[I added linux-pci, where more PCI-savvy people will see it.] On Wednesday, June 02, 2010 06:08:33 am Bert dd wrote: > Hi, > Is there a way to change irq numbers of pcie cards ? > > I have a supermicro machine with 2 raid cards (lsi 9260-8i and lsi 9260-8e) and > one nvidia GTX480 graphics card. > The problem is that all these pcie cards are assigned the same irq number, > and thus all the interrupts are routed to the same cpu which can not > handle this. > If I replace the nvidia GTX480 with an older graphics card(too old for > our purposes (GTX295)), the graphics card gets a different irq number > than the raid cards, the interrups of the graphics card are handled by > a different cpu than those of the raid cards, and the read/write speed > of the raid increases. > I am reading/writing at 2.5 GB/s to the raid and I am uploading > textures at 0.5 GB/s to the graphics hardware. > Is there a way to change the irq numbers of the pcie cards ? > I am using IOAPIC for interrupt routing. I would think performance-oriented PCIe devices would be using some sort of MSI, but I'm not really an expert in that area. Can you post your /proc/interrupts and complete dmesg log in case nobody jumps in with an obvious answer? Bjorn > I am using ubuntu - kernel version 2.6.31-14-generic. > > thanks, > Bert De Decker > bert.dedecker@xxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
