upstream/mercurial-mirror Files · mercurial/utils/memorytop.py

copies: introduce the hg-cpython wrapper for `combine_changeset_copies`...

copies: introduce the hg-cpython wrapper for `combine_changeset_copies` This patch focus on the `hg-cpython` part of this work. Bridging the python code with the new rust code in `hg-core`. The next patch will actually plug this in the python code. The rust code use multiple Python callback, python related error within this callback are not expected unless they are a programming error or a data corruption. In addition, these callback will slowly be replaced by native Rust code. For these reasons, we use will deal with unexpected error within this callback using rust Panic and let the `rust-cpython` layer deal with raising a Python exception. The code dealing with the ChangedFile instance is repeating itself a lot. I did not factor these duplication out because that whole code will get replaced by entirely different one in a handful of changesets. Differential Revision: https://phab.mercurial-scm.org/D9298

Joerg Sonnenberger - - Load All Authors

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      # memorytop requires Python 3.4

      #

      # Usage: set PYTHONTRACEMALLOC=n in the environment of the hg invocation,

      # where n>= is the number of frames to show in the backtrace. Put calls to

      # memorytop in strategic places to show the current memory use by allocation

      # site.

      import gc

      import tracemalloc

      def memorytop(limit=10):

          gc.collect()

          snapshot = tracemalloc.take_snapshot()

          snapshot = snapshot.filter_traces(

              (

                  tracemalloc.Filter(False, "<frozen importlib._bootstrap>"),

                  tracemalloc.Filter(False, "<frozen importlib._bootstrap_external>"),

                  tracemalloc.Filter(False, "<unknown>"),

              )

          )

          stats = snapshot.statistics('traceback')

          total = sum(stat.size for stat in stats)

          print("\nTotal allocated size: %.1f KiB\n" % (total / 1024))

          print("Lines with the biggest net allocations")

          for index, stat in enumerate(stats[:limit], 1):

              print(

                  "#%d: %d objects using %.1f KiB"

                  % (index, stat.count, stat.size / 1024)

              )

              for line in stat.traceback.format(most_recent_first=True):

                  print('    ', line)

          other = stats[limit:]

          if other:

              size = sum(stat.size for stat in other)

              count = sum(stat.count for stat in other)

              print(

                  "%s other: %d objects using %.1f KiB"

                  % (len(other), count, size / 1024)

              )

          print()

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				# memorytop requires Python 3.4
				#
				# Usage: set PYTHONTRACEMALLOC=n in the environment of the hg invocation,
				# where n>= is the number of frames to show in the backtrace. Put calls to
				# memorytop in strategic places to show the current memory use by allocation
				# site.

				import gc
				import tracemalloc


				def memorytop(limit=10):
				gc.collect()
				snapshot = tracemalloc.take_snapshot()

				snapshot = snapshot.filter_traces(
				(
				tracemalloc.Filter(False, "<frozen importlib._bootstrap>"),
				tracemalloc.Filter(False, "<frozen importlib._bootstrap_external>"),
				tracemalloc.Filter(False, "<unknown>"),
				)
				)
				stats = snapshot.statistics('traceback')

				total = sum(stat.size for stat in stats)
				print("\nTotal allocated size: %.1f KiB\n" % (total / 1024))
				print("Lines with the biggest net allocations")
				for index, stat in enumerate(stats[:limit], 1):
				print(
				"#%d: %d objects using %.1f KiB"
				% (index, stat.count, stat.size / 1024)
				)
				for line in stat.traceback.format(most_recent_first=True):
				print(' ', line)

				other = stats[limit:]
				if other:
				size = sum(stat.size for stat in other)
				count = sum(stat.count for stat in other)
				print(
				"%s other: %d objects using %.1f KiB"
				% (len(other), count, size / 1024)
				)
				print()