米尔科技Keil MDK-ARM RTX RTOS系统性能参数简介

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。