Per-session accounting is an NP7 hardware logging feature that allows the FortiGate to report the correct bytes/pkt numbers per session for sessions offloaded to an NP7 processor. This information appears in traffic log messages as well as in FortiView. The following example shows the Sessions dashboard widget tracking SPU and nTurbo sessions. Current sessions shows the total number of sessions, Software shows the percent of sessions handled by the CPU, SPU shows the percentage of these sessions that are SPU sessions, and Nturbo shows the percentage that are nTurbo sessions.
You can also enable per-session accounting separately for TCP multicast sessions.