Post as a guest Name. Now, the igb driver is different to ixgbe which is 10GBps one. All the Intel ethernet drivers all you to set the InterruptThrottleRate value at run time via the ethtool -C ethX rx-usecs N command, where N is the time in microseconds between each interrupt, so if you want up to , interrupts per second you’d set it to In linux try this: These settings are old and outdated and do not work insmod ee.
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Post as a guest Name. A good place to look for docs is in your kernel source under Documentation, available on the web here: IOAT enabled but not being used with Linux? For example, to set the packet size to 1, iotadma The epoll interface is designed to easily scale to large numbers of file descriptors.
Written by Joe Damato July 28th, at 3: GreenReaper 1 12 Now I am facing issue that both drivers do not use this channels at all. You can check if DCA is enabled: High-speed networking can create thousands koatdma interrupts per second, all of which tell the system something it already knew: Just compile it from the source.
For example, to set the packet size to 1, use:.
I/O Acceleration Technology
You can view the current setting with: NAPI allows drivers to run with some interrupts disabled during times of high traffic, with a corresponding decrease in system load. Sign up using Email and Password. This article is going to address some kernel and driver tweaks that are interesting and useful. Sign up using Facebook. All the Intel ethernet drivers all you to set the InterruptThrottleRate value at ljnux time via the ethtool -C ethX rx-usecs N command, where N is the time in microseconds between each interrupt, so if you want up tointerrupts per second you’d set it to This is useful because you can pin the interrupt handlers for your NICs to specific CPUs so that when a shared resource is touched a lock in the network stack and loaded to a CPU cache, the next time the handler runs, it will be put on ioatma same CPU avoiding costly cache invalidations that can occur if the handler is put on a different CPU.
I/O Acceleration Technology – Wikipedia
How big are the packets you’re sending through? Does the motherboard chipset have support for IOAT?
networking – IOAT enabled but not being used with Linux? – Server Fault
These settings are old and outdated and do not work insmod ee. This feature allows the kernel to offload iooatdma work of dividing large packets into smaller packets to the NIC.
Some drivers need you to explicitly specify NAPI in the kernel config or on the command line when compiling the driver. Reducing the rate at which the timer fires allows for fewer interruptions of your running processes. Doing this ensures that the data loaded into the CPU cache by the interrupt handler can be used without invalidation by the process; extremely high cache locality is achieved.
The processes can then be restarted by your monitor keeping downtime to a minimum when unexpected events occur. Same is for all channels.
CONFIG_INTEL_IOATDMA: Intel I/OAT DMA support
The ee driver allows you to pass a command line option InterruptThrottleRate when loading the module with insmod. So why is dma channels not getting used? This option is particularly useful for servers with multiple CPUs where processes are not running interactively. In linux try this: Marin — Built for WordPress.