1

According to the Raspberry Pi 4 Model B specs the SoC used is BCM2711. The BCM2711 uses an ARM Cortex-A72 core. Does this have simultaneous multi-threading (SMT), like Intel cores with hyperthreading? I have read somewhere that some newer ARM processors do.

Related: software threads vs hardware threads

2

I'm putting together a Raspberry Pi 4 cluster and had the same question (I need a particular minimum of hardware threads). Although there was no answer here, the question was answered in the comments, so for future visitors I'll summarize it:

The Raspberry Pi 4 does not have simultaneous multithreading ("SMT") hardware. Each of its four cores can only run one thread at a time. That said, each core will switch between (software) threads hundreds or thousands of times a second, so like any Intel- or AMD-based system it can still handle many threads "at once," from a human perspective.

| improve this answer | |
  • Right. The credits should go to @goldilocks cause he pointed at this topic during discussion. If goldilocks writes an answer I'd accept it. If not I'll accept this one that we can close this question. – thinwybk Oct 5 at 8:52
  • You should improve "...run one thread at a time..." probabably cause it could be misinterpreted as software thread. – thinwybk Oct 5 at 8:53
  • @thinwybk, I'll be happy to edit it, but I'm not sure what wording would improve it. Each core can run one thread at a time, regardless of what kind of thread it might be. – Head Geek Oct 6 at 1:59
  • Just have a look into the discussion hyperlinked in the comment section of the question. It's pretty obvious then. – thinwybk Oct 7 at 8:11

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.