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Make sure to read all data from stdout and stderr #290

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Merged
smarr merged 4 commits into from
Jul 7, 2025
Merged

Make sure to read all data from stdout and stderr #290

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61d99cc
Read from channels until they are closed
smarr Jun 27, 2025
96d516b
Detect End Of File on stdout and stderr while reading
smarr Jun 27, 2025
213e33d
Need to call wait() to make sure we get the return code
smarr Jun 27, 2025
0951a2e
Use empty string to display a missing unit
smarr Jun 28, 2025
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2 changes: 2 additions & 0 deletions rebench/executor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -108,6 +108,8 @@ def _indicate_progress(self, completed_task, run):

art_mean = run.get_mean_of_totals()
art_unit = run.total_unit
if art_unit is None:
art_unit = ""

hour, minute, sec = self._estimate_time_left()

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36 changes: 26 additions & 10 deletions rebench/subprocess_with_timeout.py
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Expand Up @@ -91,24 +91,40 @@ def process_output(self, proc):
self.stdout_result = ""
self.stderr_result = ""

stdout_eof = False
stderr_eof = False

while True:
reads = [proc.stdout.fileno()]
if self._stderr == PIPE:
reads = []

if proc.stdout and not proc.stdout.closed and not stdout_eof:
reads.append(proc.stdout.fileno())
if (self._stderr == PIPE and
proc.stderr and
not proc.stderr.closed and
not stderr_eof):
reads.append(proc.stderr.fileno())
ret = select(reads, [], [])

if not reads:
proc.wait()
break

ret = select(reads, [], [], 0.1)
for file_no in ret[0]:
if file_no == proc.stdout.fileno():
read = output_as_str(proc.stdout.readline())
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Copilot AI Jun 27, 2025

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Consider refactoring the duplicated logic for handling stdout and stderr reads into a helper function to improve maintainability and reduce code repetition.

Copilot uses AI. Check for mistakes.
sys.stdout.write(read)
self.stdout_result += read
if read == "":
stdout_eof = True
else:
sys.stdout.write(read)
self.stdout_result += read
if self._stderr == PIPE and file_no == proc.stderr.fileno():
read = output_as_str(proc.stderr.readline())
sys.stderr.write(read)
self.stderr_result += read

if proc.poll() is not None:
break
if read == "":
stderr_eof = True
else:
sys.stderr.write(read)
self.stderr_result += read
else:
stdout_r, stderr_r = proc.communicate()
self.stdout_result = output_as_str(stdout_r)
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