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by pica200
Wed Mar 11, 2020 2:31 pm
Forum: General discussion
Topic: I am thinking my new 4GB Pi4 might be counterfeit
Replies: 7
Views: 1023

Re: I am thinking my new 4GB Pi4 might be counterfeit

Counterfeits don't exist. They could not even get the SoC from Broadcom. And yeah, the USB-C port is a bit of a wiggly fit (with the official USB-C power supply) but it's fine in my opinion. The micro HDMI ports are both perfect fits here. But there are tolerances on both the ports and plugs so resu...
by pica200
Wed Mar 11, 2020 1:53 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

It seems broadly pointless, and definitely not RISC. ARM doesn't have a strlen() instruction (unlike x86); I'm not sure why it needs to have an instruction to do something I've never needed to do. I've subsequently been advised that it has some significant uses in crypto, but it still seems niche t...
by pica200
Tue Mar 10, 2020 10:59 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

Just saying. That was not an insult to the work of RPiT. Vanilla Debian repos are slow to get updates so it may not be as up -to-date as Raspbian and lacks some improvements as a result.
by pica200
Tue Mar 10, 2020 7:33 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

Regarding x86_64/AMD64: Yes, i'm talking about the hardware here. The silicon. It needs silly amounts of transistors and still has the legacy bloat from the x86 days in silicon. They can't just remove anything like ARM does for compatibility reasons so they have to keep stacking the steaming piles o...
by pica200
Tue Mar 10, 2020 10:55 am
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

And yet x86_64/AMD64 is still pure bloat. Eventually Intel and AMD will hit the physical limits (we are already pretty close) where the only improvements will be better CPU designs and more cores. That's when ARM and RISC-V will shine because they are fresh designs without any of the legacy bloat.
by pica200
Sun Mar 08, 2020 7:58 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

@chwe
Well then. You seem to know how to maintain images and make sure the packages on the repos work. Make us a fully working 64 bit, Debian based Raspbian image and make sure it's as stable as the official one ;)
by pica200
Sat Mar 07, 2020 4:22 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

why? you simply can deliver 2 images, one 32bit supporting everything and one image 64bit supporting RPi3 upwards (and for the simplicity, I assume you don't support those RPi2 with the 64bit SoC with a 64bit OS too). Because more effort. Trust me, i would love a full 64 bits kernel and userland Ra...
by pica200
Sat Mar 07, 2020 4:03 pm
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 2431

Re: RPi 4 heat sink

Or it's not updating fast enough. It responds quickly but you will not see it until the GUI or the reading in the terminal updates.

And yeah, more fine grained frequency/voltage is one of the reasons it runs cooler now.
by pica200
Fri Mar 06, 2020 6:33 pm
Forum: General discussion
Topic: RPi Benchmarks: 32- Vs 64-bits article on HaD
Replies: 59
Views: 4609

Re: RPi Benchmarks: 32- Vs 64-bits article on HaD

Nah, the alignment requirements (of the CPU) are pretty much the same as AArch32. The biggest hit are the pointers which are all (essentially) 64 bits which doubles size and it can change alignment of structures they are stored in wasting bytes (worst case). The improved instruction set seems to cou...
by pica200
Fri Mar 06, 2020 6:17 pm
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 2431

Re: RPi 4 heat sink

A 1 second load is nothing ;) The temperature rises pretty slowly thanks to the heatspreader and the PCB acting as small heatsink. Try something like watching YouTube videos and it will sweat more. But you will still be well below throttling.
by pica200
Sat Feb 29, 2020 11:33 am
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 2431

Re: RPi 4 heat sink

With these benchmarks abovs keep in mind it's not 100% stable with clocks higher ~1800 MHz or over_voltage higher than 2. It just can't deliver the needed peak power in a few edge cases (but works for almost everything).
by pica200
Fri Feb 28, 2020 2:26 pm
Forum: General discussion
Topic: latest rpi-update 2.5ghz with 4B 4g
Replies: 47
Views: 10041

Re: latest rpi-update 2.5ghz with 4B 4g

I don't know about arm_freq but all GPU clocks except core are not limited anymore. See this and other posts on this closed issue: https://github.com/raspberrypi/firmware/issues/1290#issuecomment-582425626 Be careful because the GPU is sometimes not as stable as it seems. It will start freezing rand...
by pica200
Fri Feb 28, 2020 12:38 pm
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 2431

Re: RPi 4 heat sink

Usually you don't need a heatsink or fan anymore because temps are down thanks to many firmware updates. But it depends on what you are doing with your Pi 4. If you run it all day on full load it can still run very hot and a heatsink will reduce throttling. For normal loads you can save yourself the...
by pica200
Sun Feb 23, 2020 4:50 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 357
Views: 158385

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

You will not be disappointed. It's pretty much stable (officially not of course) apart from few driver edge cases.
by pica200
Sat Feb 22, 2020 9:03 pm
Forum: General discussion
Topic: What is a good replacement for Etcher (ads and ignores privacy)
Replies: 143
Views: 18675

Re: What is a good replacement for Etcher (ads and ignores privacy)

That's your choice. Reminds me of "I have nothing to hide.".

I don't think they need most of the data it phones home. The ads are not so much of a problem.
by pica200
Sat Feb 22, 2020 4:17 pm
Forum: General discussion
Topic: What is a good replacement for Etcher (ads and ignores privacy)
Replies: 143
Views: 18675

Re: What is a good replacement for Etcher (ads and ignores privacy)

That doesn't really matter. It will pre-read blocks in advance as long as you don't tell it not to. So it will keep the destination device busy. You can try it yourself. You will see there is not a huge difference between 128 KiB and 1 or 4 MiB ;) The later is what i usually use for block sizes and ...
by pica200
Sat Feb 22, 2020 12:35 pm
Forum: General discussion
Topic: What is a good replacement for Etcher (ads and ignores privacy)
Replies: 143
Views: 18675

Re: What is a good replacement for Etcher (ads and ignores privacy)

I prefer dd over cp/cat because you can control the block size. NAND flash has large pages these days so it's a good idea to write in blocks a multiple of the page size. It's faster and causes less wear.
by pica200
Fri Feb 21, 2020 12:33 pm
Forum: Gentoo
Topic: How to setup Dolphin on a Pi 4 with Gentoo64 and latest Mesa
Replies: 1
Views: 987

Re: How to setup Dolphin on a Pi 4 with Raspbian Buster

Yes, because the GPU driver is still not fully optimized + no Vulkan support. The real game changer will be Vulkan. I saw what it can do for my potato Intel GPU compared with OpenGL and we will probably see a nice boost for GPU intensive games when Vulkan is ready and optimized. The new overclocking...
by pica200
Fri Feb 21, 2020 12:17 pm
Forum: General discussion
Topic: Of canaries and backdoors
Replies: 15
Views: 1336

Re: Of canaries and backdoors

Don't you think someone who wants access to your Pi would go the easy route exploiting some Linux vulnerability to escalate privileges and then installing spyware? Not saying a backdoor in for example the WiFi module firmware doesn't have advantages but there are so many other ways not involving sec...
by pica200
Mon Feb 17, 2020 8:25 pm
Forum: General discussion
Topic: What is a good replacement for Etcher (ads and ignores privacy)
Replies: 143
Views: 18675

Re: What is a good replacement for Etcher (ads and ignores privacy)

Did you test it directly after you got it? If no then you can't be sure it's a good one. There are sellers which mix original and fake cards either accidentally or on purpose.

Or the card is just worn out and corrupts data.
by pica200
Mon Feb 17, 2020 8:16 pm
Forum: General discussion
Topic: USB image writer
Replies: 193
Views: 20100

Re: USB image writer

would be proper fake testing using the code from f3 . Maybe not by default but as an option. See this and my post below it: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=252758&p=1612817#p1612782 That project has nothing to do with imaging. It is a flash device tester, while USBImager is ...
by pica200
Sun Feb 16, 2020 10:22 pm
Forum: General discussion
Topic: USB image writer
Replies: 193
Views: 20100

Re: USB image writer

Something that would make your image writer stand out of all the others would be proper fake testing using the code from f3. Maybe not by default but as an option.

See this and my post below it:
viewtopic.php?f=63&t=252758&p=1612817#p1612782
by pica200
Sun Feb 16, 2020 9:59 pm
Forum: General discussion
Topic: What is a good replacement for Etcher (ads and ignores privacy)
Replies: 143
Views: 18675

Re: What is a good replacement for Etcher (ads and ignores privacy)

Etcher can only verify the image has been written correctly. It doesn't verify unused space and there are quite clever fake microSDs out there which use caches and other techniques to pass basic checks but h2testw or f3 will always detect them.
by pica200
Sat Feb 15, 2020 12:12 pm
Forum: Troubleshooting
Topic: Issues since kernel got updated to 4.19.93
Replies: 162
Views: 21081

Re: Issues since kernel got updated to 4.19.93

Sounds like silicon lotery didn't go very well for you and the latest firmware made it a bit worse. The only thing i can think of you still can try is getting the official USB-C power supply if you don't already use it. It's cheap and gives very good results for many people. And yes, the power suppl...
by pica200
Sat Feb 15, 2020 11:19 am
Forum: Troubleshooting
Topic: Issues since kernel got updated to 4.19.93
Replies: 162
Views: 21081

Re: Issues since kernel got updated to 4.19.93

Rock solid is debatable. Maybe go down to over_voltage=4 if your silicon allows it. I didn't notice any crashes after around 1h use. Are you sure it's reproduceable and not just bad luck?

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