Re: [dpdk-dev] DMAR errors when running testpmd

[Tomasz K <tomasz.kasowicz@gmail.com>]

Hi Anatoly.

Yes I do have iommu=on set when booting kernel. This is one of
prerequisites to have SR-IOV running.
Below is the cmdline output

cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.11.0-20-generic
root=UUID=c70fa456-ee10-43e5-9f07-4dbb372dcee3 ro quiet splash iommu=pt
intel_iommu=on default_hugepagesz=1G hugepagesz=1G hugepages=4 vt.handoff=7

Thanks
Tomasz


2014-05-07 16:07 GMT+02:00 Burakov, Anatoly <anatoly.burakov@intel.com>:

> Hi Tomasz
>
> It looks like you have your kernel booted with iommu=on. Please check your
> /proc/cmdline to make sure you didn't accidentally selected the wrong
> bootloader entry.
>
> > We're trying to run testpmd application on HP Proliant DL380P Gen 8
> server.
> > We've enabled SR-IOV in BIOS and set appropriate flags when booting
> kernel
> > (iommu=pt intel_iommu=on) The NIC we are using is 82599EB (2 ports, 10Gb
> > SFP+)
> >
> > When running testpmd application we always encouter DMAR error in dmesg
> >
> > [ 186.302866] dmar: DRHD: handling fault status reg 2 [  186.302872]
> dmar:
> > DMAR:[DMA Read] Request device [07:00.1] fault addr
> > 1f73220000
> > [  186.302872] DMAR:[fault reason 06] PTE Read access is not set [
> > 186.302875] dmar: DMAR:[DMA Read] Request device [07:00.0] fault addr
> > 1f73200000
> > [  186.302875] DMAR:[fault reason 06] PTE Read access is not set [
> > 324.759520] dmar: DRHD: handling fault status reg 202 [  324.759525]
> dmar:
> > DMAR:[DMA Read] Request device [07:00.1] fault addr
> > 1f73220000
> > [  324.759525] DMAR:[fault reason 06] PTE Read access is not set [
> > 324.759528] dmar: DMAR:[DMA Read] Request device [07:00.0] fault addr
> > 1f73200000
> > [  324.759528] DMAR:[fault reason 06] PTE Read access is not set
>
> Best regards,
> Anatoly Burakov
> DPDK SW Engineer
>
>
>
>