RTOS comparison

[warm38 at juno.com]

Our company is looking into using an RTOS very soon.  The ones examined (by a company in India who does our protocol stacks) are:FreeRTOS,  Segger Emb-OS,  Micrium,  Threadx. Can anyone (Joel?) fill in the following for RTEMS so I can add in my 2 cents in for RTEMS? Kernel size (ROM)

Kernel RAM usage

Kernel Type

Scheduling

Scalability

Min. stack-size per task (RAM)

Max. no. of tasks

Max. no. of mailboxes

Max. no. of semaphores

Max. no. of software timers

Max. no. of priorities

Nested interrupts

Task switches from within ISR

Context switch time

Interrupt latency time

Atmel studio 7/ASF - Tool compatibility

Royalty Fee

License Cost

Networking POSIX compliant any tools to avoid priority inversion

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