Add new MEMORY_TYPE_* flags for RAM class sub-types #7936
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Repurpose the unused MEMORY_TYPE_IGC_SCAN_QUEUE flag as MEMORY_TYPE_RAM_CLASS_ABOVE4G_FREQUENTLY_ACCESSED. Introduce MEMORY_TYPE_RAM_CLASS_ABOVE4G_INFREQUENTLY_ACCESSED as a new flag. These flags will be used to distinguish segments between frequently and infrequently accessed RAM class sub-types. Related: eclipse-openj9/openj9#20644 Signed-off-by: Babneet Singh <[email protected]>
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Add support to identify RAM class memory segments in javacores using the following sub-types: - MEMORY_TYPE_RAM_CLASS_SUB4G - MEMORY_TYPE_RAM_CLASS_ABOVE4G_FREQUENTLY_ACCESSED - MEMORY_TYPE_RAM_CLASS_ABOVE4G_INFREQUENTLY_ACCESSED This enables finer classification of RAM class segments in javacores and allows tracking of usage by sub-type. Related: eclipse-openj9#20644 Depends on eclipse-omr/omr#7936 Signed-off-by: Babneet Singh <[email protected]>
This was referenced Sep 17, 2025
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Repurpose the unused
MEMORY_TYPE_IGC_SCAN_QUEUEflag asMEMORY_TYPE_RAM_CLASS_ABOVE4G_FREQUENTLY_ACCESSED.Introduce
MEMORY_TYPE_RAM_CLASS_ABOVE4G_INFREQUENTLY_ACCESSEDas a new flag.
These flags will be used to distinguish segments between
frequently and infrequently accessed RAM class sub-types.
Related: eclipse-openj9/openj9#20644