Since you can’t control latency of individual packets let alone that the hardware timing is identical this isn’t practical as a requirement.
Deterministic gameplay means after the same x frames with the same external inputs you will end up with the same state y on different hardware. Therefore we only need to make sure the clients stay within a reasonable margin. We can do this by waiting for all players inputs so moving at the slowest speed possible which is the lock-step method. Or we can change our measured frame time so each tick (which still ticks the same amount of sim time) is seen as faster or slower. That way we can track the other frames that other clients have completed from the input they send and slow or speed ourselves up to maintain a decent margin. This is the scheme used in rollback networking as the naïve implementation where this isn’t the case forces all rollbacks onto the faster machine.
Deterministic gameplay means after the same x frames with the same external inputs you will end up with the same state y on different hardware. Therefore we only need to make sure the clients stay within a reasonable margin. We can do this by waiting for all players inputs so moving at the slowest speed possible which is the lock-step method. Or we can change our measured frame time so each tick (which still ticks the same amount of sim time) is seen as faster or slower. That way we can track the other frames that other clients have completed from the input they send and slow or speed ourselves up to maintain a decent margin. This is the scheme used in rollback networking as the naïve implementation where this isn’t the case forces all rollbacks onto the faster machine.