From 322a5afce3d6c5fbcf16ed9a8914805087b33a55 Mon Sep 17 00:00:00 2001
From: Takoroka <137927095+Takoroka@users.noreply.github.com>
Date: Thu, 29 Oct 2026 00:37:06 -0400
Subject: nx2: macro memo hashes its keys as they are, rewrites re-stored calls
 in place

The flat map re-hashed the already mixed u64 keys with MSVC's byte-wise
FNV-1a (~1.4% of the GPU thread), and calls stored again after a data
RAM guard failed appended new records, so the arena filled with stale
copies and was cleared every few seconds. EDEN_NX2_MME_MEMO_STATS logs
the counters: in title 1, 97.3% of calls replay, 2.1% fail a guard.
---
 src/video_core/macro.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/video_core/macro.cpp')

diff --git a/src/video_core/macro.cpp b/src/video_core/macro.cpp
index ee64ef5ab7..2864d1c5ad 100644
--- a/src/video_core/macro.cpp
+++ b/src/video_core/macro.cpp
@@ -1457,6 +1457,17 @@ void MacroEngine::Execute(Core::System& system, Engines::Maxwell3D& maxwell3d, u
             return value == nullptr || value[0] != '0';
         }();
         if (use_memo) {
+            // EDEN_NX2_MME_MEMO_STATS: log the memo's counters every 2^24 calls.
+            if (static const bool memo_stats = std::getenv("EDEN_NX2_MME_MEMO_STATS") != nullptr;
+                memo_stats && (++native_calls & 0xffffff) == 0) {
+                const auto& stats = native_memo.GetStatistics();
+                LOG_INFO(HW_GPU,
+                         "Macro memo: {} hits, {} misses, {} guard failures, {} stores ({} in "
+                         "place), {} clears; {} entries, {} KiB",
+                         stats.hits, stats.misses, stats.guard_failures, stats.stores,
+                         stats.overwrites, stats.clears, native_memo.Size(),
+                         native_memo.ArenaWords() * 4 / 1024);
+            }
             native_memo.Synchronize(native_code_generation);
             if (decltype(native_memo)::Effects effects;
                 native_memo.Find(method, parameters, *native_interpreter.active_dram, effects)) {
-- 
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