[HN Gopher] Illuminating the processor core with LLVM-mca
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       Illuminating the processor core with LLVM-mca
        
       Author : ckennelly
       Score  : 40 points
       Date   : 2025-12-14 15:05 UTC (4 hours ago)
        
 (HTM) web link (abseil.io)
 (TXT) w3m dump (abseil.io)
        
       | KeplerBoy wrote:
       | Also nicely demonstrated in godbolt's currently ongoing Advent of
       | compiler optimizations series.
        
       | alain94040 wrote:
       | This is interesting if quite incomplete (as noted in the end
       | conclusion). CPU re-order buffers turn what you think as mostly
       | sequential execution into a massively parallel engine. Data
       | memory access, perfecting, speculative execution, etc. But if you
       | are running a micro-bencmark with a tight loop of millions of
       | iterations, then understanding the pipeline dependencies and
       | dispatching can provide good insights.
        
       | esbranson wrote:
       | Too bad they don't support LC-3 or DLX. More my level lol. So
       | begins another deep dive side quest with the chatbot into a tool
       | I didn't even know existed.
        
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       (page generated 2025-12-14 20:00 UTC)