What: /sys/bus/event_source/devices/hisi_ptt_/tune Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: This directory contains files for tuning the PCIe link parameters(events). Each file is named after the event of the PCIe link. See Documentation/trace/hisi-ptt.rst for more information. What: /sys/bus/event_source/devices/hisi_ptt_/tune/qos_tx_cpl Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: (RW) Controls the weight of Tx completion TLPs, which influence the proportion of outbound completion TLPs on the PCIe link. The available tune data is [0, 1, 2]. Writing a negative value will return an error, and out of range values will be converted to 2. The value indicates a probable level of the event. What: /sys/bus/event_source/devices/hisi_ptt_/tune/qos_tx_np Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: (RW) Controls the weight of Tx non-posted TLPs, which influence the proportion of outbound non-posted TLPs on the PCIe link. The available tune data is [0, 1, 2]. Writing a negative value will return an error, and out of range values will be converted to 2. The value indicates a probable level of the event. What: /sys/bus/event_source/devices/hisi_ptt_/tune/qos_tx_p Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: (RW) Controls the weight of Tx posted TLPs, which influence the proportion of outbound posted TLPs on the PCIe link. The available tune data is [0, 1, 2]. Writing a negative value will return an error, and out of range values will be converted to 2. The value indicates a probable level of the event. What: /sys/bus/event_source/devices/hisi_ptt_/tune/rx_alloc_buf_level Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: (RW) Control the allocated buffer watermark for inbound packets. The packets will be stored in the buffer first and then transmitted either when the watermark reached or when timed out. The available tune data is [0, 1, 2]. Writing a negative value will return an error, and out of range values will be converted to 2. The value indicates a probable level of the event. What: /sys/bus/event_source/devices/hisi_ptt_/tune/tx_alloc_buf_level Date: October 2022 KernelVersion: 6.1 Contact: Yicong Yang Description: (RW) Control the allocated buffer watermark of outbound packets. The packets will be stored in the buffer first and then transmitted either when the watermark reached or when timed out. The available tune data is [0, 1, 2]. Writing a negative value will return an error, and out of range values will be converted to 2. The value indicates a probable level of the event. What: /sys/devices/hisi_ptt_/root_port_filters Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: This directory contains the files providing the PCIe Root Port filters information used for PTT trace. Each file is named after the supported Root Port device name ::.. See the description of the "filter" in Documentation/trace/hisi-ptt.rst for more information. What: /sys/devices/hisi_ptt_/root_port_filters/multiselect Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: (Read) Indicates if this kind of filter can be selected at the same time as others filters, or must be used on it's own. 1 indicates the former case and 0 indicates the latter. What: /sys/devices/hisi_ptt_/root_port_filters/ Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: (Read) Indicates the filter value of this Root Port filter, which can be used to control the TLP headers to trace by the PTT trace. What: /sys/devices/hisi_ptt_/requester_filters Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: This directory contains the files providing the PCIe Requester filters information used for PTT trace. Each file is named after the supported Endpoint device name ::.. See the description of the "filter" in Documentation/trace/hisi-ptt.rst for more information. What: /sys/devices/hisi_ptt_/requester_filters/multiselect Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: (Read) Indicates if this kind of filter can be selected at the same time as others filters, or must be used on it's own. 1 indicates the former case and 0 indicates the latter. What: /sys/devices/hisi_ptt_/requester_filters/ Date: May 2023 KernelVersion: 6.5 Contact: Yicong Yang Description: (Read) Indicates the filter value of this Requester filter, which can be used to control the TLP headers to trace by the PTT trace.