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Signed-off-by: Yuan Tang <terrytangyuan@gmail.com>

- **Add SPDX license headers to python source files**
- **Check for SPDX headers using pre-commit**

commit 9d7ef44c3cfb72ca4c32e1c677d99259d10d4745
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:18:24 2025 -0500

    Add SPDX license headers to python source files
    
This commit adds SPDX license headers to python source files as
recommended to
the project by the Linux Foundation. These headers provide a concise way
that is
both human and machine readable for communicating license information
for each
source file. It helps avoid any ambiguity about the license of the code
and can
    also be easily used by tools to help manage license compliance.
    
The Linux Foundation runs license scans against the codebase to help
ensure
    we are in compliance with the licenses of the code we use, including
dependencies. Having these headers in place helps that tool do its job.
    
    More information can be found on the SPDX site:
    
    - https://spdx.dev/learn/handling-license-info/

Signed-off-by: Russell Bryant <rbryant@redhat.com>

commit 5a1cf1cb3b80759131c73f6a9dddebccac039dea
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:36:32 2025 -0500

    Check for SPDX headers using pre-commit
Signed-off-by: Russell Bryant <rbryant@redhat.com>

---------
Signed-off-by: Russell Bryant <rbryant@redhat.com>

**[Guided decoding performance optimization]** Sending the guided
decoding bitmask in xgrammar to the GPU
(`self.token_bitmask.to(scores.device)`) is a blocking operation that
prevents the CPU from pre-launching the sampler kernels. The CPU waits
until decode is complete, then copies the bitmask over. This PR changes
the operation to async via setting `non-blocking=True`.

(Current) The CPU is blocked on a `cudaStreamSynchronize` and only
pre-empts the sampling kernels after bitmask application. Below is the
Nsys profile for one decode phase from Llama 3.1 8B.

![image](https://github.com/user-attachments/assets/8997eae1-b822-4f52-beb8-ef19a7c6b824)

With the optimization, this is no longer the case:

![image](https://github.com/user-attachments/assets/6d5ea83f-f169-4f98-a8c1-41c719b3e1e7

)

---------
Signed-off-by: Ryan N <ryan.nguyen@centml.ai>

Signed-off-by: Jason Cheng <jasoncky96@gmail.com>

Signed-off-by: Michal Adamczyk <madamczyk@habana.ai>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: youkaichao <youkaichao@gmail.com>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: Russell Bryant <rbryant@redhat.com>

Signed-off-by: Russell Bryant <rbryant@redhat.com>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: mgoin <michael@neuralmagic.com>

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>
Signed-off-by: mgoin <michael@neuralmagic.com>
Co-authored-by: mgoin <michael@neuralmagic.com>

Signed-off-by: Vasily Alexeev <alvasian@yandex.ru>

Signed-off-by: Travis Johnson <tsjohnso@us.ibm.com>
Co-authored-by: pavlo-ruban <pavlo.ruban@servicenow.com>
Co-authored-by: Nick Hill <nickhill@us.ibm.com>

Signed-off-by: Joe Runde <Joseph.Runde@ibm.com>
Co-authored-by: Nick Hill <nickhill@us.ibm.com>

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>
Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>

Co-authored-by: constellate <constellate@1-ai-appserver-staging.codereach.com>
Co-authored-by: Kyle Mistele <kyle@constellate.ai>

Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>

Signed-off-by: Joe Runde <Joseph.Runde@ibm.com>
Co-authored-by: Joe Runde <Joseph.Runde@ibm.com>
Co-authored-by: Joe Runde <joe@joerun.de>
Co-authored-by: Nick Hill <nickhill@us.ibm.com>
Co-authored-by: Simon Mo <simon.mo@hey.com>

Co-authored-by: Simon Mo <simon.mo@hey.com>
Co-authored-by: Breno Faria <breno.faria@intrafind.com>

Co-authored-by: Ubuntu <ubuntu@ip-172-31-13-147.ec2.internal>

Co-authored-by: SangBin Cho <sangcho@sangcho-LT93GQWG9C.local>

Co-authored-by: Simon Mo <simon.mo@hey.com>