this post was submitted on 25 Jul 2024
1 points (100.0% liked)

Technology

59587 readers
2940 users here now

This is a most excellent place for technology news and articles.

Our Rules

  1. Follow the lemmy.world rules.
  2. Only tech related content.
  3. Be excellent to each another!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, to ask if your bot can be added please contact us.
  9. Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago
MODERATORS
L3s@lemmy.world
L4s@lemmy.world
L3s@fry.gs
L4s@fry.gs
enu@lemmy.world
1
Two Threads, One Core: How Simultaneous Multithreading Works Under the Hood (blog.codingconfessions.com)
submitted 4 months ago by abhi9u@lemmy.world to c/technology@lemmy.world
2 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] conciselyverbose@sh.itjust.works 0 points 4 months ago

The way shorter, simpler version is that there are a bunch of distinct parts of the CPU, and a single thread generally isn't structured in a way that can use all of those parts at once. By having two threads "at once", you can fill in the gaps where parts aren't used more efficiently.

This is also why the value of SMT varies based on workloads. Some code just isn't structured in a way that adding the extra thread helps.