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Old 10-07-08, 11:52 PM   #3
SilentLexx
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Join Date: Dec 2007
Location: Ukraine / Sumy
Posts: 112
Default Re: What better, PCI-X MSI or Wired IRQ? [177.80]

I'm testing now MSI. Very interesting... Performance is good, for stability will see I have now 2 devices on msi interrupts bus:

cat /proc/interrupts | grep -i msi
221: 37100 202 PCI-MSI-edge eth1
222: 51351 77 PCI-MSI-edge nvidia


PS:
Message Signaled Interrupts (MSI and MSI-X) (PCI_MSI)

This allows device drivers to enable MSI (Message Signaled
Interrupts). Message Signaled Interrupts enable a device to
generate an interrupt using an inbound Memory Write on its
PCI bus instead of asserting a device IRQ pin.

Use of PCI MSI interrupts can be disabled at kernel boot time
by using the 'pci=nomsi' option. This disables MSI for the
entire system.
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PS: I'm sorry, but my english is very bad
openSUSE 11.1, Gigabyte GA-M57SLI-S4, AMD Athlon64 X2 +4800@2500MHz, 2 GB RAM, GeForce 9800GT.
openSUSE 11.0, MSI M670X, AMD Sempron +3600@2000MHz, 2 GB RAM, GeForce 6100 Go.
Ubuntu 8.10, Albatron KM266Pro, AMD AthlonXP +1800@1600MHz, 1 GB RAM, GeForce 4 MX440.
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