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[Bugfix] fix qwen image oom #1168

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Merged
hsliuustc0106 merged 3 commits into from
Feb 3, 2026
+5 −13
Merged

[Bugfix] fix qwen image oom #1168

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be84b29
init
ZJY0516 Feb 3, 2026
a64d453
Merge branch 'main' into oom-fix
ZJY0516 Feb 3, 2026
8f6eb10
update
ZJY0516 Feb 3, 2026
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18 changes: 5 additions & 13 deletions vllm_omni/diffusion/models/qwen_image/qwen_image_transformer.py
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project

import functools
from collections.abc import Iterable
from functools import lru_cache
from math import prod
from typing import Any

Expand Down Expand Up @@ -249,7 +249,7 @@ def forward(self, video_fhw, txt_seq_lens, device):

return vid_freqs, txt_freqs

@functools.cache
@lru_cache(maxsize=16)
def _compute_video_freqs(self, frame, height, width, idx=0):
seq_lens = frame * height * width
freqs_pos = self.pos_freqs.split([x // 2 for x in self.axes_dim], dim=1)
Expand All @@ -268,7 +268,7 @@ def _compute_video_freqs(self, frame, height, width, idx=0):
freqs = torch.cat([freqs_frame, freqs_height, freqs_width], dim=-1).reshape(seq_lens, -1)
return freqs.clone().contiguous()

@functools.cache
@lru_cache(maxsize=16)
def _compute_condition_freqs(self, frame, height, width):
seq_lens = frame * height * width
freqs_pos = self.pos_freqs.split([x // 2 for x in self.axes_dim], dim=1)
Expand Down Expand Up @@ -311,7 +311,6 @@ def __init__(self, theta: int, axes_dim: list[int], scale_rope=False):
],
dim=1,
)
self.rope_cache = {}

# DO NOT USING REGISTER BUFFER HERE, IT WILL CAUSE COMPLEX NUMBERS LOSE ITS IMAGINARY PART
self.scale_rope = scale_rope
Expand Down Expand Up @@ -349,14 +348,7 @@ def forward(self, video_fhw, txt_seq_lens, device):
max_vid_index = 0
for idx, fhw in enumerate(video_fhw):
frame, height, width = fhw
rope_key = f"{idx}_{height}_{width}"

if not torch.compiler.is_compiling():
if rope_key not in self.rope_cache:
self.rope_cache[rope_key] = self._compute_video_freqs(frame, height, width, idx)
video_freq = self.rope_cache[rope_key]
else:
video_freq = self._compute_video_freqs(frame, height, width, idx)
video_freq = self._compute_video_freqs(frame, height, width, idx)
video_freq = video_freq.to(device)
vid_freqs.append(video_freq)

Expand All @@ -371,7 +363,7 @@ def forward(self, video_fhw, txt_seq_lens, device):

return vid_freqs, txt_freqs

@functools.cache
@lru_cache(maxsize=16)
def _compute_video_freqs(self, frame, height, width, idx=0):
seq_lens = frame * height * width
freqs_pos = self.pos_freqs.split([x // 2 for x in self.axes_dim], dim=1)
Expand Down