1 What: /sys/devices/uncore_iio_x/dieX
2 Date: February 2020
3 Contact: Alexander Antonov <alexander.an
4 Description:
5 Each IIO stack (PCIe root port
6 each dieX file (where X is die
7 for PCIe root port, which can
8 block.
9 For example, on 4-die Xeon pla
10 die and, therefore, 6 IIO PMON
11 IIO PMON block 0 exposes as th
12
13 $ ls /sys/devices/uncore_i
14 -r--r--r-- /sys/devices/un
15 -r--r--r-- /sys/devices/un
16 -r--r--r-- /sys/devices/un
17 -r--r--r-- /sys/devices/un
18
19 $ tail /sys/devices/uncore
20 ==> /sys/devices/uncore_ii
21 0000:00
22 ==> /sys/devices/uncore_ii
23 0000:40
24 ==> /sys/devices/uncore_ii
25 0000:80
26 ==> /sys/devices/uncore_ii
27 0000:c0
28
29 Which means::
30
31 IIO PMU 0 on die 0 belongs
32 IIO PMU 0 on die 1 belongs
33 IIO PMU 0 on die 2 belongs
34 IIO PMU 0 on die 3 belongs
35
36 What: /sys/devices/uncore_upi_x/dieX
37 Date: March 2022
38 Contact: Alexander Antonov <alexander.an
39 Description:
40 Each /sys/devices/uncore_upi_X
41 value that means UPI link numb
42 link Z on die W and this link
43 by UPI PMON block.
44 For example, 4-die Sapphire Ra
45 UPI 0 topology::
46
47 # tail /sys/devices/uncore
48 ==> /sys/devices/uncore_up
49 upi_1,die_1
50 ==> /sys/devices/uncore_up
51 upi_0,die_3
52 ==> /sys/devices/uncore_up
53 upi_1,die_3
54 ==> /sys/devices/uncore_up
55 upi_0,die_1
56
57 Which means::
58
59 UPI link 0 on die 0 is con
60 UPI link 0 on die 1 is con
61 UPI link 0 on die 2 is con
62 UPI link 0 on die 3 is con
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