undefined | Better HN

0 pointsradicality1y ago0 comments

The term PROCHOT just brought me back to vivid memories of debugging exactly that at Facebook a while ago.

It was very non-obvious to debug since pretty much most emitted metrics, apart from mysterious errors/timeouts to our service, looked reasonable. Even the cpu usage and cpu temperature graphs looked normal since it was a bogus prochot and not actually a real thermal throttling

0 comments

porridgeraisin1y ago

And it brought me back to memories of debugging that on my friends laptop.

It kept going to 400mhz.. i suspected throttling and we got it cleaned thermal paste replaced and all that.

Still throttled. We replaced the windows with linux since it was atleast a bit more usable

At the time I didn't know about PROCHOT. And my googling skills clearly weren't sufficient.

One fine day during lunch at a place on campus, Id read about BD_PROCHOT recently. So i wrote a script to msrprobe or whatever it was and disabled it. "Extended" the lifespan of the thing.

iforgotpassword1y ago

I once had a dell laptop that after about three years started complaining on power up that I wouldn't be using a genuine dell PSU and should switch to one. I ignored it at first because you could just hit enter and carry on, but after a while I noticed that every time this happened, the cpu would clock at a fixed 800mhz. I ordered a new power brick but the message didn't go away, so I returned the brick and decided to never buy dell again.

j / k navigate · click thread line to collapse