User Manual

Driver FeaturesRev 2.2-1.0.1
Mellanox Technologies
134
4.19 Dynamically Connected Transport Service
Dynamically Connected transport (DCT) service is an extension to transport services to enable a
higher degree of scalability while maintaining high performance for sparse traffic. Utilization of
DCT reduces the total number of QPs required system wide by having Reliable type QPs dynam
-
ically connect and disconnect from any remote node. DCT connections only stay connected
while they are active. This results in smaller memory footprint, less overhead to set connections
and higher on-chip cache utilization and hence increased performance. DCT is supported only in
mlx5 driver.
ethtool -C eth<x> [rx-usecs N] [rx-
frames N]
Sets the interrupt coalescing settings when the adaptive
moderation is disabled.
Note: usec settings correspond to the time to wait after the
*last* packet is sent/received before triggering an inter
-
rupt.
ethtool -a eth<x> Queries the pause frame settings.
ethtool -A eth<x> [rx on|off] [tx
on|off]
Sets the pause frame settings.
ethtool -g eth<x> Queries the ring size values.
ethtool -G eth<x> [rx <N>] [tx
<N>]
Modifies the rings size.
ethtool -S eth<x> Obtains additional device statistics.
ethtool -t eth<x> Performs a self diagnostics test.
ethtool -s eth<x> msglvl [N] Changes the current driver message level.
ethtool -T eth<x> Shows time stamping capabilities
ethtool -l eth<x> Shows the number of channels
ethtool -L eth<x> [rx <N>] [tx
<N>]
Sets the number of channels
ethtool --show-priv-flags eth<x> Shows driver private flags and their states (on/off)
Private flags are:
• pm_qos_request_low_latency
• mlx4_rss_xor_hash_function
• qcn_disable_32_14_4_e
ethtool --set-priv-flags eth<x>
<priv flag> <on/off>
Enables/disables driver feature matching the given private
flag.
Table 8 - ethtool Supported Options
Options Description