Features; Tuning - Xilinx Alveo X3522 User Manual

Features

Some features not normally used in low latency deployments because of their adverse impact
have been removed. The following table gives a comparison of features on the X3522 and the
X2522 (its predecessor):
Table 3: Comparison of features on the X3522 and the X2522
Feature
Size
Interfaces
PCIe vendor ID
OS support
Net driver name
Onload support
TCPDirect support
ef_vi support
Sfptpd support
Oscillator
Hardware timestamps
Jumbo frame support
RX queues
TX types
Number of filters
Types of filter
Dropped on NIC
Duplicate multicast filters
PF-VLAN
Multi-PF mode
SR-IOV support
Hardware TX checksum offload
You can upgrade the X3522 by enabling hybrid mode. You can then add your own application
code to the datapath in the FPGA, meaning it can be easily customized to add new features.

Tuning

Changes in the design and behavior of the X3522 mean that it might require different system
tuning settings from its predecessors.
UG1523 (v1.0) October 18, 2022
Alveo X3522 User Guide
X2522
Low-profile, half length
2 SFP+ cages (2×10/25G)
1924 (Solarflare)
Linux, Windows, VMWare
sfc
Yes
Yes
Yes
Yes
Discrete Stratum 3
Yes
Yes
Multiple separate queues
DMA, PIO, CTPIO
16384 total
3 or 5 part IP, MAC address, all-unicast,
all-multicast, all-discards
Unsubscribed/unwanted
Yes
Yes
Yes
Yes
Yes
Chapter 3: What's New
X3522
Low-profile, half length
2 DSFP+ cages (2×2×10G)
10ee (Xilinx)
Linux
xilinx_efct
Yes
Yes
Yes
Yes
Discrete Stratum 3
Yes
No
Shared queue
CTPIO only
256 per port
3-part IP, all multicast
Explicit only
No
No
No
No
No
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