RPi performance

I dont always have cpuclock running as I find the icon flickering way too distracting, I only had it running occasionally to keep an eye on cpu temp.

You may be correct in that my single tasking apps were running at low cpu speed (i didnt know that a single tasking prog could be locked to a low speed), but today I cant reproduce this drop in speed.

Kuemmel wrote: P.S.: Is there still no solution to that log in problem to this website ? I constantly have to delete all browers data (using Chrome on Windows 10).

The painless user-solution is to always begin your ROOL session by visiting this page: https://www.riscosopen.org/content/
Log in there and then click on ‘Forum’.
That way there should be no need to delete any browser data before every visit.
Haven’t tested with Chrome but it works fine with Firefox.

@Neil: Thanks for the info…doesn’t work…may be due to Chrome…but I mean the problem must be within the RiscOSOpen page somewhow, or ?

Anyway. Meanwhile I tried to get my RPI4 to power up, also with that Ace4U board. Followed all the instructions as mentioned here before. Just I can’t get any screen to be shown. The red light is constantly on, so I think the power source is okay (5V3A), the green light is kind of blinking, like 4 times, then steady for a bit and repeating that sequence all the time. I use a monitor with a 1920×1200 res. Any clue ?

the green light is kind of blinking, like 4 times, then steady for a bit and repeating that sequence

4 short flashes means “start4.elf not found”.

Full list of LED flash codes here:
https://github.com/raspberrypi/documentation/blob/master/configuration/led_blink_warnings.md

Thanks for that hint. Stupid me, I didn’t follow to the download page from the firmware page from the files, instead I saved them with a right mouse click and it saved not the firmware (file name was correct), but may be the linked webpage :-) Now works fine :-)

One thing I’d like to have performance stats on is the time to print a document to a PDF file using PrintPDF for example. This takes a LONG time for even a short document on a Pi1 (> 5 minutes for even a fairly short file), but much less time on VRPC (it also takes longer than printing an identical document to a PDF file on the same Pi using Raspbian …)

Interestingly the slalom system I am using writes backups to shares on some of the other computers in the network. One of these is VRPC, and receiving files on that is slower, by maybe a factor of 3, than any of the rpis. It’s done with *copy commands over ShareFS.