I remember reading a article here on hn about inverse hyper threading (I don't remember the correct term) where multiple cores would work together to increase s

I remember reading a article here on hn about inverse hyper threading (I don't remember the correct term) where multiple cores would work together to increase single threaded performance (if some cores are idle). I believe some company (not a major player like AMD, Intel or Samsung etc.) claimed they would have solved major problems with previous implementations of this idea or something along those lines. Sounds interesting but is that even possible? Seems like it would have been the perfect fit for AMDs Bulldozer back then due to the chips worse single threaded performance and it's unused multi threaded performance in mainstream software.