tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1HID Driver Description
2MLNXBFD0 mlxbf-pmc Performance counters (BlueField-1)
3MLNXBFD1 mlxbf-pmc Performance counters (BlueField-2)
4MLNXBFD2 mlxbf-pmc Performance counters (BlueField-3)
5
6What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/event_list
7Date: Dec 2020
8KernelVersion: 5.10
9Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
10Description:
11 List of events supported by the counters in the specific block.
12 It is used to extract the event number or ID associated with
13 each event.
14
15What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/event<N>
16Date: Dec 2020
17KernelVersion: 5.10
18Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
19Description:
20 Event monitored by corresponding counter. This is used to
21 program or read back the event that should be or is currently
22 being monitored by counter<N>.
23
24What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/counter<N>
25Date: Dec 2020
26KernelVersion: 5.10
27Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
28Description:
29 Counter value of the event being monitored. This is used to
30 read the counter value of the event which was programmed using
31 event<N>. This is also used to clear or reset the counter value
32 by writing 0 to the counter sysfs.
33
34What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/enable
35Date: Dec 2020
36KernelVersion: 5.10
37Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
38Description:
39 Start or stop counters. This is used to start the counters
40 for monitoring the programmed events and also to stop the
41 counters after the desired duration. Writing value 1 will
42 start all the counters in the block, and writing 0 will
43 stop all the counters together.
44
45What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/<reg>
46Date: Dec 2020
47KernelVersion: 5.10
48Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
49Description:
50 Value of register. This is used to read or reset the registers
51 where various performance statistics are counted for each block.
52 Writing 0 to the sysfs will clear the counter, writing any other
53 value is not allowed.
54
55What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/count_clock
56Date: Mar 2025
57KernelVersion: 6.14
58Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>"
59Description:
60 Use a counter for counting cycles. This is used to repurpose/dedicate
61 any of the counters in the block to counting cycles. Each counter is
62 represented by a bit (bit 0 for counter0, bit1 for counter1 and so on)
63 and setting the corresponding bit will reserve that specific counter
64 for counting cycles and override the event<N> setting.