High water marks

OO RTX

The OO RTX contains a number of buffers like event queue, which can be dimensioned via properties. Using the Debug buildset, you can inspect the variable Highwater in RiCHighwater.h with a debugger to see how much space within these buffers are actually used. In the Debug buildset, the compiler constant WST_HIGHWATERMARKS is defined via the property CPPCompileDebug. You can downsize the OO RTX dimensions after inspecting this constant.

There are some properties which define various sizes:

Property	Default value
WSTSmallBufferSize	16
WSTMediumBufferSize	32
WSTLargeBufferSize	96
WSTInitialSmallBuffers	12
WSTInitialMediumBuffers	6
WSTInitialLargeBuffers	1

The variable highwater is allocated in RiCHighwater.[ch] and is actually a structure with some members:

smallBuffersMax which is the maximum number of used elements in RiCSmallMemoryBlocks[]
mediumBuffersMax which is the maximum number of used elements in RiCMediumMemoryBlocks[]
largeBuffersMax which is the maximum number of used elements in RiCLargeMemoryBlocks[]
eventsMax which is the maximum number of events in the event queue RiCEvtQueue[] at one time.
You can set the constant RIC_MAX_EVENTS via the property WSTMaxEvents to tune the size of RiCEvtQueue[].
timeoutsMax which is the maximum number of timeout events in the timeout queue RiCTmManager_itsTimeout[] at one time.
You can set the constant RIC_MAX_TIMEOUTS via the property WSTMaxTimeouts to tune the size of RiCTmManager_itsTimeout[].

Please refer to the section Memory Management for more information on how to influence the resources used.