62 lines · plain
1What: /sys/devices/uncore_iio_x/dieX2Date: February 20203Contact: Alexander Antonov <alexander.antonov@linux.intel.com>4Description:5 Each IIO stack (PCIe root port) has its own IIO PMON block, so6 each dieX file (where X is die number) holds "Segment:Root Bus"7 for PCIe root port, which can be monitored by that IIO PMON8 block.9 For example, on 4-die Xeon platform with up to 6 IIO stacks per10 die and, therefore, 6 IIO PMON blocks per die, the mapping of11 IIO PMON block 0 exposes as the following::12 13 $ ls /sys/devices/uncore_iio_0/die*14 -r--r--r-- /sys/devices/uncore_iio_0/die015 -r--r--r-- /sys/devices/uncore_iio_0/die116 -r--r--r-- /sys/devices/uncore_iio_0/die217 -r--r--r-- /sys/devices/uncore_iio_0/die318 19 $ tail /sys/devices/uncore_iio_0/die*20 ==> /sys/devices/uncore_iio_0/die0 <==21 0000:0022 ==> /sys/devices/uncore_iio_0/die1 <==23 0000:4024 ==> /sys/devices/uncore_iio_0/die2 <==25 0000:8026 ==> /sys/devices/uncore_iio_0/die3 <==27 0000:c028 29 Which means::30 31 IIO PMU 0 on die 0 belongs to PCI RP on bus 0x00, domain 0x000032 IIO PMU 0 on die 1 belongs to PCI RP on bus 0x40, domain 0x000033 IIO PMU 0 on die 2 belongs to PCI RP on bus 0x80, domain 0x000034 IIO PMU 0 on die 3 belongs to PCI RP on bus 0xc0, domain 0x000035 36What: /sys/devices/uncore_upi_x/dieX37Date: March 202238Contact: Alexander Antonov <alexander.antonov@linux.intel.com>39Description:40 Each /sys/devices/uncore_upi_X/dieY file holds "upi_Z,die_W"41 value that means UPI link number X on die Y is connected to UPI42 link Z on die W and this link between sockets can be monitored43 by UPI PMON block.44 For example, 4-die Sapphire Rapids platform has the following45 UPI 0 topology::46 47 # tail /sys/devices/uncore_upi_0/die*48 ==> /sys/devices/uncore_upi_0/die0 <==49 upi_1,die_150 ==> /sys/devices/uncore_upi_0/die1 <==51 upi_0,die_352 ==> /sys/devices/uncore_upi_0/die2 <==53 upi_1,die_354 ==> /sys/devices/uncore_upi_0/die3 <==55 upi_0,die_156 57 Which means::58 59 UPI link 0 on die 0 is connected to UPI link 1 on die 160 UPI link 0 on die 1 is connected to UPI link 0 on die 361 UPI link 0 on die 2 is connected to UPI link 1 on die 362 UPI link 0 on die 3 is connected to UPI link 0 on die 1