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  1. Xen PVHVM drivers are in upstream Linux kernel,...

    Xen PVHVM drivers are in upstream Linux kernel, so I believe they used PVHVM. If they didn't, then the benchmark is pointless, because they used VirtIO for KVM guests! (VirtIO is the PV driver for...
  2. Where can I get the VM cfgfiles and...

    Where can I get the VM cfgfiles and hypervisor/system settings for this benchmark? I'd like to run some benchmarks myself with same settings.
  3. Xen HVM is actually faster than Xen PV for some...

    Xen HVM is actually faster than Xen PV for some workloads.. it really depends on the workload.
    (And vice versa; for some workloads Xen PV is faster than HVM).

    If the workload consists of...
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    The Xen ACPI cpufreq / power management patches...

    The Xen ACPI cpufreq / power management patches are now included in upstream Linux 3.4.x and later kernel versions. The driver in question is called "xen_acpi_processor.ko".
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    The Xen ACPI cpufreq / power management patches...

    The Xen ACPI cpufreq / power management patches are now included in upstream Linux 3.4.x and later kernel versions. The driver in question is called "xen_acpi_processor.ko".
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    xen.org re-run of the Phoronix benchmark

    Here's a re-run of the Phoronix Xen vs. KVM vs. VirtualBox benchmarks, with the missing Xen dom0 ACPI cpufreq patches added to the dom0 kernel:...
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    xen.org re-run of the Phoronix benchmark

    Here's a re-run of the Phoronix Xen vs. KVM vs. VirtualBox benchmarks, with the missing Xen dom0 ACPI cpufreq patches added to the dom0 kernel:...
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    Xen ACPI cpufreq patches

    The power consumption differences are explained by the lack of Xen dom0 ACPI cpufreq patches in the current upstream Linux kernel v3.x. This was already pointed out earlier in the comments for the...
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    That performance difference could be caused by...

    That performance difference could be caused by missing Xen acpi cpufreq patches from upstream Linux 3.x kernels. The patches in question are still work-in-progress and are currently planned for...
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    The first page of the article says: "The only Xen...

    The first page of the article says: "The only Xen issue encountered when testing it with an Ubuntu 11.10 guest and host was the need for manually loading the xen-blkfront driver for disk support.".
    ...
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    what disk backend did this benchmark use in dom0?...

    what disk backend did this benchmark use in dom0? file: ?
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    Xen PVHVM drivers

    First page of the articly says:
    "The only Xen issue encountered when testing it with an Ubuntu 11.10 guest and host was the need for manually loading the xen-blkfront driver for disk support."

    So...
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