RTT overflow??

RE: RTT overflow??

run_ar — Thu, 31 May 2018 12:53:57 GMT

Hex dump would probably look something like this. I think only deferred logging is recommended.

RE: RTT overflow??

Jandyman — Tue, 29 May 2018 05:41:56 GMT

Sorry for the delay. I was working on another deadline. I can't find any real documentation on NRF_LOG_HEXDUMP_INFO. What does the output look like? If I want out like "Tx out: 0f 04 34 ..." do I do one NRF_LOG_INFO for "Tx out: " and follow it with a call to NRF_LOG_INFO? Does NRF_LOG_HEXDUMP_INFO work well with deferred processing?

Also, I've been wondering whether I even need to used deferred log processing. My entire app runs at interrupt low priority, meaning that any important SoftDevice activity will preempt it. If I weren't doing deferred processing I wouldn't need to use NRF_LOG_PUSH

RE: RTT overflow??

Krzysztof Chruscinski — Wed, 09 May 2018 12:01:34 GMT

If you are using NRF_LOG_PUSH to dump hex data then i would recommend to use HEXDUMP macros instead (e.g. NRF_LOG_HEXDUMP_INFO). It requires much less processing. Unfortunately, LOG_PUSH has limitations which are exposed when there is increased logger load and I would not recommend to use it.

RE: RTT overflow??

Jandyman — Tue, 08 May 2018 16:46:51 GMT

I'm using version 12.3.0, so that is not the problem. It's not quite the same symptom either.

RE: RTT overflow??

run_ar — Mon, 07 May 2018 10:37:46 GMT

Which version of SDK 12? if it's pre 12.2 check this issue.

RE: RTT overflow??

Jandyman — Sat, 05 May 2018 02:45:49 GMT

devzone.nordicsemi.com/.../Setpoint-Starter.map

RE: RTT overflow??

Jandyman — Sat, 05 May 2018 02:43:28 GMT

Setting to 2048 doesn't help at all, same symptoms. I can't set to 4096 or I run out of RAM. I tried to figure out how to decrease the stack size to get 636 bytes but is wasn't obvious how to do so. I'm using GNU tools and Eclipse. I'm using SDK12. Even with a sizeof 2048, RTT and logging are chewing up all my memory. I'll try to attach a map file, I'm not exactly sure how to.

RE: RTT overflow??

ketil — Wed, 02 May 2018 08:58:58 GMT

Hi,

Could you try 2048 first and then 4096 if the first does not help?

Ketil

RE: RTT overflow??

Jandyman — Wed, 02 May 2018 07:29:39 GMT

I already increased them, as indicated in the original email. How much more should I increase them?

RE: RTT overflow??

ketil — Wed, 02 May 2018 06:33:14 GMT

Hi,

Which SDK are you using?

Could you try to increase SEGGER_RTT_CONFIG_BUFFER_SIZE_UP and NRF_LOG_DEFERRED_BUFSIZE?

Ketil

RE: RTT overflow??

ketil — Mon, 23 Apr 2018 12:36:59 GMT

Hi,

I'm looking into your question. Will get back to you.

Ketil