I'm using the Lunatics apps and I started messing with the app_info.xml file after reading a post on this board and monitoring GPU usage using GPU-Z. At first I only modified the MB task to allow it to run 2 tasks at once since it seemed I was only using ~30% of the GPU most of the time. That worked great. Now I crunch 2 MB ATI tasks at a time and use ~70% of the GPU. I just modified my app_info.xml to allow 2 AP WU's to run at a time after monitoring with GPU-Z. I'm still playing with it to see how that goes. My question is, what other things can I do to tune tasks with? I searched the Lunatics site and didn't really find anything. I also haven't really found anything on this board. I see that there are command line arguments that you can give to the task. I think my ATI card is maxed out at 2 concurrent tasks, so now I'm looking for sage advice on what else I can do, in essence tuning guidelines. Here's a snippet of my app_info file and you can see we also have things like unroll, ffa_block and ffa_block_fetch that can be modified. Suggestions?

Doug
<app_version>
<app_name>astropulse_v505</app_name>
<version_num>506</version_num>
<avg_ncpus>0.04</avg_ncpus>
<max_ncpus>0.2</max_ncpus>
<platform>windows_intelx86</platform>
<plan_class>ati13ati</plan_class>
<cmdline>-instances_per_device 2 -unroll 6 -ffa_block 4096 -ffa_block_fetch 2048</cmdline>
<coproc>
<type>ATI</type>
<count>0.5</count>
</coproc>
<file_ref>
<file_name>ap_5.06_win_x86_SSE2_OpenCL_ATI_r521.exe</file_name>
<main_program/>
</file_ref>
<file_ref>
<file_name>AstroPulse_Kernels_r521.cl</file_name>
<copy_file/>
</file_ref>
</app_version>

I'm not running any ATI cards, but you could do a forum search for 'unroll' and check some other posts for some possible hints.

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"Freedom is just Chaos, with better lighting." Alan Dean Foster

I will do that. I'm also curious about setting the <count>x</count> to .75 since AP, true to its name, seems to pulse the GPU. I guess I'm limiting those pulses by using x=.5. Make sense?

Doug

[ADDED]
These 2 things, have nothing todo, with each other and is the way the app.
uses the GPU(s), except the loading and unloading by CPU, the GPU load is variable.
[color=green]
By Fine-Tuning these UNROLL(2 -18)? and ffa_block & fetch: 4096/10240 &
2048/5120, as I tried, also.[color]
By the way, I can't use GPUz anymore, cause it tells rubbish, 2 GPUs, using (CROSS-FIRE) when displaying something, but act as 2x 1GPU when 'crunching'.
But CPUz (0.53/54/55) all give 100% load for the 1st GPU (Load or Not!) and the
2nd gives a more realistic reading and shows the actual load, atleast I hope!
(Maybe someone noticed this behavior on DUAL-GPU-CARDs)?

With <count>1</count>, you instuct to use the whole GPU, <count>0.5</count>,
you 'instruct' the GPU the use half, so 2 can be run.?! Do I say this right?

With UNROLL, ffa_block & ffa_block_fetch, you can overule defaults and try
what's best for your GPU(s). Take a look at results and the one from your wingmen/womem, or other hosts, running ATI and OpenCL.

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First of all, try putting the unrolled value to 10, that was what I was running on my GTX460 and HD5770 (before the HD failed).

Claggy

I'll try setting unroll to 10 on my next test. What does unroll mean? I can't find an explanation of it anywhere.

Doug

I'll try setting unroll to 10 on my next test. What does unroll mean? I can't find an explanation of it anywhere.

Doug

You might want to have a read in the Let's talk about ATI AP -unroll, -ffa_block, and -ffa_block_fetch thread. It explains what the values mean & has the data from several test attempts from various people.

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I completely missed that message thread. I guess others have been down this road before. Thanks.

Doug