Report timing info for stakes cache updates from txs (backport solana-labs#20856) (solana-labs#20883)

* Report timing info for stakes cache updates from txs (solana-labs#20856)

(cherry picked from commit 7350166)

# Conflicts:
#	runtime/src/bank.rs

* resolve conflicts

Co-authored-by: Justin Starry <justin@solana.com>

Author: mergify[bot]

core/src/progress_map.rs

@@ -63,6 +63,11 @@ impl ReplaySlotStats {
             ("load_us", self.execute_timings.load_us, i64),
             ("execute_us", self.execute_timings.execute_us, i64),
             ("store_us", self.execute_timings.store_us, i64),
+            (
+                "update_stakes_cache_us",
+                self.execute_timings.update_stakes_cache_us,
+                i64
+            ),
             (
                 "total_batches_len",
                 self.execute_timings.total_batches_len,

runtime/src/bank.rs

@@ -167,6 +167,7 @@ pub struct ExecuteTimings {
     pub load_us: u64,
     pub execute_us: u64,
     pub store_us: u64,
+    pub update_stakes_cache_us: u64,
     pub total_batches_len: usize,
     pub num_execute_batches: u64,
     pub details: ExecuteDetailsTimings,
@@ -178,6 +179,7 @@ impl ExecuteTimings {
         self.load_us += other.load_us;
         self.execute_us += other.execute_us;
         self.store_us += other.store_us;
+        self.update_stakes_cache_us += other.update_stakes_cache_us;
         self.total_batches_len += other.total_batches_len;
         self.num_execute_batches += other.num_execute_batches;
         self.details.accumulate(&other.details);
@@ -3917,8 +3919,10 @@ impl Bank {
         );
         let rent_debits = self.collect_rent(executed, loaded_txs);
 
+        let mut update_stakes_cache_time = Measure::start("update_stakes_cache_time");
         let overwritten_vote_accounts =
-            self.update_cached_accounts(hashed_txs.as_transactions_iter(), executed, loaded_txs);
+            self.update_stakes_cache(hashed_txs.as_transactions_iter(), executed, loaded_txs);
+        update_stakes_cache_time.stop();
 
         // once committed there is no way to unroll
         write_time.stop();
@@ -3928,6 +3932,7 @@ impl Bank {
             hashed_txs.len()
         );
         timings.store_us += write_time.as_us();
+        timings.update_stakes_cache_us += update_stakes_cache_time.as_us();
         self.update_transaction_statuses(hashed_txs, executed);
         let fee_collection_results =
             self.filter_program_errors_and_collect_fee(hashed_txs.as_transactions_iter(), executed);
@@ -5301,8 +5306,8 @@ impl Bank {
         self.epoch_schedule.get_leader_schedule_epoch(slot)
     }
 
-    /// a bank-level cache of vote accounts
-    fn update_cached_accounts<'a>(
+    /// a bank-level cache of vote accounts and stake delegation info
+    fn update_stakes_cache<'a>(
         &self,
         txs: impl Iterator<Item = &'a Transaction>,
         res: &[TransactionExecutionResult],