1 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune
4 Contact: Yicong Yang <yangyicong@hisilicon.com>
5 Description: This directory contains files for tuning the PCIe link
6 parameters(events). Each file is named after the event
9 See Documentation/trace/hisi-ptt.rst for more information.
11 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_cpl
14 Contact: Yicong Yang <yangyicong@hisilicon.com>
15 Description: (RW) Controls the weight of Tx completion TLPs, which influence
16 the proportion of outbound completion TLPs on the PCIe link.
17 The available tune data is [0, 1, 2]. Writing a negative value
18 will return an error, and out of range values will be converted
19 to 2. The value indicates a probable level of the event.
21 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_np
24 Contact: Yicong Yang <yangyicong@hisilicon.com>
25 Description: (RW) Controls the weight of Tx non-posted TLPs, which influence
26 the proportion of outbound non-posted TLPs on the PCIe link.
27 The available tune data is [0, 1, 2]. Writing a negative value
28 will return an error, and out of range values will be converted
29 to 2. The value indicates a probable level of the event.
31 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_p
34 Contact: Yicong Yang <yangyicong@hisilicon.com>
35 Description: (RW) Controls the weight of Tx posted TLPs, which influence the
36 proportion of outbound posted TLPs on the PCIe link.
37 The available tune data is [0, 1, 2]. Writing a negative value
38 will return an error, and out of range values will be converted
39 to 2. The value indicates a probable level of the event.
41 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/rx_alloc_buf_level
44 Contact: Yicong Yang <yangyicong@hisilicon.com>
45 Description: (RW) Control the allocated buffer watermark for inbound packets.
46 The packets will be stored in the buffer first and then transmitted
47 either when the watermark reached or when timed out.
48 The available tune data is [0, 1, 2]. Writing a negative value
49 will return an error, and out of range values will be converted
50 to 2. The value indicates a probable level of the event.
52 What: /sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/tx_alloc_buf_level
55 Contact: Yicong Yang <yangyicong@hisilicon.com>
56 Description: (RW) Control the allocated buffer watermark of outbound packets.
57 The packets will be stored in the buffer first and then transmitted
58 either when the watermark reached or when timed out.
59 The available tune data is [0, 1, 2]. Writing a negative value
60 will return an error, and out of range values will be converted
61 to 2. The value indicates a probable level of the event.