SkylakeX teasers (aka prime95 29.5) - Page 9

Chuck · 2018-12-01, 15:22

Are my results for 88042723 valid? Should someone run a PRP double check?

Prime95 · 2018-12-01, 16:41

Quote:

Originally Posted by Chuck

Are my results for 88042723 valid?

Almost certainly.

tshinozk · 2018-12-08, 00:06

LLR test is very fine using 18 core multi-threaded works.
I finished some known primes with no problems.
M30402457 is prime! Wh4: DB61A8B9,00000000
M77232917 is prime! Wh4: F9C5D09F,00000000

For only benchmark, there may be issues in my case.

Prime95 · 2018-12-08, 05:21

Quote:

Originally Posted by Chuck

This new AVX-512 version still isn't working correctly on my Skylake-X system.

I have an idea. Some routines were not saving and restoring xmm8 - xmm15 as per the Windows 64 ABI. If I can build an executable for you before I go on a cruise, you can test out that theory.

The idea is iffy as I build with MSVC 2005. Those registers did not exist back then.

Edit: Chuck, you have a PM.

Chuck · 2018-12-08, 14:05

Quote:

Originally Posted by Prime95

I have an idea. Some routines were not saving and restoring xmm8 - xmm15 as per the Windows 64 ABI. If I can build an executable for you before I go on a cruise, you can test out that theory.

Edit: Chuck, you have a PM.

George, the version you sent me is working correctly. I renamed my existing save files and started the LL test from the beginning with no error messages.

Madpoo · 2018-12-08, 17:51

Quote:

Originally Posted by Prime95

...The idea is iffy as I build with MSVC 2005...

We need to get you an updated copy of Visual Studio.

GP2 · 2018-12-08, 19:26

Quote:

Originally Posted by Madpoo

We need to get you an updated copy of Visual Studio.

Surely it's a backwards compatibility issue rather than an affordability issue.

ewmayer · 2018-12-08, 21:05

Quote:

Originally Posted by Prime95

I have an idea. Some routines were not saving and restoring xmm8 - xmm15 as per the Windows 64 ABI. If I can build an executable for you before I go on a cruise, you can test out that theory.

The idea is iffy as I build with MSVC 2005. Those registers did not exist back then.

LOL, and here I thought *I* was a toolchain Luddite. :)

Enjoy your cruise - will you be celebrating the holidays at sea?

Prime95 · 2018-12-09, 02:52

I was wrong, xmm8-xmm15 arrived with SSE2 in 2004. Saving the registers fixed Chuck's problem.

@Ernst: A short 10-day cruise in the Caribbean. I'll be back in time for Christmas with the grandkids. Some say I got out of town just in time as 15 to 20 inches of snow is due tomorrow. I think I would have enjoyed the once-a-decade storm.

As to upgrading MSVC, if it ain't broke don't fix it :)

GP2 · 2018-12-09, 03:07

Quote:

Originally Posted by Prime95

I was wrong, xmm8-xmm15 arrived with SSE2 in 2004. Saving the registers fixed Chuck's problem.

Any chance of a quick build 6 just before your departure? With just that one change. A few other users were also reporting some memory corruption issues too, mostly when using many cores.

Prime95 · 2018-12-09, 03:24

This is a link to the Windows executable I built for Chuck:

https://www.dropbox.com/s/sc4ib5v4f4...ime95.zip?dl=0

It contains some of the new swizzle optimizations discussed in another thread that seemed to work OK.

I'll be available for email and forum conversations, but unable to upload or download big files.

2018-12-01, 15:22	#89
Chuck May 2011 Orange Park, FL 3×5×59 Posts	Are my results for 88042723 valid? Should someone run a PRP double check?

2018-12-08, 00:06	#91
tshinozk Nov 2012 23 Posts	LLR test is very fine using 18 core multi-threaded works. I finished some known primes with no problems. M30402457 is prime! Wh4: DB61A8B9,00000000 M77232917 is prime! Wh4: F9C5D09F,00000000 For only benchmark, there may be issues in my case.

2018-12-09, 02:52	#97
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 5·11·137 Posts	I was wrong, xmm8-xmm15 arrived with SSE2 in 2004. Saving the registers fixed Chuck's problem. @Ernst: A short 10-day cruise in the Caribbean. I'll be back in time for Christmas with the grandkids. Some say I got out of town just in time as 15 to 20 inches of snow is due tomorrow. I think I would have enjoyed the once-a-decade storm. As to upgrading MSVC, if it ain't broke don't fix it :)

2018-12-09, 03:24	#99
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 5·11·137 Posts	This is a link to the Windows executable I built for Chuck: https://www.dropbox.com/s/sc4ib5v4f4...ime95.zip?dl=0 It contains some of the new swizzle optimizations discussed in another thread that seemed to work OK. I'll be available for email and forum conversations, but unable to upload or download big files.