In dynamic conservative mode, the InterruptThrottleRate value is set to for traffic that falls in class “Bulk traffic”. If the traffic is mostly transmit or mostly receive, the interrupt rate could be as high as Kernel panics and instability may be observed on any MSI-X hardware if you use irqbalance with kernels between 2. This may increase network latency but also increases the chances that the system will enter a lower power state. EEE saves energy by putting the device into a low-power state when the link is idle, but only when the link partner also supports EEE and after the feature has been enabled during link negotiation. For questions related to hardware requirements, refer to the documentation supplied with your Intel Gigabit adapter.
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Install the ee driver using the instructions in the ee section.
The default value for each parameter is generally the recommended setting, unless otherwise noted. Dynamic interrupt throttling is only applicable to adapters operating in MSI or Legacy interrupt mode, using a single receive queue. This setting is not saved across reboots.
If lknux traffic is mostly transmit or mostly receive, the interrupt rate could be as high as MSI-X is required for multiple queue support, and some kernels and combinations of kernel. If the driver load fails to enable a specific interrupt mode, the driver will try other interrupt modes, from least to most compatible.
Linux source code: drivers/net/ethernet/intel/igbvf/netdev.c (v) – Bootlin
Multiqueue In this mode, a separate MSI-X vector is allocated for each queue and one for “other” interrupts such as link status change and errors. Increasing this value allows the driver to queue more transmits. As an example, if you install the igb driver for two Gigabit adapters eth0 and eth1 and want to set the interrupt mode to MSI-X and MSI respectively, add the following to modules.
In order to disable receive flow control using ethtool, you must turn off auto-negotiation on the same command line. To resolve this issue build the driver step 4 above using the command:.
Linux Driver for Intel® Gigabit Network Connections
For the build to work properly, the currently running kernel MUST match the version and configuration of the installed kernel sources. If you are required to use a 2. Build error with Asianux 3. This value specifies the number of receive buffer descriptors allocated by the driver.
To reduce the impact, the packet buffer sizes and kinux flow control settings are modified accordingly. This workaround skips resetting the Phy at shutdown for the initial silicon releases of ICH8 systems.
Linux* Base Drivers for Intel® Ethernet Network Connection
Transmit interrupt reduction can improve CPU efficiency if properly tuned for specific network traffic. Channel Bonding documentation can be found in the Linux kernel source: This may increase network latency but also increases the chances that the system will enter a lower power state. If you believe your system needs to disable this style of interrupt, the driver can be built and installed with the command:.
If this occurs, the driver will report a “TX Timeout” and reset the adapter, after which the transmit flow will restart, though data may have stalled for as much as 10 seconds before it resumes.
If your version of e is 7.
For this driver version, in order to enable WoL, the ee driver must be loaded prior to shutting down or suspending the system. Load the module using either the insmod or modprobe command: Forcing master or forcing slave mode will improve time-to-link. This results in unbalanced receive traffic. Some Intel gigabit adapters that support Jumbo Frames have a frame size limit of bytes, with a corresponding MTU size limit of bytes. If the link partner is forced to a specific speed and duplex, then this parameter should not be used.
These keywords are Speed, Duplex, and AutoNeg. Jumbo Frames support is enabled by changing the MTU to a value larger than the default of A receive buffer is also allocated for each descriptor and can be either,or bytes, depending on the MTU setting. To build igb driver with DCA: In order to see network driver link messages on your console, set dmesg to eight by entering the following:. As an example, if you install the e driver for two Gigabit adapters eth0 and eth1 and set the speed and duplex to 10full and half, add the following to modules.