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Profile Keith Myers Special Project $250 donor
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Message 1912705 - Posted: 13 Jan 2018, 2:37:08 UTC

Guess we should be running the SSE41 app on the BLC05 cpu tasks.


keith@Darksider:~/Downloads/KWSN-Bench-Linux-MBv7_v2.01.08$ ./benchmark
KWSN-Linux-MBbench v2.1.08
Running on Darksider at Fri 12 Jan 2018 10:44:33 PM UTC
----------------------------------------------------------------
Starting benchmark run...
----------------------------------------------------------------
Listing wu-file(s) in /testWUs :
blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

Listing executable(s) in /APPS :
MBv8_8.05r3345_avx_linux64

Listing executable in /REF_APPS :
MBv8_8.22r3711_sse41_x86_64-pc-linux-gnu
----------------------------------------------------------------
Current WU: blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

----------------------------------------------------------------
Running default app with command :... MBv8_8.22r3711_sse41_x86_64-pc-linux-gnu
Elapsed Time: ....................... 1909 seconds

----------------------------------------------------------------
Running app with command : .......... MBv8_8.05r3345_avx_linux64
Elapsed Time : ...................... 1899 seconds
Speed compared to default : ......... 100 %
-----------------
Comparing results
Result      : Strongly similar,  Q= 99.96%

----------------------------------------------------------------
Done with blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

====================================================================

Done with Benchmark run! Removing temporary files!
keith@Darksider:~/Downloads/KWSN-Bench-Linux-MBv7_v2.01.08$ ./benchmark
KWSN-Linux-MBbench v2.1.08
Running on Darksider at Fri 12 Jan 2018 11:58:00 PM UTC
----------------------------------------------------------------
Starting benchmark run...
----------------------------------------------------------------
Listing wu-file(s) in /testWUs :
blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

Listing executable(s) in /APPS :
MBv8_8.05r3345_avx_linux64

Listing executable in /REF_APPS :
MBv8_8.22r3712_avx2_x86_64-pc-linux-gnu
----------------------------------------------------------------
Current WU: blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

----------------------------------------------------------------
Running default app with command :... MBv8_8.22r3712_avx2_x86_64-pc-linux-gnu
Elapsed Time: ....................... 2185 seconds

----------------------------------------------------------------
Running app with command : .......... MBv8_8.05r3345_avx_linux64
Elapsed Time : ...................... 1772 seconds
Speed compared to default : ......... 123 %
-----------------
Comparing results
Result      : Strongly similar,  Q= 99.95%

----------------------------------------------------------------
Done with blc05_2bit_guppi_57976_78659_HIP61801_0041.32033.0.22.45.190.vlar.wu

====================================================================

Done with Benchmark run! Removing temporary files!
keith@Darksider:~/Downloads/KWSN-Bench-Linux-MBv7_v2.01.08$ 


Its a wash between the r3345 AVX app and the r3711 SSE41 apps. But the r3345 AVX app is 23% faster than the r3712 AVX2 app.
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Message 1912720 - Posted: 13 Jan 2018, 3:47:57 UTC - in response to Message 1912085.  

From my experience it depends on the tasks and the CPU load.
On my benches AVX2 was slower than SSE4.1 in most cases on my Ryzen 1800X.


I have definitely found that to be the case. My approach now is to free up 1 core on my machine for the benchmark runs and make sure it doesn't stop BOINCmgr from continuing to run tasks. I am still concerned that results may be influence by what app type is running on the rest of the cores (will tesing AVX be invluence by other cores running SSE42?)
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Message 1912721 - Posted: 13 Jan 2018, 3:49:57 UTC - in response to Message 1912705.  

Guess we should be running the SSE41 app on the BLC05 cpu tasks.

[Its a wash between the r3345 AVX app and the r3711 SSE41 apps. But the r3345 AVX app is 23% faster than the r3712 AVX2 app.


I have confirmed that my actual performance had improved when I switched from AVX to SSE42 as my benchmarks indicated. Probably a good idea to re-validate optimization when WU characteristics change.
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Message 1912722 - Posted: 13 Jan 2018, 3:54:36 UTC - in response to Message 1912631.  

Hi RueiKe!

Message 1896117 on the previous page in this thread.

Perhaps you meant to say "but I can not get to advanced view" here?

Except for that, becomes the same word twice, but still perhaps not the same.


That was so long ago that I can not remember the details of what I was doing. But definitely all of the issues I was having were fixed by Tbar's latest Linux build of BOINCmgr.
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Message 1912729 - Posted: 13 Jan 2018, 4:57:42 UTC - in response to Message 1912705.  
Last modified: 13 Jan 2018, 5:07:48 UTC

Guess we should be running the SSE41 app on the BLC05 cpu tasks

I made few runs in real life with the SSE4.1 and the times almost match the AVX2 times.
About 48 min to crunch a blc05 WU
Not see the differences you are talking about.
Maybe the big gain is a Ryzen thing only.
Can anyone with more knowledge check my host tell me if i'm wrong?
I can't see any real difference between them in my Intel host.
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Message 1912736 - Posted: 13 Jan 2018, 5:37:38 UTC

Thanks for the posts, Rick. I guess I should look at that SSE4.2 app. From my reading, there seemed to be VERY little difference between the capabilities of SSE 4.1 and SSE4.2, only a couple more instruction calls. Wikipedia being my source.
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Message 1912737 - Posted: 13 Jan 2018, 5:40:22 UTC

Juan, it very well could be a "Ryzen thing" .... don't know. Haven't a Intel processor to check things out with. I'm seeing about a 2 minute improvement so far over the AVX2 app with the SSE41 app. Have no idea if the improvement will stick with Arecibo resends or whatever flavor of BLC tasks the splitters cough out next.
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Message 1912739 - Posted: 13 Jan 2018, 5:45:03 UTC - in response to Message 1912737.  
Last modified: 13 Jan 2018, 5:45:23 UTC

Juan, it very well could be a "Ryzen thing" .... don't know. Haven't a Intel processor to check things out with.

AMD have had a lot more time to work on their SSE4.x implementation, compared to AVX and the much more recent AVX2 instruction sets.
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Message 1912740 - Posted: 13 Jan 2018, 5:52:46 UTC

Looks like its time to benchmark the SSE42 app on the BLC05 tasks
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Message 1912869 - Posted: 13 Jan 2018, 20:49:25 UTC - in response to Message 1912740.  

The r3306 SSE42 app was 3% faster than the r3711 SSE41 app on my Ryzen 1800X. Not sure if the difference is worth changing over to. The advantage of any one app can and probably will change depending on the work mix coming from the project. YMMV.

Juan tested the SSE42 app against the SSE41 app on his Intel and the SSE42 app was 10% slower.
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Message 1912877 - Posted: 13 Jan 2018, 21:55:37 UTC - in response to Message 1912869.  
Last modified: 13 Jan 2018, 21:56:04 UTC

The r3306 SSE42 app was 3% faster than the r3711 SSE41 app on my Ryzen 1800X. Not sure if the difference is worth changing over to. The advantage of any one app can and probably will change depending on the work mix coming from the project. YMMV.

Juan tested the SSE42 app against the SSE41 app on his Intel and the SSE42 app was 10% slower.


Thats correct Keith.
There is never just one specific app being fastest on my Lunatics tests because i always test different AR`s and type of WU`s.
So long its just BLC it doesn`t really matter if you use SSE4.1 or SSE4.2 the difference is just a few seconds.
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Message 1912882 - Posted: 13 Jan 2018, 22:55:41 UTC

Juan has tested both SSE4 apps today against the AVX and AVX2 and the SSE4x apps do particularly bad against the AVX2 on his Intel cpu.
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Message boards : Number crunching : ubuntu Install


 
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