Folks,
With Sandybrdige, a PCI card has a natural affinity to one CPU. How can I programmatically determine which CPU it is, so that I can affinitize my program to the right CPU?
Many thanks!
Hi,
in Linux you can identify which processor your PCIe device is connected to by reading the "/sys/devices/[PCI root]/[PCIe function]/numa_node" or "/sys/class/[device class]/[interface]/device/numa_node" virtual files. However BIOS should support the proper ACPI feature for such detection, otherwise numa_node will report -1.
Best regards,
Roman
in Linux you can look it up in the /sys/devices/[PCI root]/[PCIe function]/numa_node virtual file. However BIOS should support
the proper ACPI feature, otherwise you will read -1.
for network card devices it is also available through "/sys/class/net/[interface]/device/numa_node" file.