fds_record_update sometimes always returns FDS_ERR_NO_SPACE_IN_FLASH

[Haruki Kawakami]

Hi,

I'm using FDS instead of pstorage. FDS version is SDK13.0.0. fds_record_update sometimes always returns FDS_ERR_NO_SPACE_IN_FLASH though I call fds_gc after it gets FDS_ERR_NO_SPACE_IN_FLASH every time.

static void fds_evt_handler(fds_evt_t const * const p_fds_evt)
{
    if (p_fds_evt->result != FDS_SUCCESS) {
        NRF_LOG_RAW_INFO("FDS_FAILURE %d\r\n", p_fds_evt->result);
        return;
    }

    switch (p_fds_evt->id)
    {
        case FDS_EVT_INIT:
            NRF_LOG_RAW_INFO("FDS_EVT_INIT\r\n");
            m_fstorage_operating = false;
            break;
        case FDS_EVT_WRITE:
            NRF_LOG_RAW_INFO("FDS_EVT_WRITE\r\n");
            m_fstorage_operating = false;
            break;
        case FDS_EVT_UPDATE:
            NRF_LOG_RAW_INFO("FDS_EVT_UPDATE\r\n");
            m_fstorage_operating = false;
            break;
        case FDS_EVT_DEL_RECORD:
           NRF_LOG_RAW_INFO("FDS_EVT_DEL_RECORD\r\n");
            m_fstorage_operating = false;
            break; 
        case FDS_EVT_DEL_FILE:
            NRF_LOG_RAW_INFO("FDS_EVT_DEL_FILE\r\n");
            m_fstorage_operating = false;
            break;
        case FDS_EVT_GC:
            NRF_LOG_RAW_INFO("FDS_EVT_GC\r\n");
            m_fstorage_operating = false;
        default:
            break;
    }
    NRF_LOG_FLUSH();

}

void sf_fstorage_garbage_collection()
{
    ret_code_t ret;
    m_fstorage_operating = true;

    NRF_LOG_RAW_INFO("sf_fstorage_garbage_collection\r\n");
    ret = fds_gc();
    if (ret != FDS_SUCCESS) {
        NRF_LOG_RAW_INFO("fds_gc error ret %d \r\n", ret);
    }

    while(m_fstorage_operating) {
        uint32_t err_code = sd_app_evt_wait();
        app_sched_execute();
        APP_ERROR_CHECK(err_code);
    }
    NRF_LOG_RAW_INFO("fds_gc success \r\n");
    NRF_LOG_FLUSH();
}

static void sf_print_fds_stat()
{
    fds_stat_t p_stat;
    fds_stat(&p_stat);
    _print_info("open_records   : %d\r\n", p_stat.open_records);
    _print_info("valid_records:    %d\r\n", p_stat.valid_records);
    _print_info("dirty_records:    %d\r\n", p_stat.dirty_records);
    _print_info("words_reserved: %d\r\n", p_stat.words_reserved);
    _print_info("words_used      : %d\r\n", p_stat.words_used);
    _print_info("largest_contig   : %d\r\n", p_stat.largest_contig);
    _print_info("freeable_words  : %d\r\n", p_stat.freeable_words);
}

void update_data(void)
{
 　ret_code_t ret = fds_record_update(p_record_desc, &record);
 　NRF_LOG_RAW_INFO("update already exist record. %d \r\n", p_record_desc->record_id);
    sf_print_fds_stat();
 　while(ret == FDS_ERR_NO_SPACE_IN_FLASH)
 　{
      　 NRF_LOG_RAW_INFO("RUN GARBAGE COLLECTION\r\n");
   　    sf_fstorage_garbage_collection();
          sf_print_fds_stat();
      　 m_fstorage_operating = true;
       　ret = fds_record_update(p_record_desc, &record);
          sf_print_fds_stat();
 　 }
}

It makes sense to get the error every time, but it gets the error sometimes. Do you know the cause?

[2017/11/16 0:15] add sf_print_fds_stat() function. attach log file.FDS_GC_ERROR3_REPRODUCED.log

Best Regards, Haruki

[Petter Myhre]

If you are doing the same operations every time it is a bit strange that you are not getting no space every time. Maybe you are not clearing flash between every time you run the program? In SDK 14.1 a function for retrieving file system statistics was added, maybe you can use that to see what is going on?

[Haruki Kawakami]

Hi, What do you mean "Maybe you are not clearing flash between every time you run the program?"? Would you describe it in more detail? I think FDS in SDK14.1 doesn't have chunk. My program uses FDS chunk, so it is difficult to use SDK14.1 FDS. Am I true?

[Petter Myhre]

I just meant that the flash will not be cleared on reset, it will not be cleared unless you clear it through FDS or through the debugger. This might be obvious, but I have had customers forgetting this before. FDS14.1 doesn't have chunk, that is correct, then it might be difficult. Could you explain a bit more about what you are doing? Are you only updating the same record? And you are not using Peer Manager right?

[Haruki Kawakami]

You mean, erase flash using nrfjprog? If so, I erase all flash before write application.

If not, what API function do I have to call?

Yes, I'm only updating the same record and using Peer Manager.

The records to update are below.

1. (12 + 144) * 1

2. (12 + 691) * 2

3. (12 + 774) * 1

4. (12(header)+ 576) * 7

[Petter Myhre]

Yes, nrfjprog can clear the flash through the debugger. Or you can delete specific records with fds_record_delete(), or file with fds_file_delete().

So, when you say "It makes sense to get the error every time, but it gets the error sometimes." What do you mean by every time? Do you erase the complete flash between every time? Or is that just a reset? Or what?

Peer Manager also uses FDS to store data, so that may also be a reason for why it is full.