use BOINC Anonymous Platform to test versions one by one.

Ok, I edited makefile by adding:

I've been reading the 11,041 line config.log file and it keeps trying different things. I suspect part of the problem may be that when I cloned BOINC I got the dev version and not the 7.16.6 release:
| #define PACKAGE_NAME "BOINC"
| #define PACKAGE_TARNAME "boinc"
| #define PACKAGE_VERSION "7.17.0"

git clone https://github.com/BOINC/boinc boinc

How can I clone 7.16.6???

I'll look at your zip.

After reading this topic, I started reviewing the code.

I suggest you first compile the program as-is.
run test_run2.sh so the file compare says the files are equal.

I sugest you make a copy of test_run2.sh (and bin/pc) and change the parameter value '2470' to something large like 100000
the program runs longer so you should see the diffrence better. Output files will not be corrects since the input file does not contain that many entries.

make a backup of the file bin/pc. With each make you will overwrite this file.

For a quick and dirty tryout you need to:

Look in de SIMD folder (under src) you notice that there are 4 code paths: NEON,scalar,SSE and AVX.
change the file AvxDoubleVectorTraits.hpp in src/simd folder

change VectorSize from 32 to 64
and DataAlignment from 32 to 64.

change avx functions like _mm256_add_pd with the avx512 ones like _mm512_add_pd.
see intels reference guide to do so:

https://software.intel.com/sites/landingpage/IntrinsicsGuide/#techs=AVX_512&text=_pd&expand=127

Also do not forget to change the sum method. it adds only 4 variables (avx) instead of 8 (avx512)

Also change DoubleVector.hpp (see http://gene.disi.unitn.it/test/forum_thread.php?id=302 )
In 2017 avx was not very performant on intel haswell so someone changed it back to SSE. This is the reason that avx code is as fast as the sse code.

line 71: typedef AvxDoubleVector DoubleVectorLong;
line 72: typedef SseDoubleVector DoubleVector;
line 73: #elif defined (__SSE2__)

change line 72 to
typedef AvxDoubleVector DoubleVector;

I suggest you first compile the program as-is.

First thing you need to correct in your app_info is the application version.
You can't use an already existing app version that the project already distributes.

So change to app version 999 or something well out of range of what the project might ever release.

And change the applications name accordingly of course

My special gpu application I compiled for Einstein BRP on the Nano is versioned 999.

I've been reading the 11,041 line config.log file and it keeps trying different things. I suspect part of the problem may be that when I cloned BOINC I got the dev version and not the 7.16.6 release:
| #define PACKAGE_NAME "BOINC"
| #define PACKAGE_TARNAME "boinc"
| #define PACKAGE_VERSION "7.17.0"

git clone https://github.com/BOINC/boinc boinc

How can I clone 7.16.6???

I'll look at your zip.

First thing you need to correct in your app_info is the application version.
You can't use an already existing app version that the project already distributes.

So change to app version 999 or something well out of range of what the project might ever release.

And change the applications name accordingly of course

Yes. This is my Einstein app_info for example.

Use the Tags branch at github. You can clone any point release of BOINC by going into the TAG tree.
https://github.com/BOINC/boinc/tree/client_release/7.16/7.16.6