I noticed a new version of AP for ATI on Mikes site, r2083. I benched it with Clean_01LC.wu against r1843. Run times are nearly identical at 45 sec but the CPU usage has fallen dramatically from 15 sec to 3 sec.

Intriguing. I'll bench some more wu's. I wonder if there is a reason that might happen.

I noticed a new version of AP for ATI on Mikes site, r2083. I benched it with Clean_01LC.wu against r1843. Run times are nearly identical at 45 sec but the CPU usage has fallen dramatically from 15 sec to 3 sec.

Intriguing. I'll bench some more wu's. I wonder if there is a reason that might happen.

I think Raistmer learned some new facts about GPU synching from Oliver Bock at Einstein.

http://einstein.phys.uwm.edu/forum_thread.php?id=10215&nowrap=true#127648

Some more wu's tested, the CPU usage is down by a factors between 3 and 8.


Quick timetable

WU : ap_18se08aa_B6_P1_00046_1LC25.wu
AP6_win_x86_SSE2_OpenCL_ATI_r1843.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 46.817 secs
CPU 16.969 secs
AP6_win_x86_SSE2_OpenCL_ATI_r2083.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 47.014 secs, speedup: -0.42% ratio: 1.00x
CPU 4.563 secs, speedup: 73.11% ratio: 3.72x

WU : Clean_01LC.wu
AP6_win_x86_SSE2_OpenCL_ATI_r1843.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 45.815 secs
CPU 15.563 secs
AP6_win_x86_SSE2_OpenCL_ATI_r2083.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 45.086 secs, speedup: 1.59% ratio: 1.02x
CPU 3.016 secs, speedup: 80.62% ratio: 5.16x

WU : Clean_20LC.wu
AP6_win_x86_SSE2_OpenCL_ATI_r1843.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 843.815 secs
CPU 282.313 secs
AP6_win_x86_SSE2_OpenCL_ATI_r2083.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 847.676 secs, speedup: -0.46% ratio: 1.00x
CPU 33.953 secs, speedup: 87.97% ratio: 8.31x

WU : short_ap_21oc08ab_B2_P0_00081_20081130_08605.wu
AP6_win_x86_SSE2_OpenCL_ATI_r1843.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 37.058 secs
CPU 7.109 secs
AP6_win_x86_SSE2_OpenCL_ATI_r2083.exe -unroll 10 -ffa_block 2048 -ffa_block_fetch 1024 :
Elapsed 37.033 secs, speedup: 0.07% ratio: 1.00x
CPU 2.406 secs, speedup: 66.16% ratio: 2.95x

Apparently this is my idea of a good time on Saturday nights now...

Apparently this is my idea of a good time on Saturday nights now...

Sad, I'm going over to neighbor's house for a cocktail.

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Sad, I'm going over to neighbor's house for a cocktail.

I had dinner at a sports bar with my 9 year old son. A wild and crazy time was had by...nobody.

:)

I noticed a new version of AP for ATI on Mikes site, r2083. I benched it with Clean_01LC.wu against r1843. Run times are nearly identical at 45 sec but the CPU usage has fallen dramatically from 15 sec to 3 sec.

Intriguing. I'll bench some more wu's. I wonder if there is a reason that might happen.

I think Raistmer learned some new facts about GPU synching from Oliver Bock at Einstein.

http://einstein.phys.uwm.edu/forum_thread.php?id=10215&nowrap=true#127648

And I think that TWIN_FFA mod does its work. Conversation about synching led to quite paradoxal result in TOTAL synching for Intel GPU build, ATi build untouched.

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SETI apps news
We're not gonna fight them. We're gonna transcend them.

@Richard
From your link (I started to worry if I forgot something indeed?) :

Looks like AMD SDK vs Intel SDK doesn't matter for CPU consumption. But what really matters is the synching style. When each runtime call followed by clFinish CPU usage drops considerably. So, synching on blocking read not the same as synching on clFinish for intel (and i suspect for NV too) GPU. AMD GPUs don't affected.

Perhaps, you are too optimistic in what that conversation (though very useful indeed) could do :D

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SETI apps news
We're not gonna fight them. We're gonna transcend them.

Did i miss something?
Is there anywhere an AP6 r2083 (or later) version for Nvidia available?
I only got AP6 r2058 running.

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Aloha, Uli

Did i miss something?
Is there anywhere an AP6 r2083 (or later) version for Nvidia available?
I only got AP6 r2058 running.

Not yet.
We are working on new builds.
After additinal testing i will make them available.

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With each crime and every kindness we birth our future.

Did i miss something?
Is there anywhere an AP6 r2083 (or later) version for Nvidia available?
I only got AP6 r2058 running.

Not yet.
We are working on new builds.
After additinal testing i will make them available.

We are up around r2167 currently, I am running a r2165 build on my 2 GPU's.

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