1 What: /sys/devices/uncore_iio_x/dieX 1 What: /sys/devices/uncore_iio_x/dieX
2 Date: February 2020 2 Date: February 2020
3 Contact: Alexander Antonov <alexander.an !! 3 Contact: Roman Sudarikov <roman.sudarikov@linux.intel.com>
4 Description: 4 Description:
5 Each IIO stack (PCIe root port 5 Each IIO stack (PCIe root port) has its own IIO PMON block, so
6 each dieX file (where X is die 6 each dieX file (where X is die number) holds "Segment:Root Bus"
7 for PCIe root port, which can 7 for PCIe root port, which can be monitored by that IIO PMON
8 block. 8 block.
9 For example, on 4-die Xeon pla 9 For example, on 4-die Xeon platform with up to 6 IIO stacks per
10 die and, therefore, 6 IIO PMON 10 die and, therefore, 6 IIO PMON blocks per die, the mapping of
11 IIO PMON block 0 exposes as th 11 IIO PMON block 0 exposes as the following::
12 12
13 $ ls /sys/devices/uncore_i 13 $ ls /sys/devices/uncore_iio_0/die*
14 -r--r--r-- /sys/devices/un 14 -r--r--r-- /sys/devices/uncore_iio_0/die0
15 -r--r--r-- /sys/devices/un 15 -r--r--r-- /sys/devices/uncore_iio_0/die1
16 -r--r--r-- /sys/devices/un 16 -r--r--r-- /sys/devices/uncore_iio_0/die2
17 -r--r--r-- /sys/devices/un 17 -r--r--r-- /sys/devices/uncore_iio_0/die3
18 18
19 $ tail /sys/devices/uncore 19 $ tail /sys/devices/uncore_iio_0/die*
20 ==> /sys/devices/uncore_ii 20 ==> /sys/devices/uncore_iio_0/die0 <==
21 0000:00 21 0000:00
22 ==> /sys/devices/uncore_ii 22 ==> /sys/devices/uncore_iio_0/die1 <==
23 0000:40 23 0000:40
24 ==> /sys/devices/uncore_ii 24 ==> /sys/devices/uncore_iio_0/die2 <==
25 0000:80 25 0000:80
26 ==> /sys/devices/uncore_ii 26 ==> /sys/devices/uncore_iio_0/die3 <==
27 0000:c0 27 0000:c0
28 28
29 Which means:: 29 Which means::
30 30
31 IIO PMU 0 on die 0 belongs 31 IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x0000
32 IIO PMU 0 on die 1 belongs 32 IIO PMU 0 on die 1 belongs to PCI RP on bus 0x40, domain 0x0000
33 IIO PMU 0 on die 2 belongs 33 IIO PMU 0 on die 2 belongs to PCI RP on bus 0x80, domain 0x0000
34 IIO PMU 0 on die 3 belongs 34 IIO PMU 0 on die 3 belongs to PCI RP on bus 0xc0, domain 0x0000
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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