Activity
From 03/14/2016 to 04/12/2016
04/12/2016
- GG 02:25 PM Software Development: RE: High latency for DMTimer interrupt
- Hi Mary,
You mentioned that your maximum latency is ~500 usec. Is this maximum a rare or common occurrence? What is your average latency?
One utility that might be helpful in figuring out what is going on is ftrace (https://www.k... - I have implemented a timer interrupt in a kernel module. At the start of the isr, it reads the timer value which should be close to the load register value. I am measuring the latency as the difference between the auto-reload value and ...
04/08/2016
- JC 04:24 PM Software Development: RE: Building an SD Card
- Tom Tatakis wrote:
> This is a custom board- I did move the init of mmc back to the early init stage as a test and the file system came up and booted successfully. So that was indeed the issue.
Okay thats good.
> ...
Looks like yo... - JC 04:21 PM Software Development: RE: Building an SD Card
- Tom,
We are working on a yocto filesystem release which allows you to build a new yocto based filesystem from source. Would you be interested in this? - TT 03:52 PM Software Development: RE: Building an SD Card
- Actually I do have a question- do you have a pointer to documentation that tells me how to build an SD card image from scratch? I went looking for this at the beginning of this process and could not find anything.
Thanks again.
- TT 03:50 PM Software Development: RE: Building an SD Card
- This is a custom board- I did move the init of mmc back to the early init stage as a test and the file system came up and booted successfully. So that was indeed the issue. Now I have another problem I need to solve. Our goal is to h...
- BD 02:08 PM Software Development: RE: Building an SD Card
- Tom, one more question: are you running this on a Critical Link Development Board or your own custom baseboard?
04/07/2016
- JC 09:57 AM Software Development: RE: Building an SD Card
- Looking at the logs here are a few things I see.
* On the sd card boots, you are still loading u-boot from the nand. This is okay as long as you know its happening and aren't lost when you try to update the u-boot on the sd card and ... - TT 09:02 AM Software Development: RE: Building an SD Card
- Thanks for the reply- of course now the symptoms have changed. The bad boot now stops waiting for the file system partition. Although at least this gives me something to work with and track down I've attached the 3 logs in case you see...
04/06/2016
- JC 02:36 PM Software Development: RE: Building an SD Card
- Actually 3 logs. The two sd card boot logs and the nand boot log with the new kernel.
- JC 02:34 PM Software Development: RE: Building an SD Card
- Tom,
Could you include the full boot log of the working and the broken boots? - Hello- First, I have a working SD card that boots that I have been using for over a year. I also have a newer kernel that I have built that runs when I burn it into the NAND. I want to upgrade the SD card to use this new uImage. I cop...