root@am335x-evm:~# uname -a Linux am335x-evm 4.4.32-gadde2ca9f8 #1 PREEMPT Wed Dec 14 18:52:13 EST 2016 armv7l GNU/Linux root@am335x-evm:~# ethtool -S eth0 NIC statistics: Good Rx Frames: 276 Broadcast Rx Frames: 88 Multicast Rx Frames: 184 Pause Rx Frames: 0 Rx CRC Errors: 0 Rx Align/Code Errors: 0 Oversize Rx Frames: 0 Rx Jabbers: 0 Undersize (Short) Rx Frames: 0 Rx Fragments: 0 Rx Octets: 56666 Good Tx Frames: 76 Broadcast Tx Frames: 2 Multicast Tx Frames: 71 Pause Tx Frames: 0 Deferred Tx Frames: 0 Collisions: 0 Single Collision Tx Frames: 0 Multiple Collision Tx Frames: 0 Excessive Collisions: 0 Late Collisions: 0 Tx Underrun: 0 Carrier Sense Errors: 0 Tx Octets: 13402 Rx + Tx 64 Octet Frames: 28 Rx + Tx 65-127 Octet Frames: 217 Rx + Tx 128-255 Octet Frames: 48 Rx + Tx 256-511 Octet Frames: 26 Rx + Tx 512-1023 Octet Frames: 17 Rx + Tx 1024-Up Octet Frames: 16 Net Octets: 70068 Rx Start of Frame Overruns: 0 Rx Middle of Frame Overruns: 0 Rx DMA Overruns: 0 Rx DMA chan: head_enqueue: 1 Rx DMA chan: tail_enqueue: 316 Rx DMA chan: pad_enqueue: 0 Rx DMA chan: misqueued: 0 Rx DMA chan: desc_alloc_fail: 0 Rx DMA chan: pad_alloc_fail: 0 Rx DMA chan: runt_receive_buf: 0 Rx DMA chan: runt_transmit_buf: 0 Rx DMA chan: empty_dequeue: 0 Rx DMA chan: busy_dequeue: 132 Rx DMA chan: good_dequeue: 189 Rx DMA chan: requeue: 0 Rx DMA chan: teardown_dequeue: 0 Tx DMA chan: head_enqueue: 76 Tx DMA chan: tail_enqueue: 0 Tx DMA chan: pad_enqueue: 0 Tx DMA chan: misqueued: 0 Tx DMA chan: desc_alloc_fail: 0 Tx DMA chan: pad_alloc_fail: 0 Tx DMA chan: runt_receive_buf: 0 Tx DMA chan: runt_transmit_buf: 7 Tx DMA chan: empty_dequeue: 76 Tx DMA chan: busy_dequeue: 0 Tx DMA chan: good_dequeue: 76 Tx DMA chan: requeue: 0 Tx DMA chan: teardown_dequeue: 0 root@am335x-evm:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq 720000 root@am335x-evm:~# iperf -c 192.168.1.20 -P 5 -t 60 ------------------------------------------------------------ Client connecting to 192.168.1.20, TCP port 5001 TCP window size: 43.8 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.1.1 port 35562 connected with 192.168.1.20 port 5001 [ 5] local 192.168.1.1 port 35566 connected with 192.168.1.20 port 5001 [ 6] local 192.168.1.1 port 35568 connected with 192.168.1.20 port 5001 [ 4] local 192.168.1.1 port 35564 connected with 192.168.1.20 port 5001 [ 7] local 192.168.1.1 port 35570 connected with 192.168.1.20 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-60.0 sec 282 MBytes 39.3 Mbits/sec [ 4] 0.0-60.0 sec 279 MBytes 39.0 Mbits/sec [ 5] 0.0-60.0 sec 282 MBytes 39.4 Mbits/sec [ 6] 0.0-60.0 sec 280 MBytes 39.1 Mbits/sec [ 7] 0.0-60.0 sec 281 MBytes 39.3 Mbits/sec [SUM] 0.0-60.0 sec 1.37 GBytes 196 Mbits/sec root@am335x-evm:~# ethtool -S eth0 NIC statistics: Good Rx Frames: 456630 Broadcast Rx Frames: 96 Multicast Rx Frames: 240 Pause Rx Frames: 0 Rx CRC Errors: 0 Rx Align/Code Errors: 0 Oversize Rx Frames: 0 Rx Jabbers: 0 Undersize (Short) Rx Frames: 0 Rx Fragments: 0 Rx Octets: 32082719 Good Tx Frames: 1022789 Broadcast Tx Frames: 3 Multicast Tx Frames: 73 Pause Tx Frames: 0 Deferred Tx Frames: 0 Collisions: 0 Single Collision Tx Frames: 0 Multiple Collision Tx Frames: 0 Excessive Collisions: 0 Late Collisions: 0 Tx Underrun: 0 Carrier Sense Errors: 0 Tx Octets: 1544757762 Rx + Tx 64 Octet Frames: 55 Rx + Tx 65-127 Octet Frames: 456575 Rx + Tx 128-255 Octet Frames: 73 Rx + Tx 256-511 Octet Frames: 28 Rx + Tx 512-1023 Octet Frames: 10985 Rx + Tx 1024-Up Octet Frames: 1011703 Net Octets: 1576840481 Rx Start of Frame Overruns: 248 Rx Middle of Frame Overruns: 0 Rx DMA Overruns: 248 Rx DMA chan: head_enqueue: 1 Rx DMA chan: tail_enqueue: 456368 Rx DMA chan: pad_enqueue: 0 Rx DMA chan: misqueued: 144 Rx DMA chan: desc_alloc_fail: 0 Rx DMA chan: pad_alloc_fail: 0 Rx DMA chan: runt_receive_buf: 0 Rx DMA chan: runt_transmit_buf: 0 Rx DMA chan: empty_dequeue: 0 Rx DMA chan: busy_dequeue: 306077 Rx DMA chan: good_dequeue: 456241 Rx DMA chan: requeue: 1 Rx DMA chan: teardown_dequeue: 0 Tx DMA chan: head_enqueue: 993837 Tx DMA chan: tail_enqueue: 28952 Tx DMA chan: pad_enqueue: 0 Tx DMA chan: misqueued: 3711 Tx DMA chan: desc_alloc_fail: 0 Tx DMA chan: pad_alloc_fail: 0 Tx DMA chan: runt_receive_buf: 0 Tx DMA chan: runt_transmit_buf: 8 Tx DMA chan: empty_dequeue: 993837 Tx DMA chan: busy_dequeue: 7000 Tx DMA chan: good_dequeue: 1022789 Tx DMA chan: requeue: 3218 Tx DMA chan: teardown_dequeue: 0