shmtop: .

- order by top users first
- print values in GB, not 512b blocks

shmtop

-#!/usr/bin/python
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (C) 2017-2019  Nexedi SA and Contributors.
+#                          Julien Muchembled <jm@nexedi.com>
+#                          Kirill Smelkov <kirr@nexedi.com>
+#
+# This program is free software: you can Use, Study, Modify and Redistribute
+# it under the terms of the GNU General Public License version 3, or (at your
+# option) any later version, as published by the Free Software Foundation.
+#
+# You can also Link and Combine this program with other software covered by
+# the terms of any of the Free Software licenses or any of the Open Source
+# Initiative approved licenses and Convey the resulting work. Corresponding
+# source of such a combination shall include the source code for all other
+# software used.
+#
+# This program is distributed WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# See COPYING file for full licensing terms.
+# See https://www.nexedi.com/licensing for rationale and options.
+"""shmtop - show top-like RAM usaege of a tmpfs instance
+
+   even hidden files are accounted.
+   XXX text
+"""
+
+mntpt = '/dev/shm'
+
 import errno, os, pwd
 os.chdir('/proc')
 z = []
@@ -12,7 +40,7 @@ for p in os.listdir('.'):
   try:
     for y in os.listdir(x):
       y = x + '/' + y
-      if os.readlink(y).startswith('/dev/shm/'):
+      if os.readlink(y).startswith(mntpt + '/'):
         y = os.open(y, 0)
         try:
           n += os.fstat(y).st_blocks
@@ -30,7 +58,17 @@ for p in os.listdir('.'):
         raise
       continue
     uid = map(int, x['Uid'].split())
-    z.append((pwd.getpwuid(uid[0]).pw_name, x['Name'].strip(), pid, n))
-z.sort(key=lambda x: x[3])
-from pprint import pprint as pp
-pp(z)
+    z.append((pwd.getpwuid(uid[0]).pw_name, x['Name'].strip(), pid, n*512))
+z.sort(key=lambda x: x[3], reverse=True)
+#from pprint import pprint as pp
+#pp(z)
+
+GB = 1024.*1024*1024
+
+print("# %s" % mntpt)
+rss_total = 0.
+for user, name, pid, rss in z:
+    print '%s (%d,%s)\t%7.1fGB' % (name, pid, user, rss / GB)
+    rss_total += rss
+
+print("( total:\t%.1fGB )" % (rss_total / GB))