Vivek Khera wrote:
On Jan 15, 2008, at 1:40 PM, John Baldwin wrote:
Where can one go to read up on what MSI is and how it helps us?
Is enabling it just setting a sysctl? Does that have to be done in
loader.conf or can it happen later?
loader.conf (though it is now default on in RELENG_6).
hw.pci.msi_enable=1
hw.pci.msix_enable=1
Thanks for the info. But can anyone point me to some documentation on
why MSI is good for me?
When implemented and used correctly in the hardware and driver, it a
lower overhead interrupt mechanism. It also expands the number of
interrupt vectors available, making interrupt sharing non-existent (for
right now, at least).
Scott
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