Resource usage
High performance combined with low resource usage has always been a major design consideration.
Resource usage of different operating systems
The actual resource usage depends on many factors (CPU, compiler, memory model, optimization, configuration, etc.). Therefore, these values are neither precise, nor guaranteed – but they give you a good idea of the memory requirements. In the table below, which is for a 32 bit target and XRelease build, you will find minimum ROM and RAM size requirements.
| Module | Memory type | Memory requirements |
|---|---|---|
| embOS kernel | ROM | ~ 1700 bytes |
| embOS kernel | RAM | ~ 110 bytes |
| Task control block | RAM | 36 bytes |
| Software timer | RAM | 20 bytes |
| Task event | RAM | 0 bytes |
| Event object | RAM | 12 bytes |
| Mutex | RAM | 16 bytes |
| Semaphore | RAM | 8 bytes |
| RWLocks | RAM | 28 bytes |
| Mailbox | RAM | 24 bytes |
| Queue | RAM | 32 bytes |
| Watchdog | RAM | 12 bytes |
| Fixed Block Size Memory Pool | RAM | 32 bytes |