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by tkaiser
Thu Mar 29, 2018 3:44 pm
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

Greater than 300 Mbit speeds both up and down using a gigabit USB dongle on a non-Pi computer with no retransmitted packets was also reported earlier on this thread, but I can't find that post anymore. The post got censored by one of the moderators as usual. If you want to tell your users 200 Mbits...
by tkaiser
Mon Mar 26, 2018 11:11 am
Forum: General discussion
Topic: SOLVED: Raspberry Pi 3 Model B+ Will Not Boot!
Replies: 20
Views: 63667

Re: SOLVED: Raspberry Pi 3 Model B+ Will Not Boot!

All is working now :geek: Which is more or less the result of an updated ThreadX contained in the raspberrypi-bootloader package and not the raspberrypi-kernel package (the latter is important too of course since otherwise network won't function) ThreadX is just a bunch of files on the FAT partitio...
by tkaiser
Mon Mar 26, 2018 10:59 am
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

Problem seems to appear on ISP asimetric connections mine is 200/20 and HermannSW have 400/20? I really don't know what you're doing with this speedtest thing. Again: https://www.performancevision.com/blog/network-performance-links-between-latency-throughput-and-packet-loss/ If you have retransmits...
by tkaiser
Mon Mar 26, 2018 10:01 am
Forum: Other
Topic: Ubuntu image for the new Raspberry Pi 3 B+
Replies: 169
Views: 165975

Re: Ubuntu image for the new Raspberry Pi 3 B+

washy wrote:
Mon Mar 26, 2018 9:41 am
See 'systemctl status systemd-modules-load.service' for details
What about doing exactly that and posting the output in a code block here? Uploading dmesg to an online pasteboard service would be a good idea too:

Code: Select all

dmesg | curl -F 'f:1=<-' http://ix.io
by tkaiser
Mon Mar 26, 2018 9:51 am
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

I have a 5v 3amp supply and a 5.25v 2.4amp supply and they're both more than enough to power a Raspberry Pi 3 B+. Why/how should amperage ratings of 3A or 2.4A matter when we're talking about Micro USB? https://uk.rs-online.com/web/c/connectors/usb-d-sub-computing-connectors/micro-usb-connectors/ 6...
by tkaiser
Mon Mar 26, 2018 9:04 am
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

But youtube performance on chromium is better on RPi3B+. Can we please focus on Raspberry Pi Ethernet problem here? You're the one running in retransmits in one direction. You can reproduce this easily. So it would be great if you could help nailing the problem down. Trying out whether EEE is invol...
by tkaiser
Mon Mar 26, 2018 8:03 am
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

This is what I use, 20AWg power lines for $3 each at most (but you have to buy at least 3). https://www.amazon.com/gp/product/B018IAXUAA Yeah, I ordered a bunch of those too. Only way to power those SBC I have that unfortunately use Micro USB for DC-IN. With average Micro USB cables and their 28 AW...
by tkaiser
Sun Mar 25, 2018 7:20 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 62550

Re: 64-bit operating system

timrowledge wrote:
Sun Mar 25, 2018 7:11 pm
Not sure why I keep seeing assertions that 64bit code is bigger.
Have you seen this: https://github.com/nodesource/distribut ... -290440706 ?
by tkaiser
Sun Mar 25, 2018 5:25 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 62550

Re: 64-bit operating system

It would be interesting to see the result of sysbench compiled for 32-bit ARMv8, which most Pi's run now. Rather useless: https://forum.armbian.com/topic/1748-sbc-consumptionperformance-comparisons/?page=2 It's a compiler and not a CPU benchmark so therefore Raspbian ARMv6 binary performs better th...
by tkaiser
Sun Mar 25, 2018 5:13 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 62550

Re: 64-bit operating system

Any compute-bound program that makes heavy use of 64-bit integers will show significantly better performance in 64-bit mode. Not all, see the C-Ray test results and explanation: https://libre.computer/2018/03/21/raspberry-pi-3-model-b-review-and-comparison/ 3 different Cortex-A53 SoCs, all clocked ...
by tkaiser
Sun Mar 25, 2018 5:00 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 62550

Re: 64-bit operating system

ejolson wrote:
Tue Mar 20, 2018 4:53 pm
ShiftPlusOne wrote:
Tue Mar 20, 2018 2:55 pm
Out of curiosity, where is this 15% number coming from?
I don't know about 15 percent, but sysbench on a Pi takes about 126 seconds in 32-bit mode compared to 8 seconds in 64-bit
Don't you think that is the result of ARMv8 vs. ARMv6 and not 64-bit vs. 32-bit in this case?
by tkaiser
Sun Mar 25, 2018 4:57 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 350
Views: 62550

Re: 64-bit operating system

There is something odd about ARM addressing, or its memory mapped IO, that requires a 64-bit OS when moving to 2GB Still not true as already explained: https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=192321#p1281326 Those other 64-bit ARM thingies usually combine a 64-bit kernel with a 32-b...
by tkaiser
Sun Mar 25, 2018 4:41 pm
Forum: Other
Topic: Ubuntu image for the new Raspberry Pi 3 B+
Replies: 169
Views: 165975

Re: Ubuntu image for the new Raspberry Pi 3 B+

bootcode.bin, fixup.dat, start.elf, bcm2710-rpi-3-b-plus.dtb , kernel.img, kernel7.img I then copied these 2 folders into the root partition in the /lib/modules folder: 4.9.80-v7+ and 4.9.80+ You neither need kernel.img nor the '4.9.80+' directory (ARMv6 stuff) but you want to add the new wireless ...
by tkaiser
Sun Mar 25, 2018 4:28 pm
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

Yes in both directions.Tested now. Thank you! :) Just remembered we ( Armbian ) had recently an EEE related issue with one board so it might be worth a try to disable EEE on your Pi. I don't know whether you can control this from a running installation (eg. using ethtool or mii-tool) but it should ...
by tkaiser
Sun Mar 25, 2018 4:05 pm
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

RPIgoodSBC wrote:
Sun Mar 25, 2018 3:39 pm
My tinkerboard on same net on same port with same cable have 930 Mbits/sec on iperf3 and 0 lost packets.
In both directions? With iperf3 you set up one side as server and can test for both directions on the other machine: -R reverts the direction.
by tkaiser
Sun Mar 25, 2018 4:02 pm
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

the problems you are quoting are NOT related to contact resistance of the microUSB cable, but are related to the thickness of the wires of the microUSB cable . Even users with official RPi 3 PSU are affected: https://github.com/bamarni/pi64/issues/66#issuecomment-374950032 but I agree that's usuall...
by tkaiser
Sun Mar 25, 2018 3:25 pm
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

Seriously: What is the highest consumption you've seen with a Pi so far? Me not more than 9W drawn from the wall. Measuring the power "at the wall" is meaningless. You're adding in any lack of efficiency of the PSU itself. You need to measure your total power at the Pi. When I measure 9W "at the wa...
by tkaiser
Sun Mar 25, 2018 3:17 pm
Forum: General discussion
Topic: RPi 3B+ gigabit ethernet bad download speeds.
Replies: 192
Views: 55906

Re: RPi 3B+ gigabit ethernet bad download speeds.

Sorry, I'm tired of testing iperf. Great choice since it will prevent you from understanding the problem (packet loss occuring in one direction). This is how it should look like in a LAN (0 retransmits and iperf3 numbers above 300 Mbits/sec): https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=...
by tkaiser
Sun Mar 18, 2018 2:48 pm
Forum: General discussion
Topic: Find Wifi Hardware on 3B+
Replies: 16
Views: 2811

Re: Find Wifi Hardware on 3B+

ok, then let us update the drivers only :D It's not (just) drivers it's also device tree definitions and firmware support for the new hardware. One possible way might to use apt pinning to get the relevant packages updated containing firmware, kernel image and .dtb files): https://www.raspberrypi.o...
by tkaiser
Sun Mar 18, 2018 2:16 pm
Forum: General discussion
Topic: (Old and now obsolete) REVIEW: X850 mSATA SSD storage expansion board
Replies: 112
Views: 50714

Re: REVIEW: X850 mSATA SSD storage expansion board

f0rd0prefect wrote:
Sun Mar 18, 2018 2:00 pm
The reboot issue is known at least since Oct '17
As already mentioned the latest firmware upgrade should fix this but it does not (for me). That's why we developed a script handler. Should work in Raspbian as well: https://wiki.odroid.com/odroid-xu4/trou ... own_script
by tkaiser
Sun Mar 18, 2018 1:42 pm
Forum: General discussion
Topic: (Old and now obsolete) REVIEW: X850 mSATA SSD storage expansion board
Replies: 112
Views: 50714

Re: REVIEW: X850 mSATA SSD storage expansion board

I don't want to brick my adapter using firmware from unknown sources. The source is JMicron of course. I got new beta firmwares from them directly, through Hardkernel and also Pine64 founder (who established contact between JMicron and community). Now the latest firmware with some fixes is publicly...
by tkaiser
Sun Mar 18, 2018 1:33 pm
Forum: General discussion
Topic: BCM2837B0 and ARMv8 Crypto Extensions
Replies: 14
Views: 5392

Re: BCM2837B0 and ARMv8 Crypto Extensions

memory bandwidth Since mentioning this... it's not always about bandwidth but often also about latency. A good way to check in detail is https://github.com/ssvb/tinymembench Results look then like this for example: https://github.com/ssvb/tinymembench/wiki/Raspberry-Pi-2-(BCM2836) (but comparing ol...
by tkaiser
Sun Mar 18, 2018 1:20 pm
Forum: General discussion
Topic: BCM2837B0 and ARMv8 Crypto Extensions
Replies: 14
Views: 5392

Re: BCM2837B0 and ARMv8 Crypto Extensions

Comparing my results to your older Pi3B results Thanks a bunch. Yes, that's the exepected difference between running a Pi 3 B without under-voltage vs. a Pi 3 B+ also without under-voltage. It's 1200 MHz vs. 1400 MHz but since memory bandwidth is also important it's not a 17% percentage speed bump ...
by tkaiser
Sun Mar 18, 2018 12:57 pm
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

Ergo I expect my supplies putting out 5.2V are just fine. If you provide 5.2V at the PSU and then try to draw 9W (5V/1.8A) from the RPi (using an external disk for example with CPU loads you can't do this since frequency capping reducing consumption greatly once input voltage drops below 4.65V) whi...
by tkaiser
Sun Mar 18, 2018 12:32 pm
Forum: General discussion
Topic: Micro USB for powering PI is no longer OK
Replies: 63
Views: 10063

Re: Micro USB for powering PI is no longer OK

You may note that that document is dated 2007. Here's one from 2012 You can't fix a specification by using another totally irrelevant. USB PD (power delivery) is a new and great spec that deals with higher amperage ratings and even defines higher voltages since 5V is a joke with high currents since...

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