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async I/O: WILLNEED readahead of the next expert block while computing the current one

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
JustVugg
2026-07-06 19:56:24 +02:00
parent 757b0a8369
commit 7a5ffd192d
1 changed files with 12 additions and 0 deletions
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c/glm.c
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@@ -814,6 +814,18 @@ static void moe(Model *m, Layer *l, int layer, float *x, int S, float *out){
#pragma omp parallel for schedule(dynamic,1)
for(int q=0;q<nmiss;q++) expert_load(m,layer,uniq[base+missk[q]],&m->ws[q]);
m->t_edisk += now_s()-t0; }
/* I/O ASINCRONO: readahead (WILLNEED) del blocco SUCCESSIVO mentre calcoliamo
* questo — il kernel legge in background, le pread dopo trovano cache calda */
if(base+64<nu){
int nb2 = nu-(base+64)<64 ? nu-(base+64) : 64;
for(int j=0;j<nb2;j++){ int eid=uniq[base+64+j]; int found=0;
ESlot *P=m->pin[layer];
for(int z=0;z<m->npin[layer] && !found;z++) if(P[z].eid==eid) found=1;
ESlot *Sl=m->ecache[layer];
for(int z=0;z<m->ecn[layer] && !found;z++) if(Sl[z].eid==eid) found=1;
if(!found) expert_prefetch(m,layer,eid);
}
}
for(int j=0;j<nb;j++){ int eid=uniq[base+j]; ESlot *e=use[j];
int nr=0; /* righe (posizioni) che usano questo expert */
for(int s=0;s<S;s++) for(int kk=0;kk<keff[s];kk++)