Keil MDK-ARM RTX RTOS系统性能参数
文章来源:完美体育·(中国)手机网页版科技 发布日期:2013.4.11 浏览次数:12028 次 |
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。
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