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Commit 534ab569 authored by John Zhang's avatar John Zhang
Browse files

use getrusage(RUSAGE_CHILDREN) to get a more accurate measurement of t_proc

parent ae2c3c96
......@@ -63,12 +63,19 @@ class Language:
def run_in_subproc(cls, cmd, env=None): # TODO: maybe put this in util.py
cmd = list(map(str, cmd))
logger.info(" ".join(cmd))
t0 = time.perf_counter()
import resource
ru0 = resource.getrusage(resource.RUSAGE_CHILDREN)
t0 = ru0.ru_utime + ru0.ru_stime
res = subproc.Popen(cmd, stdout=subproc.PIPE, stderr=subproc.PIPE,
so, se = res.communicate()
res = SimpleNamespace(stdout=so, stderr=se, returncode=res.returncode)
t1 = time.perf_counter()
ru1 = resource.getrusage(resource.RUSAGE_CHILDREN)
t1 = ru1.ru_utime + ru1.ru_stime
if res.returncode != 0:
raise ExecutionFailure(cmd, res)
return res, (t1 - t0)
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