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1. Embed this notice
   Matthew Garrett (mjg59@nondeterministic.computer)'s status on Friday, 11-Aug-2023 00:47:50 JST Matthew Garrett

   STOP DOING SPECULATIVE EXECUTION

   INSTRUCTIONS WERE NOT MEANT TO HAVE REVERSIBLE SIDE EFFECTS

   • Doughnut Lollipop 【記録係】:blobfoxgooglymlem: and clacke like this.
   • Embed this notice
     Rich Felker (dalias@hachyderm.io)'s status on Sunday, 13-Aug-2023 18:47:12 JST Rich Felker

     in reply to

     • lj·rk

     @ljrk @mjg59 Sadly most of the teams doing performance oriented riscv designs are on the speculative bandwagon. 😫 🤦

     Haelwenn /элвэн/ :triskell: likes this.
   • Embed this notice
     lj·rk (ljrk@todon.eu)'s status on Sunday, 13-Aug-2023 18:47:14 JST lj·rk

     in reply to

     @mjg59 Maybe we should follow-through with a "fully" functional CPU without side-effects, by now the perf difference can't be that big, and we could theoretically always do speculation there, safely :-p

   • Embed this notice
     Mark Gardner (mjgardner@social.sdf.org)'s status on Sunday, 13-Aug-2023 19:12:13 JST Mark Gardner

     in reply to

     • abadidea

     @mjg59 @0xabad1dea THEY HAVE PLAYED US FOR ABSOLUTE FOOLS

     AND THEN REALIZED THEIR MISTAKE AND WE WERE NONE THE WISER

     clacke likes this.
   • Embed this notice
     clacke (clacke@libranet.de)'s status on Sunday, 13-Aug-2023 19:12:16 JST clacke

     in reply to

     • abadidea
     • Mark Gardner

     YOUR CACHE LINES ARE PRIMED BY EVENTS THAT NEVER HAPPENED

     FOR SECURITY BAIT AND SWITCH THE CPU INTO NOT MAKING A CALL WE CONTROL INSTEAD OF NOT MAKING A CALL AN ATTACKER WOULD CONTROL

     STATEMENTS DREAMED UP BY THE UTTERLY DERANGED

     @mjgardner @0xabad1dea @mjg59

   • Embed this notice
     Matt Campbell (matt@toot.cafe)'s status on Sunday, 13-Aug-2023 19:12:17 JST Matt Campbell

     in reply to

     @mjg59 All right, is there a way that we software developers can disable all speculative execution on our own machines so we can find out the new performance targets that we'll eventually have to meet?

     clacke likes this.