Doing this will cause your VFs to stop working until you reload the PF driver and may cause a spontaneous reboot of your system. This default mode is suitable for most applications. These correspond to the following product names: Use the ifconfig command to increase the MTU size. If such problems are encountered, you may disable the irqbalance daemon or upgrade to a newer kernel. The driver can limit the amount of interrupts per second that the adapter will generate for incoming packets.
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Receive interrupt reduction can improve Igv efficiency if properly tuned for specific network traffic. A whitepaper containing information on how to best configure your platform is available on the Intel website. Command Line Parameters If the driver is built as a module, the following optional parameters are used by entering them on the command line with the modprobe command using this syntax:.
To eliminate the potential for the hang ensure that RxIntDelay is set to zero. Other distributions may store this setting in a different location.
The value at offset 0xe de has bit 0 unset. Lknux during this process you are asked for the driver or module name, the name for the Linux Base Driver for the Gigabit family of adapters is e This parameter is only useful igh interrupt affinity is specified, otherwise some portion of the time the interrupt could run on a different core than the memory is allocated on, causing slower memory access and impacting throughput, CPU, or both.
To eliminate the potential for the hang, ensure that InterruptThrottleRate is set no greater than 75, and is not set to 0. Install the ee driver using the instructions in the ee section.
LLI allows for immediate generation of an interrupt upon processing receive packets that match certain criteria as set by the linuc described below. The moderation value should be at least as large as the expected time for the driver to process an interrupt.
Dynamic interrupt throttling is only applicable to adapters operating in MSI or Legacy interrupt mode, using a single receive queue.
Jumbo Frames support is enabled by changing the MTU to a value larger than the default of When a spoofed packet is detected the PF driver will send liunx following message to the system log displayed by the “dmesg” command:.
If you are required to use a 2. Using Jumbo frames at 10 or Mbps is not supported and may result in poor performance or loss linuux link. This results in unbalanced receive traffic.
LLI parameters are not enabled when Legacy interrupts are used. The range of to interrupts per second works on a majority of systems and is a good starting point, but the optimal value will be platform-specific. The user can enable it at compile time to add support for LRO from the driver. If traffic falls in the “Low latency” or “Lowest latency” class, the InterruptThrottleRate is increased stepwise to This is a 3rd party limitation.
Do not use MSI-X with the 2. The improper writeback does not occur on the first descriptor in a system memory cache-line, which is typically 32 bytes, or 4 descriptors long.
After installing the driver, if your Intel Ethernet Network Connection is not working, verify that you have installed the correct driver.
Degradation in throughput performance may be observed in some Jumbo frames environments. The Linux base drivers support the 2. Setting InterruptThrottleRate to a value greater or equal to will program the adapter to send out a maximum of that many interrupts per second, even if more packets have come in. If you currently have the kgb driver installed and need to install ee, perform ifb following:.
This driver supports receive multiqueue on all kernels that support MSI-X. Ports 1 and 2 don’t show any errors and will pass traffic.
Kernel panics and instability may be observed on any MSI-X hardware if you use irqbalance with kernels between 2. As an example, if you install the ee driver for two Gigabit adapters eth0 and eth1 and want to set linuux interrupt mode to MSI-X and MSI respectively, add the following to modules.
This script will verify that the adapter is applicable to the fix and if the fix is needed or not. The user can turn off this parameter in supported chipsets.
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