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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I believe the suggestion here would be to try the new "rx_low_latency=3D1" = option enabled with DPDK 21.11: * Low Rx latency (default 0) vRAN workloads require low latency DPDK interface for the front haul interf= ace connection to Radio. By specifying 1 for parameter rx_low_latency, each= completed Rx descriptor can be written immediately to host memory and the = Rx interrupt latency can be reduced to 2us: -a 0000:88:00.0,rx_low_latency=3D1 As a trade-off, this configuration may cause the packet processing performa= nce degradation due to the PCI bandwidth limitation. If they are using an old DPDK version, they can try to backport below patch http://patchwork.dpdk.org/project/dpdk/patch/20210924093429.12068-1-alvinx.= zhang@intel.com/ Thanks --_000_MW3PR11MB4761E06FFB73CA9699DD1CE8804D9MW3PR11MB4761namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I believe the suggestion here would be to try the ne= w “rx_low_latency=3D1” option enabled with DPDK 21.11:

 

&mid= dot;  &nbs= p;     Low Rx latency (default 0)

vRAN workloads require low latency D= PDK interface for the front haul interface connection to Radio. By specifyi= ng 1 for parameter rx_low_latency, each completed Rx descriptor can be written immediately to host memory and= the Rx interrupt latency can be reduced to 2us:

-a 0000:88:00.0,rx_low_latency=3D1

As a trade-off, this configuration m= ay cause the packet processing performance degradation due to the PCI bandw= idth limitation.

 

        

If they are using an old DPDK version, they can try to = backport below patch

http://patchwork.dpdk.org/= project/dpdk/patch/20210924093429.12068-1-alvinx.zhang@intel.com/<= /o:p>

 

Thanks

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