Use absolute_import from the __future__ everywhere

[bup.git] / cmd / memtest-cmd.py

diff --git a/cmd/memtest-cmd.py b/cmd/memtest-cmd.py
index f1ab06b186786d24c45df916cb050a2d9af8d531..894bb64366a20543cc50d2bcce3874871ca3eec3 100755 (executable)
--- a/cmd/memtest-cmd.py
+++ b/cmd/memtest-cmd.py
@@ -1,33 +1,70 @@
-#!/usr/bin/env python
-import sys, re, struct, mmap, time
-from bup import git, options
-from bup.helpers import *
+#!/bin/sh
+"""": # -*-python-*-
+bup_python="$(dirname "$0")/bup-python" || exit $?
+exec "$bup_python" "$0" ${1+"$@"}
+"""
+# end of bup preamble
+
+from __future__ import absolute_import
+import sys, re, struct, time, resource
+
+from bup import git, bloom, midx, options, _helpers
+from bup.helpers import handle_ctrl_c
+
 
 handle_ctrl_c()
 
-def s_from_bytes(bytes):
-    clist = [chr(b) for b in bytes]
-    return ''.join(clist)
+
+_linux_warned = 0
+def linux_memstat():
+    global _linux_warned
+    #fields = ['VmSize', 'VmRSS', 'VmData', 'VmStk', 'ms']
+    d = {}
+    try:
+        f = open('/proc/self/status')
+    except IOError as e:
+        if not _linux_warned:
+            log('Warning: %s\n' % e)
+            _linux_warned = 1
+        return {}
+    for line in f:
+        # Note that on Solaris, this file exists but is binary.  If that
+        # happens, this split() might not return two elements.  We don't
+        # really need to care about the binary format since this output
+        # isn't used for much and report() can deal with missing entries.
+        t = re.split(r':\s*', line.strip(), 1)
+        if len(t) == 2:
+            k,v = t
+            d[k] = v
+    return d
 
 
-last = start = 0
+last = last_u = last_s = start = 0
 def report(count):
-    global last, start
-    fields = ['VmSize', 'VmRSS', 'VmData', 'VmStk', 'ms']
-    d = {}
-    for line in open('/proc/self/status').readlines():
-        l = re.split(r':\s*', line.strip(), 1)
-        d[l[0]] = l[1]
+    global last, last_u, last_s, start
+    headers = ['RSS', 'MajFlt', 'user', 'sys', 'ms']
+    ru = resource.getrusage(resource.RUSAGE_SELF)
     now = time.time()
-    d['ms'] = int((now - last) * 1000)
+    rss = int(ru.ru_maxrss/1024)
+    if not rss:
+        rss = linux_memstat().get('VmRSS', '??')
+    fields = [rss,
+              ru.ru_majflt,
+              int((ru.ru_utime - last_u) * 1000),
+              int((ru.ru_stime - last_s) * 1000),
+              int((now - last) * 1000)]
+    fmt = '%9s  ' + ('%10s ' * len(fields))
     if count >= 0:
-        e1 = count
-        fields = [d[k] for k in fields]
+        print fmt % tuple([count] + fields)
     else:
-        e1 = ''
         start = now
-    print ('%9s  ' + ('%10s ' * len(fields))) % tuple([e1] + fields)
+        print fmt % tuple([''] + headers)
     sys.stdout.flush()
+    
+    # don't include time to run report() in usage counts
+    ru = resource.getrusage(resource.RUSAGE_SELF)
+    last_u = ru.ru_utime
+    last_s = ru.ru_stime
     last = time.time()
 
 
@@ -39,7 +76,7 @@ c,cycles=  number of cycles to run [100]
 ignore-midx  ignore .midx files, use only .idx files
 existing   test with existing objects instead of fake ones
 """
-o = options.Options('bup memtest', optspec)
+o = options.Options(optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
 
 if extra:
@@ -51,8 +88,7 @@ git.check_repo_or_die()
 m = git.PackIdxList(git.repo('objects/pack'))
 
 report(-1)
-f = open('/dev/urandom')
-a = mmap.mmap(-1, 20)
+_helpers.random_sha()
 report(0)
 
 if opt.existing:
@@ -65,13 +101,10 @@ if opt.existing:
 for c in xrange(opt.cycles):
     for n in xrange(opt.number):
         if opt.existing:
-            bin = objit.next()
+            bin = next(objit)
             assert(m.exists(bin))
         else:
-            b = f.read(3)
-            a[0:2] = b[0:2]
-            a[2] = chr(ord(b[2]) & 0xf0)
-            bin = str(a[0:20])
+            bin = _helpers.random_sha()
 
             # technically, a randomly generated object id might exist.
             # but the likelihood of that is the likelihood of finding
@@ -80,7 +113,16 @@ for c in xrange(opt.cycles):
             assert(not m.exists(bin))
     report((c+1)*opt.number)
 
-print ('%d objects searched in %d steps: avg %.3f steps/object' 
-       % (git._total_searches, git._total_steps,
-          git._total_steps*1.0/git._total_searches))
+if bloom._total_searches:
+    print ('bloom: %d objects searched in %d steps: avg %.3f steps/object' 
+           % (bloom._total_searches, bloom._total_steps,
+              bloom._total_steps*1.0/bloom._total_searches))
+if midx._total_searches:
+    print ('midx: %d objects searched in %d steps: avg %.3f steps/object' 
+           % (midx._total_searches, midx._total_steps,
+              midx._total_steps*1.0/midx._total_searches))
+if git._total_searches:
+    print ('idx: %d objects searched in %d steps: avg %.3f steps/object' 
+           % (git._total_searches, git._total_steps,
+              git._total_steps*1.0/git._total_searches))
 print 'Total time: %.3fs' % (time.time() - start)