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diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -1644,14 +1644,16 @@
struct tx_ring *txr, struct rx_ring *rxr)
{
struct e1000_hw *hw = &sc->hw;
+ unsigned long bytes, bytes_per_packet, packets;
+ unsigned long rxbytes, rxpackets, txbytes, txpackets;
u32 newitr;
- u32 bytes;
- u32 bytes_packets;
- u32 packets;
u8 nextlatency;
+ rxbytes = atomic_load_long(&rxr->rx_bytes);
+ txbytes = atomic_load_long(&txr->tx_bytes);
+
/* Idle, do nothing */
- if ((txr->tx_bytes == 0) && (rxr->rx_bytes == 0))
+ if (txbytes == 0 && rxbytes == 0)
return;
newitr = 0;
@@ -1671,17 +1673,20 @@
goto em_set_next_itr;
}
+ bytes = bytes_per_packet = 0;
/* Get largest values from the associated tx and rx ring */
- if (txr->tx_bytes && txr->tx_packets) {
- bytes = txr->tx_bytes;
- bytes_packets = txr->tx_bytes/txr->tx_packets;
- packets = txr->tx_packets;
+ txpackets = atomic_load_long(&txr->tx_packets);
+ if (txpackets != 0) {
+ bytes = txbytes;
+ bytes_per_packet = txbytes / txpackets;
+ packets = txpackets;
}
- if (rxr->rx_bytes && rxr->rx_packets) {
- bytes = max(bytes, rxr->rx_bytes);
- bytes_packets =
- max(bytes_packets, rxr->rx_bytes/rxr->rx_packets);
- packets = max(packets, rxr->rx_packets);
+ rxpackets = atomic_load_long(&rxr->rx_packets);
+ if (rxpackets != 0) {
+ bytes = lmax(bytes, rxbytes);
+ bytes_per_packet =
+ lmax(bytes_per_packet, rxbytes / rxpackets);
+ packets = lmax(packets, rxpackets);
}
/* Latency state machine */
@@ -1691,7 +1696,7 @@
break;
case itr_latency_lowest: /* 70k ints/s */
/* TSO and jumbo frames */
- if (bytes_packets > 8000)
+ if (bytes_per_packet > 8000)
nextlatency = itr_latency_bulk;
else if ((packets < 5) && (bytes > 512))
nextlatency = itr_latency_low;
@@ -1699,14 +1704,14 @@
case itr_latency_low: /* 20k ints/s */
if (bytes > 10000) {
/* Handle TSO */
- if (bytes_packets > 8000)
+ if (bytes_per_packet > 8000)
nextlatency = itr_latency_bulk;
else if ((packets < 10) ||
- (bytes_packets > 1200))
+ (bytes_per_packet > 1200))
nextlatency = itr_latency_bulk;
else if (packets > 35)
nextlatency = itr_latency_lowest;
- } else if (bytes_packets > 2000) {
+ } else if (bytes_per_packet > 2000) {
nextlatency = itr_latency_bulk;
} else if (packets < 3 && bytes < 512) {
nextlatency = itr_latency_lowest;

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