REPIN follows live session heat (decaying heat map; .coli_usage stays the persistent signal) + disk→RAM→VRAM promotion (#26)

2026-07-10 18:48:53 +08:00
parent 3e4d08b6bf
commit 1453dab7ae
6 changed files with 115 additions and 26 deletions
@@ -0,0 +1,31 @@
+#ifndef COLIBRI_TIER_H
+#define COLIBRI_TIER_H
+
+#include <stdint.h>
+
+/* Pick one RAM/VRAM hot-store slot to replace from recent routing heat.
+ * The fixed margin handles tiny samples; the 25% margin prevents ping-pong. */
+static int tier_pick_swap(const uint32_t *heat, int nexpert,
+                          const int *pinned, int npin,
+                          int *slot, int *eid, long *gain){
+    if(!heat || !pinned || npin<1 || nexpert<1) return 0;
+    int cold=0;
+    for(int z=1;z<npin;z++) if(heat[pinned[z]]<heat[pinned[cold]]) cold=z;
+    int hot=-1; uint32_t fh=0;
+    for(int e=0;e<nexpert;e++){
+        int resident=0;
+        for(int z=0;z<npin;z++) if(pinned[z]==e){ resident=1; break; }
+        if(!resident && heat[e]>fh){ fh=heat[e]; hot=e; }
+    }
+    if(hot<0) return 0;
+    uint32_t fc=heat[pinned[cold]];
+    if(fh<=fc+(fc>>2)+4) return 0;
+    *slot=cold; *eid=hot; *gain=(long)fh-(long)fc;
+    return 1;
+}
+
+static void tier_decay(uint32_t *heat, int nexpert){
+    for(int e=0;e<nexpert;e++) heat[e]>>=1;
+}
+
+#endif