Geoffrey McRae 6631fde35f [client] clipboard: reduce remote file transfer latency
Mark the last non-empty FILE_DATA payload with BEGIN and END when the
producer knows it is terminal. Complete producer bookkeeping in the
following fileDataEnd call without consuming another LGMP grant. Keep
the standalone terminal record for empty and legacy unknown streams.

Drain up to 64 queued clipboard records per worker pass instead of
sleeping after every message. Poll at 1 ms while transfers, blocked
writes, held input, or pending output are active, and retain the 10 ms
interval while idle.

This removes a serialized grant round trip from every non-empty file
response and reduces scheduling delay while a large transfer is active.
Keep the 1 MiB payload size because the bottleneck was stop-and-wait
latency, not the chunk capacity.

Exercise a full 1 MiB response in a single BEGIN|END grant and retain
coverage for empty unknown-size responses.
2026-08-15 01:13:13 +10:00
2017-12-14 22:22:44 +11:00
2026-05-31 15:13:57 +10:00
2018-05-31 13:28:36 +10:00
2017-10-31 19:07:16 +11:00

Looking Glass

Looking Glass lets you use a Windows virtual machine from Linux with very low display and input latency. The current recommended setup uses the Looking Glass Indirect Display Driver (IDD) in the Windows guest and the Looking Glass Client on the Linux host.

Start here

The Linux client is currently distributed as source code and must be built before it can be installed. The end-user guide covers the complete process:

  1. Build the Linux client.
  2. Configure shared memory for the virtual machine.
  3. Install the Looking Glass IDD in Windows.
  4. Install and run the client.

See the Looking Glass documentation for the current requirements and setup guide.

Source archives

IMPORTANT

This project contains submodules that must be checked out if building from the git repository! If you are not a developer and just want to compile Looking Glass, please download the source archive from the website instead:

https://looking-glass.io/downloads

Source code for the documentation can be found in the doc directory.

You may view this locally as HTML by running make html with python3-sphinx and python3-sphinx-rtd-theme installed.

Description
An extremely low latency KVMFR (KVM FrameRelay) implementation for guests with VGA PCI Passthrough.
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