https://matthewpenney.net/tags/cyclops/Recent content in Cyclops on Matthew PenneyHugoen-gbSat, 09 May 2026 17:50:18 +0100https://matthewpenney.net/posts/cache_size/Sat, 09 May 2026 17:50:18 +0100https://matthewpenney.net/posts/cache_size/<p>In this investigation, I aim to estimate the sizes of my CPU&rsquo;s L1D and LLC caches.</p> <h2 id="general-approach-and-hypothesis">General Approach and Hypothesis</h2> <p>The approach I took was to process arrays of varying length and measure median cache miss rates for each array size.</p> <p>Once the array exceeds the capacity of the CPU&rsquo;s cache, I expect the cache misses to sharply increase since the array no longer fits entirely in the cache, and some reads will need to go to RAM or the next-level cache.</p>