diff --git a/sys/dev/random/random_harvestq.h b/sys/dev/random/random_harvestq.h
--- a/sys/dev/random/random_harvestq.h
+++ b/sys/dev/random/random_harvestq.h
@@ -42,8 +42,6 @@
 	uint8_t		he_source;		/* origin of the entropy */
 };
 
-void read_rate_increment(u_int);
-
 #define	RANDOM_HARVEST_INIT_LOCK(x)	mtx_init(&harvest_context.hc_mtx, "entropy harvest mutex", NULL, MTX_SPIN)
 #define	RANDOM_HARVEST_LOCK(x)		mtx_lock_spin(&harvest_context.hc_mtx)
 #define	RANDOM_HARVEST_UNLOCK(x)	mtx_unlock_spin(&harvest_context.hc_mtx)
diff --git a/sys/dev/random/random_harvestq.c b/sys/dev/random/random_harvestq.c
--- a/sys/dev/random/random_harvestq.c
+++ b/sys/dev/random/random_harvestq.c
@@ -75,8 +75,6 @@
 static void random_kthread(void);
 static void random_sources_feed(void);
 
-static u_int read_rate;
-
 /*
  * Random must initialize much earlier than epoch, but we can initialize the
  * epoch code before SMP starts.  Prior to SMP, we can safely bypass
@@ -231,7 +229,7 @@
 	uint32_t entropy[HARVESTSIZE];
 	struct epoch_tracker et;
 	struct random_sources *rrs;
-	u_int i, n, local_read_rate;
+	u_int i, n;
 	bool rse_warm;
 
 	rse_warm = epoch_inited;
@@ -240,15 +238,10 @@
 	 * Step over all of live entropy sources, and feed their output
 	 * to the system-wide RNG.
 	 */
-	local_read_rate = atomic_readandclear_32(&read_rate);
-	/* Perform at least one read per round */
-	local_read_rate = MAX(local_read_rate, 1);
-	/* But not exceeding RANDOM_KEYSIZE_WORDS */
-	local_read_rate = MIN(local_read_rate, RANDOM_KEYSIZE_WORDS);
 	if (rse_warm)
 		epoch_enter_preempt(rs_epoch, &et);
 	CK_LIST_FOREACH(rrs, &source_list, rrs_entries) {
-		for (i = 0; i < p_random_alg_context->ra_poolcount*local_read_rate; i++) {
+		for (i = 0; i < p_random_alg_context->ra_poolcount; i++) {
 			n = rrs->rrs_source->rs_read(entropy, sizeof(entropy));
 			KASSERT((n <= sizeof(entropy)), ("%s: rs_read returned too much data (%u > %zu)", __func__, n, sizeof(entropy)));
 			/*
@@ -272,13 +265,6 @@
 	explicit_bzero(entropy, sizeof(entropy));
 }
 
-void
-read_rate_increment(u_int chunk)
-{
-
-	atomic_add_32(&read_rate, chunk);
-}
-
 /* ARGSUSED */
 static int
 random_check_uint_harvestmask(SYSCTL_HANDLER_ARGS)
diff --git a/sys/dev/random/randomdev.c b/sys/dev/random/randomdev.c
--- a/sys/dev/random/randomdev.c
+++ b/sys/dev/random/randomdev.c
@@ -187,7 +187,6 @@
 	if (error != 0)
 		return (error);
 
-	read_rate_increment(howmany(uio->uio_resid + 1, sizeof(uint32_t)));
 	total_read = 0;
 
 	/* Easy to deal with the trivial 0 byte case. */
@@ -286,7 +285,6 @@
 
 		(void)randomdev_wait_until_seeded(SEEDWAIT_UNINTERRUPTIBLE);
 	}
-	read_rate_increment(roundup2(len, sizeof(uint32_t)));
 	p_random_alg_context->ra_read(random_buf, len);
 }