diff --git a/sys/dev/cxgbe/adapter.h b/sys/dev/cxgbe/adapter.h
--- a/sys/dev/cxgbe/adapter.h
+++ b/sys/dev/cxgbe/adapter.h
@@ -686,6 +686,8 @@
 	uint64_t rx_iscsi_padding_errors;
 	uint64_t rx_iscsi_header_digest_errors;
 	uint64_t rx_iscsi_data_digest_errors;
+	uint64_t rx_aio_ddp_jobs;
+	uint64_t rx_aio_ddp_octets;
 	u_long	rx_toe_tls_records;
 	u_long	rx_toe_tls_octets;
 } __aligned(CACHE_LINE_SIZE);
@@ -752,6 +754,8 @@
 	counter_u64_t tx_iscsi_pdus;
 	counter_u64_t tx_iscsi_octets;
 	counter_u64_t tx_iscsi_iso_wrs;
+	counter_u64_t tx_aio_jobs;
+	counter_u64_t tx_aio_octets;
 	counter_u64_t tx_toe_tls_records;
 	counter_u64_t tx_toe_tls_octets;
 } __aligned(CACHE_LINE_SIZE);
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -12026,6 +12026,8 @@
 				counter_u64_zero(ofld_txq->tx_iscsi_pdus);
 				counter_u64_zero(ofld_txq->tx_iscsi_octets);
 				counter_u64_zero(ofld_txq->tx_iscsi_iso_wrs);
+				counter_u64_zero(ofld_txq->tx_aio_jobs);
+				counter_u64_zero(ofld_txq->tx_aio_octets);
 				counter_u64_zero(ofld_txq->tx_toe_tls_records);
 				counter_u64_zero(ofld_txq->tx_toe_tls_octets);
 			}
@@ -12043,6 +12045,8 @@
 				ofld_rxq->rx_iscsi_ddp_octets = 0;
 				ofld_rxq->rx_iscsi_fl_pdus = 0;
 				ofld_rxq->rx_iscsi_fl_octets = 0;
+				ofld_rxq->rx_aio_ddp_jobs = 0;
+				ofld_rxq->rx_aio_ddp_octets = 0;
 				ofld_rxq->rx_toe_tls_records = 0;
 				ofld_rxq->rx_toe_tls_octets = 0;
 			}
diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -4146,6 +4146,12 @@
 		return;
 
 	children = SYSCTL_CHILDREN(oid);
+	SYSCTL_ADD_U64(ctx, children, OID_AUTO, "rx_aio_ddp_jobs",
+	    CTLFLAG_RD, &ofld_rxq->rx_aio_ddp_jobs, 0,
+	    "# of aio_read(2) jobs completed via DDP");
+	SYSCTL_ADD_U64(ctx, children, OID_AUTO, "rx_aio_ddp_octets",
+	    CTLFLAG_RD, &ofld_rxq->rx_aio_ddp_octets, 0,
+	    "# of octets placed directly for aio_read(2) jobs");
 	SYSCTL_ADD_ULONG(ctx, children, OID_AUTO,
 	    "rx_toe_tls_records", CTLFLAG_RD, &ofld_rxq->rx_toe_tls_records,
 	    "# of TOE TLS records received");
@@ -4809,6 +4815,8 @@
 		ofld_txq->tx_iscsi_pdus = counter_u64_alloc(M_WAITOK);
 		ofld_txq->tx_iscsi_octets = counter_u64_alloc(M_WAITOK);
 		ofld_txq->tx_iscsi_iso_wrs = counter_u64_alloc(M_WAITOK);
+		ofld_txq->tx_aio_jobs = counter_u64_alloc(M_WAITOK);
+		ofld_txq->tx_aio_octets = counter_u64_alloc(M_WAITOK);
 		ofld_txq->tx_toe_tls_records = counter_u64_alloc(M_WAITOK);
 		ofld_txq->tx_toe_tls_octets = counter_u64_alloc(M_WAITOK);
 		add_ofld_txq_sysctls(&vi->ctx, oid, ofld_txq);
@@ -4847,6 +4855,8 @@
 		counter_u64_free(ofld_txq->tx_iscsi_pdus);
 		counter_u64_free(ofld_txq->tx_iscsi_octets);
 		counter_u64_free(ofld_txq->tx_iscsi_iso_wrs);
+		counter_u64_free(ofld_txq->tx_aio_jobs);
+		counter_u64_free(ofld_txq->tx_aio_octets);
 		counter_u64_free(ofld_txq->tx_toe_tls_records);
 		counter_u64_free(ofld_txq->tx_toe_tls_octets);
 		free_wrq(sc, &ofld_txq->wrq);
@@ -4874,6 +4884,12 @@
 	SYSCTL_ADD_COUNTER_U64(ctx, children, OID_AUTO, "tx_iscsi_iso_wrs",
 	    CTLFLAG_RD, &ofld_txq->tx_iscsi_iso_wrs,
 	    "# of iSCSI segmentation offload work requests");
+	SYSCTL_ADD_COUNTER_U64(ctx, children, OID_AUTO, "tx_aio_jobs",
+	    CTLFLAG_RD, &ofld_txq->tx_aio_jobs,
+	    "# of zero-copy aio_write(2) jobs transmitted");
+	SYSCTL_ADD_COUNTER_U64(ctx, children, OID_AUTO, "tx_aio_octets",
+	    CTLFLAG_RD, &ofld_txq->tx_aio_octets,
+	    "# of payload octets in transmitted zero-copy aio_write(2) jobs");
 	SYSCTL_ADD_COUNTER_U64(ctx, children, OID_AUTO, "tx_toe_tls_records",
 	    CTLFLAG_RD, &ofld_txq->tx_toe_tls_records,
 	    "# of TOE TLS records transmitted");
diff --git a/sys/dev/cxgbe/tom/t4_cpl_io.c b/sys/dev/cxgbe/tom/t4_cpl_io.c
--- a/sys/dev/cxgbe/tom/t4_cpl_io.c
+++ b/sys/dev/cxgbe/tom/t4_cpl_io.c
@@ -2173,6 +2173,7 @@
 	struct inpcb *inp;
 	struct tcpcb *tp;
 	struct mbuf *m;
+	u_int sent;
 	int error, len;
 	bool moretocome, sendmore;
 
@@ -2275,7 +2276,9 @@
 		goto out;
 	}
 
-	job->aio_sent += m_length(m, NULL);
+	sent = m_length(m, NULL);
+	job->aio_sent += sent;
+	counter_u64_add(toep->ofld_txq->tx_aio_octets, sent);
 
 	sbappendstream(sb, m, 0);
 	m = NULL;
@@ -2328,6 +2331,7 @@
 	 * socket.
 	 */
 	aiotx_free_job(job);
+	counter_u64_add(toep->ofld_txq->tx_aio_jobs, 1);
 
 out:
 	if (error) {
diff --git a/sys/dev/cxgbe/tom/t4_ddp.c b/sys/dev/cxgbe/tom/t4_ddp.c
--- a/sys/dev/cxgbe/tom/t4_ddp.c
+++ b/sys/dev/cxgbe/tom/t4_ddp.c
@@ -319,8 +319,11 @@
 		placed = n;
 		if (placed > job->uaiocb.aio_nbytes - copied)
 			placed = job->uaiocb.aio_nbytes - copied;
-		if (placed > 0)
+		if (placed > 0) {
 			job->msgrcv = 1;
+			toep->ofld_rxq->rx_aio_ddp_jobs++;
+		}
+		toep->ofld_rxq->rx_aio_ddp_octets += placed;
 		if (!aio_clear_cancel_function(job)) {
 			/*
 			 * Update the copied length for when
@@ -560,6 +563,8 @@
 	CURVNET_RESTORE();
 
 	job->msgrcv = 1;
+	toep->ofld_rxq->rx_aio_ddp_jobs++;
+	toep->ofld_rxq->rx_aio_ddp_octets += len;
 	if (db->cancel_pending) {
 		/*
 		 * Update the job's length but defer completion to the
@@ -724,8 +729,11 @@
 		placed = len;
 		if (placed > job->uaiocb.aio_nbytes - copied)
 			placed = job->uaiocb.aio_nbytes - copied;
-		if (placed > 0)
+		if (placed > 0) {
 			job->msgrcv = 1;
+			toep->ofld_rxq->rx_aio_ddp_jobs++;
+		}
+		toep->ofld_rxq->rx_aio_ddp_octets += placed;
 		if (!aio_clear_cancel_function(job)) {
 			/*
 			 * Update the copied length for when