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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I have an issue with DPDK 24.11.1 and 2 port 100G Intel NIC (E810-C) on 22 = core CPU dual socket server. There is a dedicated CPU core to get the packets from DPDK using rte_eth_rx= _burst() and enqueue the mbufs into a worker ring Q. This thread does noth= ing else. The NIC is dropping packets at 8.5 Gbps per port. Studying the perf report, I was interested in the common_ring_mc_dequeue().= Perf tool shows common_ring_mc_dequeue() 92.86% Self and 92.86% Children. I see further with perf tool rte_ring_enqueue_bulk() and rte_ring_enqueue_b= ulk_elem(). These are at 0.00% Self and 0.05% Children. Perf tool shows rte_ring_sp_enqueue_bulk_elem (inlined) which is what I wan= ted to see (Single producer) representing the enqueue of the mbufs pointers= to the worker ring Q. Is it possible to change the common_ring_mc_dequeue() to common_ring_sc_deq= ueue()? Can it be set to one consumer on single Queue 0. I believe this is limiting DPDK from reaching 90 Gbps or higher in my setup= , which is my goal. I made sure the E810-C firmware was up to date, NIC FW Version: 4.80 0x8002= 0543 1.3805.0 Perf report shows: - 99.65% input_thread - 99.35% rte_eth_rx_burst (inlined) - ice_recv_scattered_pkts 92.83% common_ring_mc_dequeue Any thoughts or suggestions? Thanks, Ed --_000_CH3PR01MB8470603D8C5E5DEE5BDB5EBB8F66ACH3PR01MB8470prod_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

I have an issue with DPDK 24.11.1 and 2 port 100G In= tel NIC (E810-C) on 22 core CPU dual socket server.

 

There is a dedicated CPU core to get the packets fro= m DPDK using rte_eth_rx_burst() and enqueue the mbufs into a worker ring Q.=   This thread does nothing else.  The NIC is dropping packets at = 8.5 Gbps per port.

 

Studying the perf report, I was interested in the co= mmon_ring_mc_dequeue().  Perf tool shows common_ring_mc_dequeue() 92.8= 6% Self and 92.86% Children.

 

I see further with perf tool rte_ring_enqueue_bulk()= and rte_ring_enqueue_bulk_elem().  These are at 0.00% Self and 0.05% = Children.

Perf tool shows rte_ring_sp_enqueue_bulk_elem (inlin= ed) which is what I wanted to see (Single producer) representing the enqueu= e of the mbufs pointers to the worker ring Q.

 

Is it possible to change the common_ring_mc_dequeue(= ) to common_ring_sc_dequeue()?  Can it be set to one consumer on singl= e Queue 0.

 

I believe this is limiting DPDK from reaching 90 Gbp= s or higher in my setup, which is my goal.

 

I made sure the E810-C firmware was up to date, NIC = FW Version: 4.80 0x80020543 1.3805.0

 

Perf report shows:

   - 99.65% input_thread   =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =           

      - 99.35% rte_eth= _rx_burst (inlined)         &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;            = ;            &n= bsp;     

        &nbs= p;- ice_recv_scattered_pkts        =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;            =             &nb= sp;         

        &nbs= p;     92.83% common_ring_mc_dequeue  &n= bsp;            = ;            &n= bsp;        

 

Any thoughts or suggestions?

 

Thanks,

Ed

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