On 2022-01-07 21:48, Anantharam, Arjun wrote:
Hi,
I believe the suggestion here would be to try the new
"rx_low_latency=1" option enabled with DPDK 21.11:
ยท Low Rx latency (default 0)
vRAN workloads require low latency DPDK interface for the front haul
interface 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=1
As a trade-off, this configuration may cause the packet processing
performance 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/[email protected]/
Thanks
Hi,
We are concerned about dropping the traffic, by limiting its rate to 22
to 24 gbps, rather than allowing complete 40gbps, a formula for cir,
pir, ebs and cbs would be more appreciated.
Thanks.
