Dell Mellanox Family of Adapters - Manual (Page 50)

Driver Installation and Configuration Rev 1.1
Mellanox Technologies 50
4.2.9 Ethernet Performance Counters
Counters are used to provide information about how well an operating system, an application, a
service, or a driver is performing. The counter data helps determine system bottlenecks and fine-
tune the system and application performance. The operating system, network, and devices pro-
vide counter data that an application can consume to provide users with a graphical view of how
well the system is performing.
The counter index is a QP attribute given in the QP context. Multiple QPs may be associated with
the same counter set, If multiple QPs share the same counter its value represents the cumulative
total.
• ConnectX®-3 support 127 different counters which allocated:
• 4 counters reserved for PF - 2 counters for each port
• 2 counters reserved for VF - 1 counter for each port
• All other counters if exist are allocated by demand
• RoCE counters are available only through sysfs located under:
• # /sys/class/infiniband/mlx4_*/ports/*/counters/
• # /sys/class/infiniband/mlx4_*/ports/*/counters_ext/
ethtool -C eth [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 Queries the pause frame settings.
ethtool -A eth [rx on|off] [tx
on|off] Sets the pause frame settings.
ethtool -g eth Queries the ring size values.
ethtool -G eth [rx ] [tx
] Modifies the rings size.
ethtool -S eth Obtains additional device statistics.
ethtool -t eth Performs a self diagnostics test.
ethtool -s eth msglvl [N] Changes the current driver message level.
ethtool -T eth Shows time stamping capabilities
ethtool -l eth Shows the number of channels
ethtool -L eth [rx ] [tx
] Sets the number of channels
Table 7 - ethtool Supported Options
Options Description