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by Gerbertus
Tue Oct 01, 2019 2:45 pm
Forum: Raspbian
Topic: How to update from 2019-07 to 2019-09?
Replies: 13
Views: 900

Re: How to update from 2019-07 to 2019-09?

Has something changed here? "apt update; apt dist-upgrade" hasn't normally done the trick of moving to a new Raspbian when the release contains new packages, as it does this time. Won't rpi-eeprom and Mousepad, at the least, be missing?
by Gerbertus
Fri Sep 27, 2019 5:39 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 202233

Re: Raspberry Pi 4 temperature

Will wait until I power it on tonight to see what kind of difference it makes. Overall its a nice case, but I'm not so sure it's worth the premium price tag. Unless you're ordering dozens of cases or more in bulk, $15 is only a premium price tag when compared to the official case. And the official ...
by Gerbertus
Wed Sep 11, 2019 10:49 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 202233

Re: Raspberry Pi 4 temperature

Most people using ARM cores this recent are using smaller processes. If things were things going a little more normally in the fab space I think it would have been right for RPi to jump all the way down to 14nm. Of course the fiascos people have had with sub-14nm processes mean that 14nm is still in...
by Gerbertus
Wed Sep 11, 2019 10:27 pm
Forum: Troubleshooting
Topic: VLI firmware v2.0 - powersaving features enabled
Replies: 114
Views: 18950

Re: VLI firmware v2.0 - powersaving features enabled

I think a few more +1's for success and we put this in the announcements forum. I haven't done any USB speed testing, but my pi4 is working just fine with the new firmware, and the idle temperature dropped from 49-50C to 43C ! This is with a FLIRC case, which is a fairly ideal case for seeing impro...
by Gerbertus
Sun Sep 08, 2019 2:31 am
Forum: Troubleshooting
Topic: VLI firmware v2.0 - powersaving features enabled
Replies: 114
Views: 18950

Re: VLI firmware v2.0 - powersaving features enabled

Shouldn't this be announced in the "Announcements" forum, and possibly on the blog? Stuff gets buried in this subforum really fast.
by Gerbertus
Mon Aug 26, 2019 8:26 pm
Forum: Troubleshooting
Topic: Hardware revision?
Replies: 2
Views: 595

Re: Hardware revision?

Thanks, good to know! Went ahead and grabbed one; looking forward to the performance contrast to my old pi2.
by Gerbertus
Mon Aug 26, 2019 5:46 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 12
Views: 13109

Re: 3B+ BLAS performance etc

BTW in case anyone else is interested: the Mathematica 12 BLAS isn't presently tuned for the Pi4's A72s, but Wolfram has said they'll fix that in a future release.

(See the comments and linear algebra benchmarks on their v12 for Pi announcement.)
by Gerbertus
Mon Aug 26, 2019 5:41 pm
Forum: Troubleshooting
Topic: Hardware revision?
Replies: 2
Views: 595

Hardware revision?

When news outlets reported about the USB-C bug, several said that there will be a future Pi4 hardware revision fixing the bug. When I heard that, I decided to hit the pause button on a Pi4 purchase, in case enough other hardware bugs turned up that I would regret buying the original revision. Most p...
by Gerbertus
Mon May 20, 2019 9:33 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 12
Views: 13109

Re: 3B+ BLAS performance etc

I pulled out my Pi2 for the first time in quite a while, installed the latest Raspbian, and revisited this. Apparently Wolfram figured out how to use a halfway decent BLAS. Linear algebra performance on the Pi2 improved by something around 500% . I'd be very interested to see what the 3B and 3B+ are...
by Gerbertus
Wed Apr 18, 2018 8:53 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 12
Views: 13109

Re: 3B+ BLAS performance etc

jardino- Thanks! Do you have the raw data available? (That's the output of Benchmark[], with '"BenchmarkResult" -> n1, "TotalTime" -> n2, "Results" -> {{"Data Fitting", n3}, {"Digits of Pi", n4}, {"Discrete Fourier Transform", n5}' and so on with times for each.) Eyeballing the graph is made somewha...
by Gerbertus
Tue Apr 17, 2018 8:29 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 12
Views: 13109

Re: 3B+ BLAS performance etc

I'll note that I posted this to the general forum but a moderator moved it here. My question is largely about linear algebra performance in general. There are a vast variety of programs that would benefit from having a well tuned BLAS and not just Mathematica. And though I am asking for the Mathemat...
by Gerbertus
Tue Apr 17, 2018 4:47 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 12
Views: 13109

3B+ BLAS performance etc

Short version: How is linear algebra performance on the Pi 3 B+? Would someone please post the full output of a Mathematica benchmark? (to do that just pull up a terminal and do $ wolfram In[1]:= Needs["Benchmarking`"] In[2]:= Benchmark[] note it'll need your full CPU for around 7 minutes ) Long ver...

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