Software Packages and Installation
NetXtreme-E User’s Manual
February 26, 2018 • NetXtreme-E-UG100
Page 31
Linux Ethtool Commands
Note:
, ethX should be replaced with the actual interface name.
Table 19: Linux Ethtool Commands
Command
Description
ethtool -s ethX speed 25000 autoneg off
Set the speed. If the link is up on one port, the driver will
not allow the other port to be set to an incompatible
speed.
ethtool -i ethX
Output includes Package version, NIC BIOS version
(boot code).
ethtool -k ethX
Show offload features.
ethtool -K ethX tso off
Turn off TSO.
ethtool -K ethX gro off lro off
Turn off GRO / LRO.
ethtool -g ethX
Show ring sizes.
ethtool -G ethX rx N
Set Ring sizes.
ethtool -S ethX
Get statistics.
ethtool -l ethX
Show number of rings.
ethtool -L ethX rx 0 tx 0 combined M
Set number of rings.
ethtool -C ethX rx-frames N
Set interrupt coalescing. Other parameters supported
are: rx-usecs, rx-frames, rx-usecs-irq, rx-frames-irq, tx-
usecs, tx-frames, tx-usecs-irq, tx-frames-irq.
ethtool -x ethX
Show RSS flow hash indirection table and RSS key.
ethtool -s ethX autoneg on speed 10000 duplex full
“Auto-Negotiation Configuration”
for more details)
ethtool --show-eee ethX
Show EEE state.
ethtool --set-eee ethX eee off
Disable EEE.
ethtool --set-eee ethX eee on tx-lpi off
Enable EEE, but disable LPI.
ethtool -L ethX combined 1 rx 0 tx 0
Disable RSS. Set the combined channels to 1.
ethtool -K ethX ntuple off
Disable Accelerated RFS by disabling ntuple filters.
ethtool -K ethX ntuple on
Enable Accelerated RFS.
Ethtool -t ethX
Performs various diagnostic self-tests.
echo 32768 > /proc/sys/net/core/
rps_sock_flow_entries
echo 2048 > /sys/class/net/ethX/queues/rx-X/
rps_flow_cnt
Enable RFS for Ring X.
sysctl -w net.core.busy_read=50
This sets the time to busy read the device's receive ring
to 50 usecs. For socket applications waiting for data to
arrive, using this method can decrease latency by 2 or
3 usecs typically at the expense of higher CPU
utilization.
echo 4 > /sys/bus/pci/devices/0000:82:00.0/
sriov_numvfs
Enable SR-IOV with four VFs on bus 82, Device 0 and
Function 0.
