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mstlink -d <device> --port_type PCIE --margin --measure_time
Getting PCIe links info:
mstlink -d /dev/mst/mt41682_pciconf0 --port_type PCIE --show_links
Valid PCIe Links
----------------
: depth, pcie_index, node, port
Link
1
: 3, 0, 0,
60
Link
2
: 3, 0, 1,
61
Link
3
: 3, 0, 2,
62
..
To query information for a specific link, the depth, pcie_index and node for the link must be
specified:
mstlink -d /dev/mst/mt41682_pciconf0 --port_type PCIE --depth
PCIe Operational (Enabled) Info
-------------------------------
Depth, pcie index, node : 3, 0,
Link Speed Active (Enabled) : 8G-Gen
Link Width Active (Enabled) : 2X (16X)
Device Status : N/A
EYE Opening Info (PCIe)
-----------------------
Physical Grade : 84,
84
Height Eye Opening [mV] : 1194,
Phase Eye Opening [psec] : 84,
Serdes Tuning Transmitter Info (PCIe)
-------------------------------------
: Pol,tap0,tap1,tap2,bias,preemp_mode,reg,leva
Lane
0
:
1,0,114,6,15,1,11,9
Lane
1
:
0,0,116,4,15,1,11,9
To print the output in JSON format:
mstlink -d <device> --show_module --json
To show ports group map (for NVIDIA Quantum and NVIDIA Spectrum-2):
mstlink –d<device> --show_tx_group_map 0
To assign ports to a specific group on NVIDIA Quantum and NVIDIA Spectrum-2
mstlink –d <device> --tx_group_map 1 –ports 1,2,3,5,4,8,7,8,9,10,11
Margin Scan Tool
The margin scan tool is used for scanning PCIe [Gen4 speed] or Network ports [EDR\25G or HDR\PAM4
speeds].
If the margin scan fails with this message (Eye scan not completed), perform a reboot and
run the scan again.
To enable the margin scan with measure time 10 seconds:
mstlink –d <device> --port_type PCIE –margin –measure_time 10
To enable the margin scan for Multi-host or Socket Direct systems through:
•
depth, pcie_index and node:
mstlink –d <device> --port_type PCIE –depth 0 –pcie_index 1 –node 0 –margin –measure_time 30
1
3
(16G-Gen 4)
1194
84
10
--lane
0
3
--pcie_index
0
--node
1
--show_serdes_tx --show_eye
78
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