Activity
From 03/17/2016 to 04/15/2016
04/15/2016
- 10:06 AM Software Development: RE: High latency for DMTimer interrupt
- Note that the RT linux page also has an Ftrace guide: https://rt.wiki.kernel.org/index.php/Ftrace
- 09:53 AM Software Development: RE: High latency for DMTimer interrupt
- Hi Mary,
Regarding RT Linux I would specifically recommend https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO ...
04/14/2016
- 11:43 PM Software Development: RE: High latency for DMTimer interrupt
- Mary,
Here is a link to the RT Linux Wiki:
https://rt.wiki.kernel.org/index.php/Main_Page
There's a direct lin... - 03:35 PM Software Development: RE: All devices on i2c on the AM335 SOM
- I created a wiki page for this information. Let me know if it answers your question.
[[MitySOM-335x_I2C_Addresses]]
04/13/2016
- Hello,
I am writing some diagnostic software for our device to run through and make sure everything seems to be pr... - 11:09 AM Software Development: RE: High latency for DMTimer interrupt
- Mary Frantz wrote:
> For more information about how the DM Timer works, refer the the AM335x Technical Reference Man... - 10:59 AM Software Development: RE: High latency for DMTimer interrupt
- For more information about how the DM Timer works, refer the the AM335x Technical Reference Manual.
To summarize, ... - 10:09 AM Software Development: RE: High latency for DMTimer interrupt
- Mary Frantz wrote:
> This code:
>
> [...]
>
> prints the value of 'start' (the counter value at the start of t... - 09:48 AM Software Development: RE: High latency for DMTimer interrupt
- This code:...
- 09:28 AM Software Development: RE: High latency for DMTimer interrupt
- Mary Frantz wrote:
> I see this when the printk() call displays the last 16 'start' counter values.
What do you mea... - 08:58 AM Software Development: RE: High latency for DMTimer interrupt
- No, this high latency is rare. Typical is more like 3 usec. I see this when the printk() call displays the last 16 ...
04/12/2016
- 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 ... - I have implemented a timer interrupt in a kernel module. At the start of the isr, it reads the timer value which sho...
04/08/2016
- 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 t... - 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 sour... - 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 fro...
- 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...
- 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
- 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 nan... - 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 pa...
04/06/2016
- 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.
- 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...
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