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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Adrián Arroyo Calle‏ @aarroyoca 7 Jan 2020

      With this fight over spinlocks in Linux almost clear, now I want to know if @Jonathan_Blow used them in their games and if he knew about the performance hit

      0 replies 0 retweets 0 likes
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    3. Adrián Arroyo Calle‏ @aarroyoca 7 Jan 2020
      Replying to @Jonathan_Blow

      Thanks! Some context here. It started here: https://probablydance.com/2019/12/30/measuring-mutexes-spinlocks-and-how-bad-the-linux-scheduler-really-is/ … and there was a Linus response here: https://www.realworldtech.com/forum/?threadid=189711&curpostid=189723 …

      0 replies 0 retweets 8 likes
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      Casey Muratori‏ @cmuratori 7 Jan 2020
      Replying to @Jonathan_Blow @aarroyoca

      Everything Linus said was exactly what I thought when I read the blog post. But maybe we are both wrong. I could try to elaborate but probably not on Twitter? Either way, anyone who claims to be timing a kernel scheduler using C++ without ever showing the ASM is a bit suspect.

      7:45 PM - 7 Jan 2020
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      • renehsz Trevor Hayes bc1n0 Adrian Negreanu
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        2. Casey Muratori‏ @cmuratori 7 Jan 2020
          Replying to @Jonathan_Blow @aarroyoca

          Because if you go back and read the blog post in detail (which is kind of a waste of time, but if you are bored), the guy wrote literally a loop that does nothing but take clock samples and locks. In that scenario, it is _very likely_ the OS will swap you out in between!

          1 reply 0 retweets 2 likes
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