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 1   Optimized Seti@Home apps / Alternate Hardware platforms / Re: OSX Multibeam OpenCL question  on: 27 Oct 2014, 02:04:34 pm 
Started by Joe Fox | Last post by Raistmer
Great! Will wait with interest (and I'm not always available too so no problems, lets catch each other Smiley ).

EDIT: With AP tasks too scarse the need for these builds is great and increases constantly. Share your efforts and issues please, we need to make some breakthrough on this front.

 2   Optimized Seti@Home apps / Alternate Hardware platforms / Re: OSX Multibeam OpenCL question  on: 27 Oct 2014, 01:06:36 pm 
Started by Joe Fox | Last post by Joe Fox
Sorry, I have been on the road for the last week and haven't had a chance to follow up. I'll be able to add the debug code and narrow down the troublesome parameter this week.

Thanks
-Joe

 3   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 03:25:58 pm 
Started by Raistmer | Last post by Raistmer
Yes, it was always the same.

Only -oclFFT_plan 256 8 128 did cure it.


It's the puzzle. I'll try with 2721 on own host.

And regrading CPU - it gave overflow ultimately... but why SO long?...

astropulse_7.03_windows_intelx86__sse.exe  / ap_28jn14aa_B1_P1_00131_20141017_13023.wu :
AppName: astropulse_7.03_windows_intelx86__sse.exe
AppArgs:
TaskName: ap_28jn14aa_B1_P1_00131_20141017_13023.wu
Started at  : 16:17:19.199
Ended at    : 23:17:32.194
Result      : stored as ref for validations.
  25212.541 secs Elapsed
  23937.355 secs CPU time


[ stderr ]
Not using ap_cmdline.txt-file, using commandline options.
16:17:19 (3240): Can't set up shared mem: -1. Will run in standalone mode.

Build features: Non-graphics    BLANKIT TWINDECHIRP     USE_LRINT       FFTW    USE_INCREASED_PRECISION USE_SSE x86
     CPUID: Intel(R) Core(TM)2 Quad  CPU   Q9450  @ 2.66GHz

     Cache: L1=64K L2=6144K

CPU features: FPU TSC PAE CMPXCHG8B APIC SYSENTER MTRR CMOV/CCMP MMX FXSAVE/FXRSTOR SSE SSE2 HT SSE3 SSSE3 SSE4.1
AstroPulse v7 Windows x86 rev 2603, V7 match, by Raistmer with support of Lunatics.kwsn.net team.
SSE
ffa threshold, twindechirp, lrint mods by Joe Segur
state.fold_buf_size_short=65536; state.fold_buf_size_long=262144
Found 30 single pulses and 30 repeating pulses, exiting.
  percent blanked: 4.25

 4   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 03:21:03 pm 
Started by Raistmer | Last post by Mike
Quite possible that this task hides another issues to discover.

For example, I'm running it on Q9450 with SSE app more than 6 hours already... With GPU overflowed results I would expect CPU time no more 10 minutes... Quite possible it will finish w/o overflow at all and then we will have another TestCase for investigation why so.

But excessive memory usage on overflows is separate issue. So please compare results with and w/o oclfft_plan switch - do they the same?

Yes, it was always the same.

Only -oclFFT_plan 256 8 128 did cure it.

 5   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 03:17:00 pm 
Started by Raistmer | Last post by Raistmer
Quite possible that this task hides another issues to discover.

For example, I'm running it on Q9450 with SSE app more than 6 hours already... With GPU overflowed results I would expect CPU time no more 10 minutes... Quite possible it will finish w/o overflow at all and then we will have another TestCase for investigation why so.

But excessive memory usage on overflows is separate issue. So please compare results with and w/o oclfft_plan switch - do they the same?

 6   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 03:07:49 pm 
Started by Raistmer | Last post by Mike
I made an interesting investigation.

Installed win 8.1 and tested the second task 30 times.



Check GPU clock its downclocking and fallback on CPU.



With -oclFFT_plan 256 8 128 memory consumption is normal even with big ffa_block values.
Also you can see memory is freed permanently.

 7   Optimized Seti@Home apps / Alternate Hardware platforms / Re: OSX Multibeam OpenCL question  on: 26 Oct 2014, 02:04:17 pm 
Started by Joe Fox | Last post by Raistmer
So, what was outcome?

 8   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 01:56:59 pm 
Started by Raistmer | Last post by Raistmer
And final modification - variable ffa block size. Now this taks consumes almost usual memory amount even in peak.

If this modification produces correct result for test tasks and overflows it will be released soon.

 9   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 11:51:21 am 
Started by Raistmer | Last post by Raistmer
~200 MB saved from TestCase max by checking if overflow already reached and not allocating more.


 10   Optimized Seti@Home apps / GPU crunching / Re: OpenCL AP v7 memory consumption  on: 26 Oct 2014, 05:44:03 am 
Started by Raistmer | Last post by Raistmer
And here is first results on the improvements path for this area.
This picture should be directly compared with one posted here: http://lunatics.kwsn.net/12-gpu-crunching/opencl-ap-v7-memory-consumption.msg57231.html#msg57231

As one can see now app's memory consumption returns to almost normal state after FFA completion. Hence (though peak memory consumption remained the same for now) time duration when high memory amount allocated to app considerably decreased so probability of 2 or more tasks simultaneously will demand huge amount of memory is considerably decreased too. Hence host HDD swapping or other low system memory effects less likely with new build.

Thanks all who attracted my attention to this issue.


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