On Thu, Feb 6, 2014 at 5:22 AM, shiv prakash Agarwal <chhotu.shiv@xxxxxxxxx> wrote: > Hi All, > > Below queries: > > 1. Is there a way to find current PCIE bandwidth utilization? i.e How > much of supported bandwidth is being used? I suspect there is vendor-specific support for measuring things like this, but I'm not aware of anything standardized or supported by Linux. I did find this: http://pcitop.berlios.de/, but I think it's only for HP Itanium hardware. I wonder if any of that functionality would make sense in "perf"? > 2. Can it happen that a device runs at lower speed that what is > practically possible? i.e suppose a GPU can go upto 100 MBps, but it > needs to run at 50 MBps only? I'm not quite sure what you're asking, but it is possible to plug a PCIe card into a slot larger than required, i.e., the slot may support more lanes than the card: http://en.wikipedia.org/wiki/PCI_Express#Form_factors Bjorn -- 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
