| 描述 | arm7™/arm9™ | cortex™-m |
|---|---|---|
| defined tasks | unlimited | unlimited |
| active tasks | 250 max | 250 max |
| mailboxes | unlimited | unlimited |
| semaphores | unlimited | unlimited |
| mutexes | unlimited | unlimited |
| signals / events | 16 per task | 16 per task |
| user timers | unlimited | unlimited |
| code space | <4.2 kbytes | <4.0 kbytes |
| ram space for kernel |
300 bytes 80 bytes user stack |
300 bytes 128 bytes main stack |
| ram space for a task | taskstacksize 52 bytes | taskstacksize 52 bytes |
| ram space for a mailbox | maxmessages * 4 16 bytes | maxmessages * 4 16 bytes |
| ram space for a semaphore | 8 bytes | 8 bytes |
| ram space for a mutex | 12 bytes | 12 bytes |
| ram space for a user timer | 8 bytes | 8 bytes |
| hardware requirements | one on-chip timer | systick timer |
| user task priorities | 1 - 254 | 1 - 254 |
| task switch time | <5.3 μsec @ 60 mhz | <2.6 μsec @ 72 mhz |
| interrupt lockout time | <2.7 μsec @ 60 mhz | not disabled by rtx |
注意
1.unlimited意味着rtx内核不施加任何数量限制。然而，可用的系统内存资源限制了创建的数量。
2.rtx内核的默认配置允许10个任务和10个用户定时器。默认情况下，也禁用堆栈检查。
3.rtx内核，event只不过是另一个信号名称。
4.ram的要求取决于并发运行任务的数量。
5.计算代码和ram大小为了在microlib中运行时库。
本文来自凯发app-凯发k8官网科技，原文地址：
http://www.myir-tech.com/resource/453.asp，转载请注明出处。
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