6 ms·

Bisected: The Unfortunate Reason Linux 4.20 Is Running Slower

• craftyguy 8y ago
  Dupe: https://news.ycombinator.com/item?id=18471448 https://news.ycombinator.com/item?id=18471448
  • deleted 8y ago
    [deleted]
  • jey 8y ago
    also https://news.ycombinator.com/item?id=18476562 https://news.ycombinator.com/item?id=18476562
    • sctb 8y ago
      Since that one's the active discussion, we've moved the comments there.
      • craftyguy 8y ago
        Your dupe detector is broken. The URLs are the same, how did it not trigger?
        • detaro 8y ago
          The second has a different URL, the first probably didn't have enough upvotes to "arm" the dupe detector?
• deleted 8y ago
  [deleted]
• gcb0 8y ago
  to save everyone the click on the dupes: craftyguy 1 day ago | unvote [-] tl;dr: The cause is the Single Thread Indirect Branch Predictors (STIBP) for cross-hyperthread Spectre mitigation on Intel processors.