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Detect Total Ram in System from Code

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Applicable Environment

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Topic: Detect Total Ram in System from Code
SDP: 6.5.0
Target: Any supported target

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Recommendation

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To obtain the total system memory from code you will need to query the the system page. Here is a simple example on how this can be done.

static uint64_t get_total_mem(void)
{
char *str = SYSPAGE_ENTRY(strings)->data;
struct asinfo_entry *as = SYSPAGE_ENTRY(asinfo);
uint64_t total = 0;
unsigned num;

for(num = _syspage_ptr->asinfo.entry_size / sizeof(*as); num > 0; --num) {
    if(strcmp(&str[as->name], "ram") == 0)
    {
      total += as->end - as->start + 1;
    }
    ++as;
}
return total;
}

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NOTE: This entry has been validated against the SDP version listed above. Use caution when considering this advice for any other SDP version. For supported releases, please reach out to QNX Technical Support if you have any questions/concerns.

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