Everyone knows what B.J. Goodson is doing as he throws his body around, hits teammates hard enough to irritate them and operates at a speed and ferocity slightly ramped up from those around him.

Goodson has been installed as the starting middle linebacker, a coveted role he is intent on keeping as he heads into his second NFL season and first as a factor within the Giants’ defense.

“He’s been hungry for a while and he’s coming in and trying to take that role,’’ defensive end Olivier Vernon said. “He’s going to be physical. That’s what we like.’’

Physical is fine, as long as Goodson does not go over the line. It is a tightrope some of the Giants who make a living on offense believe Goodson already has crossed.

“This is his first year as a starter and you can say he’s amped up to make a point,’’ running back Orleans Darkwa told The Post. “He’s the leader of the defense. He’s gonna try to go out there and make plays. I think you just got to be a little bit smarter. He’s gonna do his job and you got to prepare yourself for it on the other end.’’

Darkwa was not fully prepared Wednesday, when a heavy hit by Goodson in the hole prompted Darkwa to show his disgust to spark the first of three altercations. On the very first play of a 7-on-7 drill Tuesday, Goodson cracked receiver Sterling Shepard after a short completion and Shepard went at his 2016 NFL draft classmate.

The Giants have noticed Goodson’s ferocity, and some of them wonder if he realizes what practice is all about.

“That thin line, you just got to be smart,’’ Darkwa said. “Especially for me, not being here at the end of the year, having an injury, I don’t want to miss anything, so I don’t like that.

“I told him before, ‘You got to be smart. We’re a team. You don’t want to hurt anybody,’ but at the same time he’s trying to be physical. That’s his style. We just got to be prepared for it. He’s not gonna change the way he plays on the field. You live and you learn. If he’s gonna play that way, we got to play a certain way as backs.’’

This is what the Giants want to see from Goodson, within reason. He was a core special teams player as a rookie, getting on the field for only 14 snaps on defense. The plan for the fourth-round draft pick was to give him a year to acclimate then turn him loose as the man in the middle of a stacked defense, tasked with making the calls and getting his teammates lined up. At Clemson, Goodson was known as a brutally effective run-stopper, and the Giants want some of that nastiness added to their already-formidable group.

“B.J. Goodson I think has been the most impressive guy in practices because he’s been the most physical, and I just love that,’’ said cornerback Eli Apple, another member of the 2016 draft class. “It’s really been setting the tempo for our defense. Sometimes the offense can get a little mad about, sometimes with the hits and stuff, but it’s a brotherhood. It makes us better.’’

The key, of course, is how the man in charge views Goodson’s aggressive ways and disregard for some of the protocols of the practice tempo.

“It’s a thud tempo and B.J. is good at thudding,’’ Ben McAdoo said. “The backs need to feel it. The linebackers need to feel it. There needs to be contact there.”

Oh, there’s contact there. It is the mental part of the game where Goodson needs to prove his readiness, as the “thudding’’ aspect already is developed.

“From Day 1, B.J., to me, is a kid who knows how to find the football, which is key for a middle linebacker,’’ Carl Banks, former Giants linebacker, told The Post. “But he knows what to do when he gets to the football. The biggest challenge for him will be to do it faster, at NFL speed, and the bigger challenge is, because he’s a middle linebacker and his defense is complex, he’s gotta play quarterback, too. Hopefully they simplify it and put some of the burden on Landon Collins to help get the defense lined up. That’ll allow [Goodson] to play at an NFL speed. He can find the ball — he just has to get there faster.”

And in the view of some of his teammates, he needs to get there a bit less violently.