8000 Use tracemalloc for memory measurements. by pp-mo · Pull Request #5948 · SciTools/iris · GitHub
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Use tracemalloc for memory measurements. #5948

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Merged
merged 3 commits into from
May 16, 2024
Merged

Use tracemalloc for memory measurements. #5948

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074d3a1
Use tracemalloc for memory measurements.
pp-mo May 9, 2024
d9232df
Review changes.
pp-mo May 15, 2024
08477e5
Merge branch 'main' into tracemalloc_benchmarks
stephenworsley May 16, 2024
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27 changes: 18 additions & 9 deletions benchmarks/benchmarks/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,9 @@
"""Common code for benchmarks."""

from os import environ
import resource
import tracemalloc

import numpy as np


def disable_repeat_between_setup(benchmark_object):
Expand Down Expand Up @@ -61,27 +63,34 @@ class TrackAddedMemoryAllocation:
AVD's detection threshold and be treated as 'signal'. Results
smaller than this value will therefore be returned as equal to this
value, ensuring fractionally small noise / no noise at all.
Defaults to 1.0

"""
RESULT_ROUND_DP : int
Number of decimal places of rounding on result values (in Mb).
Defaults to 1

RESULT_MINIMUM_MB = 5.0
"""

@staticmethod
def process_resident_memory_mb():
return resource.getrusage(resource.RUSAGE_SELF).ru_maxrss / 1024.0
RESULT_MINIMUM_MB = 1.0
RESULT_ROUND_DP = 1

def __enter__(self):
self.mb_before = self.process_resident_memory_mb()
tracemalloc.start()
return self

def __exit__(self, *_):
self.mb_after = self.process_resident_memory_mb()
_, peak_mem_bytes = tracemalloc.get_traced_memory()
tracemalloc.stop()
# Save peak-memory allocation, scaled from bytes to Mb.
self._peak_mb = peak_mem_bytes * (2.0**-20)

def addedmem_mb(self):
"""Return measured memory growth, in Mb."""
result = self.mb_after - self.mb_before
result = self._peak_mb
# Small results are too vulnerable to noise being interpreted as signal.
result = max(self.RESULT_MINIMUM_MB, result)
# Rounding makes results easier to read.
result = np.round(result, self.RESULT_ROUND_DP)
return result

@staticmethod
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