Useful only if RxIntDelay is non-zero, this value ensures that an interrupt is generated after the initial packet is received within the set amount of time. For situations where low latency is vital such as cluster or grid computing, the algorithm can reduce latency even more when InterruptThrottleRate is set to mode 1. If its not working there, then this seems like an upstream Intel bug. Install the ee driver using the instructions in the ee section. Tested both kernels http: This value delays the generation of transmit interrupts in units of 1. In dynamic conservative mode, the InterruptThrottleRate value is set to for traffic that falls in class “Bulk traffic”.

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Package Find… Status Importance Invalid. 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.

Linux Driver for Intel® Gigabit Network Connections

The default operation is auto-negotiate. When igbvf is loaded with default settings and multiple adapters are in use simultaneously, the CPU utilization may increase non-linearly. Adapters that have 4 ports behind a PCIe bridge may be incompatible with some systems.

Each descriptor is 16 bytes. Insfall has a possible negative performance impact, which may be compensated for by allocating more descriptors using the TxDescriptors module parameter. This parameter is a bit mask that specifies which speed and duplex settings the board advertises.

Linux* Base Drivers for Intel® Ethernet Network Connection

The default behavior of the driver previously assumed a static InterruptThrottleRate value ofproviding a good fallback value for all traffic igg, but lacking in small packet performance and latency.


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If you experience loss of packets, lower the MTU size. As this value decreases one may want to consider increasing the TxDescriptors value to maintain the same amount of frame memory.

Load the module using either the insmod or modprobe command: LLI parameters are not enabled when Legacy interrupts are used.

The script can be downloaded at http: If the bytes per second rate is approximately equal, the interrupt rate will drop as low as interrupts per second. The driver has two adaptive modes setting 1 or 3 in which it dynamically adjusts the InterruptThrottleRate value based on the traffic that it receives. Tim Gardner timg-tpi wrote on Marking invalid since the issue does not appear to be related to the driver.

This issue won’t be seen on 32bit version of EL5, as in that case, the kernel sees that RAM is located around the MB window and avoids using the mmconfig space. If 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 Many popular Linux distributions ship with tools to make these changes for you.

It should be used when you wish to control which speed and duplex combinations are advertised during the auto-negotiation process.

A link between two EEE-compliant devices will result in periodic bursts of data followed by periods where the link is in an idle state. You need to log in to change inwtall bug’s status. Increasing this value allows the driver to buffer more incoming packets, at the expense of increased system memory utilization.


Changed in linux Ubuntu Trusty: There is a known hardware compatibility issue on some systems with RHEL3 kernels. Kernel panics and instability may be observed on any MSI-X hardware if you use irqbalance with kernels between 2. Useful only if RxIntDelay is non-zero, this value ensures that an interrupt is generated after the initial packet is received within the set amount of time.

In addition the number of queues available for RSS is limited if this is set to 1 or greater. No upgrade log present probably fresh install UserGroups:. Try installing these 2: For more information about ibb InterruptThrottleRate parameter, see the application note at: Doing this will cause your VFs to stop working until you reload the PF driver and may cause a spontaneous reboot of your system.

There are three classes defined: Randomly one, two, all or none of the nics will have a network link established means lights on the nic are dark.