Search found 107 matches
- Fri Jan 24, 2020 8:42 pm
- Forum: General discussion
- Topic: dhrystone and whetstone benchmarks
- Replies: 93
- Views: 156407
- Fri Jan 24, 2020 8:25 pm
- Forum: Custom design boards
- Topic: Bluepill F4 board, anyone still working on it?
- Replies: 83
- Views: 114812
Re: Bluepill F4 board, anyone still working on it?
And here is the Whetstone.c used above - it has to be ported to stm32duino..
- Fri Jan 24, 2020 7:55 pm
- Forum: Custom design boards
- Topic: Bluepill F4 board, anyone still working on it?
- Replies: 83
- Views: 114812
Re: Bluepill F4 board, anyone still working on it?
For example - here we did Whetstone with 80MHz pic32, double precision, no FPU, running off ram
http://retrobsd.org/viewtopic.php?f=6&t=4065
1.2Mflops DP.
With single and FPU it will not be more that 25Mflops. With M4F @96Mhz -> 30Mflops max.
Here
http://www.roylongbottom.org.uk/Raspberry ...
http://retrobsd.org/viewtopic.php?f=6&t=4065
1.2Mflops DP.
With single and FPU it will not be more that 25Mflops. With M4F @96Mhz -> 30Mflops max.
Here
http://www.roylongbottom.org.uk/Raspberry ...
- Fri Jan 24, 2020 7:22 pm
- Forum: Custom design boards
- Topic: Bluepill F4 board, anyone still working on it?
- Replies: 83
- Views: 114812
Re: Bluepill F4 board, anyone still working on it?
Guys, I wouldn't want to spoil your happiness with the 401/411 boards.. :D
1. there is only 1 FPU on the chip, single precision
2. the MFLOPs we get are numbers which are pretty off the real life, imho.
The Whetstone benchmark has to be reviewed and put into sync with results you may find on some ...
1. there is only 1 FPU on the chip, single precision
2. the MFLOPs we get are numbers which are pretty off the real life, imho.
The Whetstone benchmark has to be reviewed and put into sync with results you may find on some ...
- Fri Jan 10, 2020 3:37 pm
- Forum: General discussion
- Topic: ART accelerator
- Replies: 25
- Views: 28187
- Fri Jan 10, 2020 3:05 pm
- Forum: General discussion
- Topic: ART accelerator
- Replies: 25
- Views: 28187
Re: ART accelerator
Double is aprox 2x slower than single (both hw and sw).
I think we need to consolidate the Whetstone results with reality.
You CANNOT get 237 MegaFLOPS with 168MegaHz Cortex M4 FPU.
Based on the above web page with Whetstone results the ~240 MegaFLOPS is a result of Pentium 4 at 2GHz clock.
I think we need to consolidate the Whetstone results with reality.
You CANNOT get 237 MegaFLOPS with 168MegaHz Cortex M4 FPU.
Based on the above web page with Whetstone results the ~240 MegaFLOPS is a result of Pentium 4 at 2GHz clock.
- Fri Jan 10, 2020 2:41 pm
- Forum: General discussion
- Topic: ART accelerator
- Replies: 25
- Views: 28187
Re: ART accelerator
The ART somehow eliminates the flash access waitstates.
Even theoretically the stuff would run with zero WS, the floating point unit needs 1-14 (1 or 3 or 14) cpu clocks to provide a single precision fp result.
Adding the overhead etc, I would guess the MFLOPs result @168MHz cannot be better than ...
Even theoretically the stuff would run with zero WS, the floating point unit needs 1-14 (1 or 3 or 14) cpu clocks to provide a single precision fp result.
Adding the overhead etc, I would guess the MFLOPs result @168MHz cannot be better than ...
- Fri Jan 10, 2020 2:28 pm
- Forum: General discussion
- Topic: ART accelerator
- Replies: 25
- Views: 28187
Re: ART accelerator
BTW - I doubt the result we see are the Whetstone results :)
We should rather called it "Whetduinos" :P
https://www.st.com/content/ccc/resource/technical/document/application_note/10/6b/dc/ea/5b/6e/47/46/DM00047230.pdf/files/DM00047230.pdf/jcr:content/translations/en.DM00047230.pdf
http://www ...
We should rather called it "Whetduinos" :P
https://www.st.com/content/ccc/resource/technical/document/application_note/10/6b/dc/ea/5b/6e/47/46/DM00047230.pdf/files/DM00047230.pdf/jcr:content/translations/en.DM00047230.pdf
http://www ...
- Fri Jan 10, 2020 1:57 pm
- Forum: Maple & Maple mini etc
- Topic: No COM Port - STM32F103RC8T6
- Replies: 12
- Views: 69292
Re: No COM Port - STM32F103RC8T6
Maple Mini works fine with Roger (under Win7 here).
The installation of those drivers is sometimes laborious (drivers conflicts, several identical drivers in the drivers store, I had to clean it up).
You also must have the bootloader installed (or use stlink), and use Serial.begin in your sketch ...
The installation of those drivers is sometimes laborious (drivers conflicts, several identical drivers in the drivers store, I had to clean it up).
You also must have the bootloader installed (or use stlink), and use Serial.begin in your sketch ...
- Fri Jan 10, 2020 1:36 pm
- Forum: General discussion
- Topic: ART accelerator
- Replies: 25
- Views: 28187
Re: ART accelerator
At 96MHz you have to see 96/84=1.143 speedup..
Like 135Mflops with Art.
Try with 168MHz, I bet it works..
(you should see 236.97 Mflops, xpack 9 compiler, Roger's core, -O3)
Like 135Mflops with Art.
Try with 168MHz, I bet it works..
