Steven A. Falco wrote: > Hmmm. IRQ4 is "PCI ExternalCommand Write"? But I'm not using PCI. > Here is the output: > > # ./irqloop > NULL ->unmask handler, IRQ 4, chip <NULL> > Test mode: user-space task > Port type: serial > Port address: 0x3f8 > Port IRQ: 4
Well, irqloop is preconfigured for boring x86 PCs, not thrilling PowerPC platforms :). It assumes there is a 16550-based UART at the given address using the given IRQ, but I would bet this doesn't apply to your board. Please check doc/txt/irqbench.txt on the requirements. What interface do you plan to use for the IRQ latency test? Maybe it is possible to extend the benchmark driver. Jan
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