| Event type | Event subtype | Event detail |
| System call entry | N/A | System call ID; Instruction counter |
| System call exit | N/A | None |
| Trap entry | N/A | Trap ID; Instruction counter |
| Trap exit | N/A | None |
| Interrupt entry | N/A | Interrupt ID; Kernel-space occurrence |
| Interrupt exit | N/A | None |
| Scheduling change | N/A | Incoming process ID; Outoing process ID; Outgoing process state |
| Kernel timer | N/A | None |
| Soft IRQ | Bottom half | Bottom half ID |
| Soft IRQ | Bottom half ID | |
| Tasklet action | Address of function | |
| Tasklet hi-action | Address of function | |
| Process | Creation of kernel thread | Thread start address; PID |
| Fork | PID of created process | |
| Exit | None | |
| Wait | PID waited on | |
| Signal | Signal ID; Destination PID | |
| Wakeup | Process PID; State prior to wakeup | |
| Filesystem | Buffer wait start | None |
| Buffer wait end | None | |
| Exec | Filename | |
| Open | Filename; File descriptor | |
| Close | File descriptor | |
| Read | File descriptor; Quantity read | |
| Write | File descriptor; Quantity written | |
| Seek | File descriptor; Offset | |
| Ioctl | File descriptor; Command | |
| Select | File descriptor; Timeout | |
| Poll | File descriptor; Timeout | |
| Timer | Expired | None |
| Setitimer | Type; Time | |
| Setitimeout | Time | |
| Memory | Page alloc | Size order |
| Page free | Size order | |
| Swap in | Page address | |
| Swap out | Page address | |
| Page wait start | None | |
| Page wait end | None | |
| Socket communication | Socket call | Call ID; Socket ID |
| Socket create | Socket type; ID of create socket | |
| Socket send | Socket type; Quantity sent | |
| Socket receive | Socket type; Qunatity received | |
| Inter-Proces communication | System V IPC call | Call ID; Object ID |
| Message queue create | Message queue ID; Creation flags | |
| Semaphore create | Semaphore ID; Creation flags | |
| Shared memory create | Shared memory ID; Creation flags | |
| Network | Incoming packet | Protocol type |
| Outgoing packet | Protocol type |