Lost LOGs - increase LOG backend queue size.

RE: Lost LOGs - increase LOG backend queue size.

jacksong — Wed, 08 Jul 2020 08:38:35 GMT

Thank you very much!

This question has been wasted me for two hours until saw your answer

RE: Lost LOGs - increase LOG backend queue size.

Karol D — Mon, 15 Jun 2020 09:54:35 GMT

Ok, I have found the reason, it is this line:

#define NRF_LOG_DEFERRED 0

It has to be changed for:

#define NRF_LOG_DEFERRED 1

Another words - bigger log buffer than 4 bytes can not be sent at once. Thus, you have to enable deferred logger. In my opinion there should be suitable comment in cli example above the lines:

/** @brief Command line interface instance. */
#define CLI_EXAMPLE_LOG_QUEUE_SIZE  (4)

Best regards,

RE: Lost LOGs - increase LOG backend queue size.

Karol D — Mon, 15 Jun 2020 07:34:23 GMT

Hello,
I have the same problem. Is there any known solution which won't affect whole sdk_config.h file?

RE: Lost LOGs - increase LOG backend queue size.

Dusan Daniska — Wed, 21 Mar 2018 14:07:23 GMT

Unfortunately I did not make a backup of the faulty sdk_config at the moment when I found the solution. But I have found something that is causing the same problem, see attached. Hope it helps.

devzone.nordicsemi.com/.../sdk_5F00_config_5F00_dusan.h

RE: Lost LOGs - increase LOG backend queue size.

Jakub Rzeszutko — Tue, 20 Mar 2018 07:03:00 GMT

Hi,

May you please share with us the sdk_config.h file which was causing the problem?

RE: Lost LOGs - increase LOG backend queue size.

Dusan Daniska — Mon, 19 Mar 2018 16:25:59 GMT

I have fixed it. Unfortunately don't know how and why. I just took the sdk_config.h file from the flash_fstorage example and compiled my project. Now everything seems to work fine.

I tried to compare my sdk_config with the one in the flash_fstorage but I failed. This is something what should be improved somehow - the documentation of sdk_config.

RE: Lost LOGs - increase LOG backend queue size.

Dusan Daniska — Mon, 19 Mar 2018 14:30:37 GMT

I have tested several combinations and have found out following: the problematic code is probably the NRF_LOG_HEXDUMP_INFO.

When using this NRF_LOG_HEXDUMP_INFO, I can not increase the queue size and I get the "lost logs" error. If I increase the queue size, the program fails somewhere (I can't see the leds blinking which indicates normal operation).

When I commented ou the NRF_LOG_HEXDUMP_INFO, I could increase the queue size without having the program crash and I do not have the "lost logs" error.

I did not need

Any idea why? Could this some bug in the NRF_LOG_HEXDUMP_INFO?

RE: Lost LOGs - increase LOG backend queue size.

Jakub Rzeszutko — Mon, 19 Mar 2018 14:06:07 GMT

Hi,

I have few additional questions:
1. Do you process nrf_cli in main like in the example?

2. May you try to increase buffers in NRF_CLI_UART_DEF: 64 ->1024 and 16->1024? Does it change anything?

3. Can you share your project? It will be hard to find the problem otherwise.

RE: Lost LOGs - increase LOG backend queue size.

Dusan Daniska — Mon, 19 Mar 2018 13:53:56 GMT

I am initializing the NRF_CLI using this piece of code:

NRF_CLI_CMD_REGISTER(set, NULL, "help string test", cli_cmd_set);
NRF_CLI_UART_DEF(m_cli_uart_transport, 0, 64, 16);
NRF_CLI_DEF(m_cli_uart, "sequoia: ", &m_cli_uart_transport.transport, '\r', 4);

When I increase the "4" in the NRF_CLI_DEF to e.g. "5", the logs start to behave strangely, this is the output:

So even the error log is not complete...

If I increase the value to something greater, e.g. "12", I get this output:

-> I do not see the red error but I can see only first char of the "cli_prefix".

RE: Lost LOGs - increase LOG backend queue size.

Jakub Rzeszutko — Mon, 19 Mar 2018 13:41:22 GMT

Hi Dusan,

I assume you are referring to nrf_cli example.

In the main.c you need to update define: CLI_EXAMPLE_LOG_QUEUE_SIZE used in the macro NRF_CLI_DEF. By default it has value == 4.

You can always run command: cli_stats to check queue usage.

RE: Lost LOGs - increase LOG backend queue size.

Dusan Daniska — Mon, 19 Mar 2018 13:31:58 GMT

I am using CLI with Logger and I can see this in the terminal:

And also I can not see some logs that I am expecting.

RE: Lost LOGs - increase LOG backend queue size.

Jakub Rzeszutko — Mon, 19 Mar 2018 12:48:43 GMT

Hi,

How do you know you are loosing logs?

Do you use CLI with Logger or only Logger module?