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RTX OS_STKSIZE changes static memory use

Antony Pace

LPC4078, uVision V4.74.0.22

I have 3 tasks in my system all of which I start with user defined stacks.
I start one with os_sys_init_user() and the other two with os_tsk_create_user().
I therefore didn't expect that changing OS_STKSIZE would have any effect on my static memory use but it does.

OS_STKSIZE defines the number of 32bit entries used for RTX task stacks. When I increase this value the static RAM allocated to rtx_config.o changes by that amount.

I also have OS_PRIVCNT set to 3. ie I have declared that all 3 tasks have user provided stacks.

What is this RAM used for?

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