This read-only TimeIntervalSec object contains the total round trip time for all SMB connections since the SMB AO was started, with discontinuities possible at re-initialization, indicated by cwoAoStatsLastResetTime. An admin uses this as an aggregate latency measure across all SMB traffic passing through the optimizer, useful for spotting broad WAN latency trends affecting file access. A rising cumulative RTT trend beyond what connection volume alone would explain would point an admin toward a degrading WAN path rather than the SMB AO itself.