mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 14:23:49 +01:00
Alexander Pantyukhin
d526643f15
Remove redundant import of the sys module. Also use the sort function instead of sorted. It sorts the direct array without create the new one in memory. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Alexander Pantyukhin <[email protected]> Cc: Roman Gushchin <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
71 lines
1.8 KiB
Python
71 lines
1.8 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (C) 2022 Roman Gushchin <[email protected]>
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# Copyright (C) 2022 Meta
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import os
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import argparse
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def scan_cgroups(cgroup_root):
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cgroups = {}
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for root, subdirs, _ in os.walk(cgroup_root):
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for cgroup in subdirs:
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path = os.path.join(root, cgroup)
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ino = os.stat(path).st_ino
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cgroups[ino] = path
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# (memcg ino, path)
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return cgroups
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def scan_shrinkers(shrinker_debugfs):
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shrinkers = []
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for root, subdirs, _ in os.walk(shrinker_debugfs):
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for shrinker in subdirs:
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count_path = os.path.join(root, shrinker, "count")
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with open(count_path) as f:
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for line in f.readlines():
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items = line.split(' ')
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ino = int(items[0])
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# (count, shrinker, memcg ino)
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shrinkers.append((int(items[1]), shrinker, ino))
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return shrinkers
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def main():
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parser = argparse.ArgumentParser(description='Display biggest shrinkers')
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parser.add_argument('-n', '--lines', type=int, help='Number of lines to print')
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args = parser.parse_args()
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cgroups = scan_cgroups("/sys/fs/cgroup/")
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shrinkers = scan_shrinkers("/sys/kernel/debug/shrinker/")
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shrinkers.sort(reverse = True, key = lambda x: x[0])
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n = 0
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for s in shrinkers:
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count, name, ino = (s[0], s[1], s[2])
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if count == 0:
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break
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if ino == 0 or ino == 1:
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cg = "/"
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else:
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try:
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cg = cgroups[ino]
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except KeyError:
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cg = "unknown (%d)" % ino
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print("%-8s %-20s %s" % (count, name, cg))
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n += 1
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if args.lines and n >= args.lines:
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break
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if __name__ == '__main__':
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main()
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