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[None][feat] Enable FA4 + parallel VAE in LTX-2 examples #17610

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[None][feat] Enable FA4 + parallel VAE in LTX-2 examples #17610

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[None][feat] Enable FA4 + parallel VAE in LTX-2 examples
luyiyun1021 Aug 13, 2026
31ef855
[None][feat] Add default LTX-2 1-GPU config and two-stage CLI flags
luyiyun1021 Aug 13, 2026
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2 changes: 1 addition & 1 deletion examples/visual_gen/README.md
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Expand Up @@ -29,7 +29,7 @@ python models/qwen_image_edit.py --image /path/to/source.png --prompt "Make the
# With engine config (quant, parallelism, etc.)
python models/wan_t2v.py --visual_gen_args configs/wan2.2-t2v-fp4-1gpu.yaml
python models/wan_i2v.py --visual_gen_args configs/wan2.2-i2v-fp4-1gpu.yaml --image /path/to/image.png
python models/ltx2.py --visual_gen_args configs/ltx2-t2v-fp8-1-gpu.yaml
python models/ltx2.py --visual_gen_args configs/ltx2-t2v-fp8-1gpu.yaml
python models/flux1.py --visual_gen_args configs/flux1-dev-fp4-1gpu.yaml
python models/flux2.py --visual_gen_args configs/flux2-dev-fp4-1gpu.yaml
python models/cosmos3_ti2v.py --visual_gen_args configs/cosmos3-nano-1gpu.yaml --prompt "A robot arm picks fruit in a grocery store"
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3 changes: 2 additions & 1 deletion examples/visual_gen/configs/ltx2-4gpu.yaml
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Expand Up @@ -17,11 +17,12 @@
# whatever checkpoint is passed via --model_path). Shared by offline
# examples (--visual_gen_args) and trtllm-serve.
attention_config:
backend: VANILLA
backend: FA4
parallel_config:
cfg_size: 2
ulysses_size: 2
async_ulysses: true
parallel_vae_size: 4
torch_compile_config:
enable: true
cuda_graph_config:
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2 changes: 1 addition & 1 deletion examples/visual_gen/configs/ltx2-t2v-fp4-1gpu.yaml
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Expand Up @@ -19,7 +19,7 @@ quant_config:
quant_algo: NVFP4
dynamic: true
attention_config:
backend: VANILLA
backend: FA4
parallel_config:
cfg_size: 1
ulysses_size: 1
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2 changes: 1 addition & 1 deletion examples/visual_gen/configs/ltx2-t2v-fp8-1gpu.yaml
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Expand Up @@ -19,7 +19,7 @@ quant_config:
quant_algo: FP8_BLOCK_SCALES
dynamic: true
attention_config:
backend: VANILLA
backend: FA4
parallel_config:
cfg_size: 1
ulysses_size: 1
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2 changes: 1 addition & 1 deletion examples/visual_gen/models/ltx2.py
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Expand Up @@ -17,7 +17,7 @@

Usage:
python ltx2.py
python ltx2.py --visual_gen_args ../configs/ltx2.yaml
python ltx2.py --visual_gen_args ../configs/ltx2-t2v-fp8-1gpu.yaml
"""

import argparse
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