When trying to compile the driver by running make install, the following error may occur: In simplified mode the interrupt rate is based on the ratio of tx and rx traffic. 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 All interrupts are throttled via interrupt moderation. Several adapters with the chipset display “TX unit hang” messages during normal operation with the e driver. Traffic on ports 1 and 2 may be slower than expected and ping times higher than expected.
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TxDescriptorStep 1 use every Tx Descriptor 4 use every 4th Tx Descriptor 1 use every Tx Descriptor On certain non-Intel architectures, it has been observed that intense TX traffic bursts of short packets may result in an improper descriptor writeback. Three ogb are used to control the speed and duplex configuration.
Linux Driver for Intel® Gigabit Network Connections
This reduces interrupt load on the system and can lower CPU utilization under heavy load, but will increase latency as packets are not processed as quickly. As this value decreases one may want to consider increasing the TxDescriptors value to maintain the same amount of frame memory.
The value at gib 0xe de has bit 0 unset.
All hardware requirements listed apply to use with Linhx. For more information about the InterruptThrottleRate parameter, see the application note at: Then follow the appropriate steps for building, installing, and configuring the driver. Can be either one or two-directional. Allows changing the interrupt mode at module load time, without requiring a recompile.
These keywords are Speed, Duplex, and AutoNeg. If you have lknux interfaces in a server, either turn on ARP filtering by entering:. IntMode controls allow load time control over the type of interrupt registered for by the driver.
Transmit interrupt reduction can improve CPU efficiency if properly tuned for specific network traffic.
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. Several adapters with the chipset display “TX unit hang” messages during normal operation with the ee driver.
FreeBSD Manual Pages
To resolve this issue build the driver step 4 above using the command:. The default behaviour of the driver previously assumed a static InterruptThrottleRate value oinuxproviding a good fallback value for all traffic types, but lacking in small packet performance and latency.
After installing the driver, if your Intel Network Connection is not working, verify that you have installed the correct driver.
Increasing this value allows the driver to buffer more incoming packets, at the expense of increased system memory utilization. If you experience loss of packets, lower the MTU size. Otherwise the driver can be loaded once and will be safe, but unloading iyb will lead to the issue. Depending on the available system resources, the request for a higher number of receive descriptors may be denied.
There are no workarounds for this problem in this network configuration.
Linux source code: drivers/net/ethernet/intel/igb/igb_main.c (v) – Bootlin
It is most effective in an environment with many small transactions. 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 igbvf.
If such problems are encountered, you may disable the irqbalance daemon or upgrade to a newer kernel. This example applies to the Red Hat distributions; other distributions may store this setting in a different location.
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. An interrupt is sent to the PF driver notifying it of the spoof attempt.
Using Jumbo frames at 10 or Mbps is not supported and may result in poor performance or loss of link. Each descriptor is 16 bytes. 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 ilnux using this syntax:.
Increasing this value allows the driver to queue more transmits. TxDescriptors This value is the number of transmit descriptors allocated by the driver.