Documentation/ABI/testing/sysfs-bus-event_source-devices-hisi_ptt

Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/sysfs-bus-event_source-devices-hisi_ptt

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/testing/sysfs-bus-event_source-devices-hisi_ptt
Extension
[no extension]
Size
5239 bytes
Lines
114
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: Documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

What:		/sys/bus/event_source/devices/hisi_ptt<sicl_id>_<core_id>/tune
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/tune/qos_tx_cpl
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/tune/qos_tx_np
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/tune/qos_tx_p
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/tune/rx_alloc_buf_level
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/tune/tx_alloc_buf_level
Date:		October 2022
KernelVersion:	6.1
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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<sicl_id>_<core_id>/root_port_filters
Date:		May 2023
KernelVersion:	6.5
Contact:	Yicong Yang <yangyicong@hisilicon.com>
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 <domain>:<bus>:<device>.<function>.

Annotation

Implementation Notes