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Posts by hoppisaur

1) Message boards : Number crunching : Benchmark thread 1-2019 on - GPU & CPU times wanted for new WUs, old & new hardware! (Message 68953)
Posted 5 Aug 2019 by hoppisaur
Post:
A12-9800 #1 on Ubuntu 18.04 using amdgpu-pro 18.50 opencl=legacy
227.xx = 96.3 seconds from last 13 valids

A12-9800 #2 (latest purchase already killed a motherboard after 3 days!) on Ubuntu 16.04.6 using amdgpu-pro 17.50 opencl=legacy
227.xx = 96.6 seconds for last 20 valids

Both motherboards are set to C6 = disabled, Core performance boost = disabled, Cool'nQuiet = enabled. Both mobos have 2 x 4gb DDR4 2400. Both BOINC clients are set to using 50% of CPUs.

Watching clockspeeds in terminal, clock speed will sit at 1396 across all "cores" and jump up to the 2-3 GHz range briefly when it is offloading from the GPU. Difficult to tell peak clockspeed as time resolution of terminal window is not that fine.
2) Message boards : Number crunching : New Benchmark Thread - times wanted for any hardware, CPU or GPU, old or new! (Message 68098)
Posted 6 Feb 2019 by hoppisaur
Post:

hoppisaur
Ok I'm confused now lol, so previously your AMD A12-9800 APU @4.2 GHz managed a time of 120s, but now it's at 3.8 GHz & managing 101s? You mentioned you tweaked the bios, did you by chance increase the iGPU clock? (if that's possible?).
Sorry to hear about the dead m/brd :(.


Sorry for late response.

Normal freq of chip is 3.8 with capability to boost to 4.2. Main change I made in was to disable C6 as it was freezing when left alone for a while.

If I watch clockspeeds via lscpu, the most it boosts is ~4.0 so call it whatever. AMD CnQ is on because that allows it to drop frequency on the cpu cores to give power to the graphics cores.

It is on a A320 chipset mobo so iGPU is not possible to OC.

The 227s have been in the 100-101 range and the 243s are in the 107-108 range. My computer is visible so verification is available to anyone who wants to see.
3) Message boards : Number crunching : New Benchmark Thread - times wanted for any hardware, CPU or GPU, old or new! (Message 68013)
Posted 15 Jan 2019 by hoppisaur
Post:
Of latest 14 validated 227.62 WUs, avg is 100.65 secs. Chip is at 3.8GHz. I've tweaked BIOS on another board as much as I can. First board died complete with magic smoke. A12-9800 with dual channel DDR4-2400.



Is the 135s time with the CPU at 3.8 GHz with 227.62 WUs? (I'll add that time too if so).

Will link the AT thread again in a moment.
4) Message boards : Number crunching : New Benchmark Thread - times wanted for any hardware, CPU or GPU, old or new! (Message 67962)
Posted 23 Dec 2018 by hoppisaur
Post:
It is trending slower today as I turned off motherboard core boost (3.8 -> 4.2) to see if I am hitting a wall with what the motherboard is able to deliver. 10WU avg is now 135.06. I think my powersupply isn't up to the task of boosting the cpu while the iGPU units are being used. Or it could just be driver or mobo related. I am going to try other hardware as it was frozen this morning (locked up).



Yes, agreed, I think the proximity of the gpu and cpu units is advantageous in an otherwise mediocre chip. Or maybe they share the cache?

Avg (of 5) = 120.33 seconds from the 227.62 WUs

AMD A12-9800 stock; ddr4-2400, onboard (iGPU) R7 graphics

Boinc 7.9.3, Ubuntu 18.04.1 LTS, OpenCL 1.2, amdgpu-pro 18.50 drivers. Only MW@Home running. No CPU tasks. 1 WU at a time.

That seems very fast to me for an APU, since you are getting times comparable to a lot of GPUs (both AMD and Nvidia) that must have much more graphics power, I would think.
So maybe the APU offloads the dual-precision workload to the CPU more efficiently? I really don't know anything about APUs, so maybe someone who does can explain it.
5) Message boards : Number crunching : New Benchmark Thread - times wanted for any hardware, CPU or GPU, old or new! (Message 67960)
Posted 23 Dec 2018 by hoppisaur
Post:
Avg (of 5) = 120.33 seconds from the 227.62 WUs

AMD A12-9800 stock; ddr4-2400, onboard (iGPU) R7 graphics

Boinc 7.9.3, Ubuntu 18.04.1 LTS, OpenCL 1.2, amdgpu-pro 18.50 drivers. Only MW@Home running. No CPU tasks. 1 WU at a time.

Still not 100% stable. Will investigate if power delivery issue or driver issue. Locks up when asked to do too much. Stable if left to crunch.




Average from at least 5 WU times using 227.62 credit WUs only (not cherry picked please! ;)).

A dedicated physical CPU core for each GPU (for optimal MW WU times). If only using BOINC for CPU tasks, & you have an HT capable CPU, then the only way to be certain of this (bar disabling HT) is to set the BOINC computing preferences (in advanced mode>options) so that you have 1 less CPU thread running then you do physical cores. Don't panic too much about lost CPU ppd, it doesn't take long to run MW GPU WUs ;) (see previous table).

Please state what speed & type CPU you have, as it now has a significant affect on GPU WU times!

Please state GPU clock speeds if overclocked(including factory overclocks) or state 'stock'.

Please state whether only crunching 1 WU at a time per GPU, or state how many are run concurrently (I will create a separate table for that).

For CPU times please state whether Hyper Threading (or equivalent) is enabled or not, times for both states welcomed :).

It would also be useful if you could state your BOINC, driver version, & OS, incase it does make any difference.




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