Bryant Eadon

For later reference - perf for the 5.15 kernel is not available yet in the apt package manager. linux-perf-5.10 is the latest. A reminder we may want to ping the...

Ok it looks like the perf tool is not available with the 5.15 kernel yet on raspbian. I've pinged the rasbian channel on liberia (IRC). There is a debian package...

It appears that the C driver will only use DMA mode to communicate with SPI when a communication is over 96 bytes -- reference: https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/spi/spi-bcm2835.c#L77 Additional reading - https://iosoft.blog/2020/06/11/fast-data-capture-raspberry-pi/ If...

Interesting -- delay_usecs is used inside spidev, but it's been removed from the kernel ( https://www.spinics.net/lists/kernel/msg3864354.html ). Maybe relevant.

long delay - apologies- working on some life stuff concurrently. -- We might have to grab kernel sources and debug at that level. I believe that the timing issue you...

You rock! I have had a storm of life events. Thank you for bringing this to conclusion!!

Checking in on this old thread -- just skimmed it. Looks like there is a tie-in here between the sampling rate and irregular performance. Is this still an issue now...

I really expect this to work out of the box with the Zero. (Untested, but I could test unless someone else already has?)

Got it. I have a gdb capture of startup that appears to be related to a memcopy. Reading symbols from rtorrent... (No debugging symbols found in rtorrent) [New LWP 2034525]...

The crash appears to be triggered when the disk has been completely filled. I suspect this occurred when there was a change in the file location, from one drive to...