1// Copyright 2019-2023 The Khronos Group Inc.
2//
3// SPDX-License-Identifier: CC-BY-4.0
4
5include::{generated}/meta/{refprefix}VK_NV_low_latency2.adoc[]
6
7=== Other Extension Metadata
8
9*Last Modified Date*::
10    2023-09-25
11*Contributors*::
12  - Charles Hansen, NVIDIA
13  - Liam Middlebrook, NVIDIA
14  - Lionel Duc, NVIDIA
15  - James Jones, NVIDIA
16  - Eric Sullivan, NVIDIA
17
18include::{generated}/interfaces/VK_NV_low_latency2.adoc[]
19
20=== Description
21
22This extension gives applications timing suggestions on when to start the
23recording of new frames to reduce the latency between input sampling and
24frame presentation.
25Applications can accomplish this through the extension by calling
26flink:vkSetLatencySleepModeNV to allow the driver to pace a given swapchain,
27then calling flink:vkLatencySleepNV before input sampling to delay the start
28of the CPU side work.
29Additional methods and structures are provided to give insight into the
30latency pipeline of an application through the latency markers.
31`apiext:VK_NV_low_latency` provides legacy support for applications that
32make use of the NVIDIA Reflex SDK whereas new implementations should use the
33`apiext:VK_NV_low_latency2` extension.
34
35=== Issues
36
371) How does Low Latency 2 work with applications that utilize device groups?
38
39Low Latency 2 does not support device groups.
40
41=== Version History
42
43  * Revision 1, 2023-09-25 (Charles Hansen)
44  ** Internal revisions
45