Event Log Buffer Groups

Associated with each event log type is an event log buffer group that has a fixed set of characteristics. These characteristics include the buffer geometry and the completed buffer threshold. The geometry is defined as the maximum number of buffers and the number of pages per buffer. All buffers that a partition creates as part of the group are the same size (that is, the buffers are composed of the same number of pages). A maximum number of 512 buffers can be in the group at any one time. Depending upon the size of the buffers, the hypervisor implementation might not support the creation of the maximum number of buffers.

Prior to use, the partition must call the HvInitializeEventLogBufferGroup hypercall function to initialize the event log buffer group, at which time the partition establishes the group's characteristics. Initialization of the group might require memory to manage the necessary infrastructure to support the event log type. The hypervisor allocates this memory from the partition's pool. When the group is no longer needed, the partition calls the HvFinalizeEventLogBufferGroup hypercall function. The hypervisor then disables event logging, unmaps and deletes all buffers, and destroys the group.

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Build date: 11/16/2013