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Increasing pipe buffer size for non win32 machines #144

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Merged
zanjonke merged 1 commit into from
Mar 31, 2026
Merged

Increasing pipe buffer size for non win32 machines #144

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7 changes: 7 additions & 0 deletions render_machine/render_utils.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import fcntl
import os
import signal
import subprocess
Expand All @@ -18,6 +19,8 @@
POLL_INTERVAL_SECONDS = 0.2
SIGTERM_GRACE_PERIOD_SECONDS = 0.2
STDOUT_READ_TIMEOUT_SECONDS = 5
F_SETPIPE_SIZE = 1031 # Linux-only constant
PIPE_SIZE_KB = 1024 # 1MB


def revert_changes_for_frid(render_context):
Expand Down Expand Up @@ -101,6 +104,10 @@ def execute_script( # noqa: C901
start_new_session=(sys.platform != "win32"),
)

if sys.platform == "linux":
# Set the pipe size to 1MB to avoid buffer overflows
fcntl.fcntl(proc.stdout.fileno(), F_SETPIPE_SIZE, PIPE_SIZE_KB * 1024) # 1MB

try:
while proc.poll() is None:
if time.time() - start_time >= script_timeout:
Expand Down
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