ftb: fix commit hit/miss perf counters

src/main/scala/xiangshan/frontend/FTB.scala

@@ -502,16 +502,16 @@ class FTB(implicit p: Parameters) extends BasePredictor with FTBParams with BPUU
   XSPerfAccumulate("ftb_read_hits", RegNext(io.s0_fire) && s1_hit)
   XSPerfAccumulate("ftb_read_misses", RegNext(io.s0_fire) && !s1_hit)
 
-  XSPerfAccumulate("ftb_commit_hits", u_valid && u_meta.hit)
-  XSPerfAccumulate("ftb_commit_misses", u_valid && !u_meta.hit)
+  XSPerfAccumulate("ftb_commit_hits", RegNext(io.update.valid) && u_meta.hit)
+  XSPerfAccumulate("ftb_commit_misses", RegNext(io.update.valid) && !u_meta.hit)
 
   XSPerfAccumulate("ftb_update_req", io.update.valid)
   XSPerfAccumulate("ftb_update_ignored", io.update.valid && io.update.bits.old_entry)
   XSPerfAccumulate("ftb_updated", u_valid)
 
   val perfEvents = Seq(
-    ("ftb_commit_hits            ", u_valid  &&  u_meta.hit),
-    ("ftb_commit_misses          ", u_valid  && !u_meta.hit),
+    ("ftb_commit_hits            ", RegNext(io.update.valid)  &&  u_meta.hit),
+    ("ftb_commit_misses          ", RegNext(io.update.valid)  && !u_meta.hit),
   )
   generatePerfEvent()
 }