Readdir NFSv4 No Readdir Plus

From Linux NFS

Revision as of 19:02, 4 April 2011 (view source) Amschuma (Talk | contribs) (Created page with '<pre> 36: Linux 2.6.36 36NORC: Linux 2.6.36 (without readdir cap) 38: Linux 2.6.38 38RC: Linux 2.6.38 (with readdir cap added back) 38NB: Linux 2.6.38 (with Neil Bro…') ← Older edit		Latest revision as of 19:26, 4 April 2011 (view source) Amschuma (Talk | contribs)
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Line 1:		Line 1:
	<pre>		<pre>
-
	36: Linux 2.6.36		36: Linux 2.6.36
	36NORC: Linux 2.6.36 (without readdir cap)		36NORC: Linux 2.6.36 (without readdir cap)
Line 6:		Line 5:
	38RC: Linux 2.6.38 (with readdir cap added back)		38RC: Linux 2.6.38 (with readdir cap added back)
	38NB: Linux 2.6.38 (with Neil Brown's patch and loop detection)		38NB: Linux 2.6.38 (with Neil Brown's patch and loop detection)
		+	</pre>
		+	== 100 Files ==
-	100 Files	+	===== time ls -f --color=none /nfs/test/dir.100 > ls.txt =====
-	=========	+	<pre>
-		+
-	time ls -f --color=none /nfs/test/dir.100 > ls.txt	+
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 22:		Line 21:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |    2    |    2    |    2    |    2    |    2		readdir |    2    |    2    |    2    |    2    |    2
		+	</pre>
-	time ls -lU --color=none /nfs/test/dir.100 > ls.txt	+	===== time ls -lU --color=none /nfs/test/dir.100 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 33:		Line 34:
	lookup |  102    |  102    |  102    |  102    |  102		lookup |  102    |  102    |  102    |  102    |  102
	readdir |    2    |    2    |    2    |    2    |    2		readdir |    2    |    2    |    2    |    2    |    2
		+	</pre>
-	time ls -U --color=none /nfs/test/dir.100 > ls.txt	+	===== time ls -U --color=none /nfs/test/dir.100 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 44:		Line 47:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |    2    |    2    |    2    |    2    |    2		readdir |    2    |    2    |    2    |    2    |    2
		+	</pre>
-	time rm -rf /nfs/test/dir.100 > ls.txt	+	===== time rm -rf /nfs/test/dir.100 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 57:		Line 62:
	statfs  |    1    |    1    |    1    |    1    |    1		statfs  |    1    |    1    |    1    |    1    |    1
	readdir |    2    |    2    |    2    |    2    |    2		readdir |    2    |    2    |    2    |    2    |    2
		+	</pre>
		+	== 1,000 Files ==
-	1,000 Files	+	===== time ls -f --color=none /nfs/test/dir.1000 > ls.txt =====
-	===========	+	<pre>
-		+
-	time ls -f --color=none /nfs/test/dir.1000 > ls.txt	+
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 73:		Line 78:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |    13    |    13    |    20    |    20    |    20		readdir |    13    |    13    |    20    |    20    |    20
		+	</pre>
-	time ls -lU --color=none /nfs/test/dir.1000 > ls.txt	+	===== time ls -lU --color=none /nfs/test/dir.1000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 84:		Line 91:
	lookup |  1002  |  1002  |  1002  |  1002  |  1002		lookup |  1002  |  1002  |  1002  |  1002  |  1002
	readdir |    12    |    13    |    20    |    20    |    20		readdir |    12    |    13    |    20    |    20    |    20
		+	</pre>
-	time ls -U --color=none /nfs/test/dir.1000 > ls.txt	+	===== time ls -U --color=none /nfs/test/dir.1000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 95:		Line 104:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |    13    |    13    |    20    |    20    |    20		readdir |    13    |    13    |    20    |    20    |    20
		+	</pre>
-	time rm -rf /nfs/test/dir.1000 > ls.txt	+	===== time rm -rf /nfs/test/dir.1000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 108:		Line 119:
	statfs  |    1    |    1    |    1    |    1    |    1		statfs  |    1    |    1    |    1    |    1    |    1
	readdir |    13    |    13    |    20    |    20    |    20		readdir |    13    |    13    |    20    |    20    |    20
		+	</pre>
		+	== 10,000 Files ==
-	10,000 Files	+	===== time ls -f --color=none /nfs/test/dir.10000 > ls.txt =====
-	============	+	<pre>
-		+
-	time ls -f --color=none /nfs/test/dir.10000 > ls.txt	+
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 124:		Line 135:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |  139    |  139    |  197    |  197    |  197		readdir |  139    |  139    |  197    |  197    |  197
		+	</pre>
-	time ls -lU --color=none /nfs/test/dir.10000 > ls.txt	+	===== time ls -lU --color=none /nfs/test/dir.10000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 135:		Line 148:
	lookup |  10002  |  10002  |  10002  |  10002  |  10002		lookup |  10002  |  10002  |  10002  |  10002  |  10002
	readdir |  139    |  139    |  197    |  197    |  197		readdir |  139    |  139    |  197    |  197    |  197
		+	</pre>
-	time ls -U --color=none /nfs/test/dir.10000 > ls.txt	+	===== time ls -U --color=none /nfs/test/dir.10000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 146:		Line 161:
	lookup |    2    |    2    |    2    |    2    |    2		lookup |    2    |    2    |    2    |    2    |    2
	readdir |  139    |  139    |  197    |  197    |  197		readdir |  139    |  139    |  197    |  197    |  197
		+	</pre>
-	time rm -rf /nfs/test/dir.10000 > ls.txt	+	===== time rm -rf /nfs/test/dir.10000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC  |  38NB		kernel |    36    |  36NORC  |    38    |  38RC  |  38NB
	--------+----------+----------+----------+----------+----------		--------+----------+----------+----------+----------+----------
Line 159:		Line 176:
	statfs  |    1    |    1    |    1    |    1    |    1		statfs  |    1    |    1    |    1    |    1    |    1
	readdir |  139    |  139    |  197    |  197    |  197		readdir |  139    |  139    |  197    |  197    |  197
		+	</pre>
		+	== 100,000 Files ==
-	100,000 Files	+	===== time ls -f --color=none /nfs/test/dir.100000 > ls.txt =====
-	=============	+	<pre>
-		+
-	time ls -f --color=none /nfs/test/dir.100000 > ls.txt	+
	kernel |    36    |  36NORC  |    38    |  38RC    |  38NB		kernel |    36    |  36NORC  |    38    |  38RC    |  38NB
	--------+-----------+-----------+-----------+-----------+----------		--------+-----------+-----------+-----------+-----------+----------
Line 175:		Line 192:
	lookup |    2      |    2      |    2      |    2      |    2		lookup |    2      |    2      |    2      |    2      |    2
	readdir |  1389    |  1389    |  1961    |  1961    |  1961		readdir |  1389    |  1389    |  1961    |  1961    |  1961
		+	</pre>
-	time ls -lU --color=none /nfs/test/dir.100000 > ls.txt	+	===== time ls -lU --color=none /nfs/test/dir.100000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC    |  38NB		kernel |    36    |  36NORC  |    38    |  38RC    |  38NB
	--------+-----------+-----------+-----------+-----------+----------		--------+-----------+-----------+-----------+-----------+----------
Line 186:		Line 205:
	lookup |  100002  |  100002  |  100002  |  100002  |  100002		lookup |  100002  |  100002  |  100002  |  100002  |  100002
	readdir |    1389  |    1389  |    1961  |    1961  |    1961		readdir |    1389  |    1389  |    1961  |    1961  |    1961
		+	</pre>
-	time ls -U --color=none /nfs/test/dir.100000 > ls.txt	+	===== time ls -U --color=none /nfs/test/dir.100000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC    |  38NB		kernel |    36    |  36NORC  |    38    |  38RC    |  38NB
	--------+-----------+-----------+-----------+-----------+----------		--------+-----------+-----------+-----------+-----------+----------
Line 197:		Line 218:
	lookup |    2      |    2      |    2      |    2      |    2		lookup |    2      |    2      |    2      |    2      |    2
	readdir |  1389    |  1389    |  1961    |  1961    |  1961		readdir |  1389    |  1389    |  1961    |  1961    |  1961
		+	</pre>
-	time rm -rf /nfs/test/dir.100000 > ls.txt	+	===== time rm -rf /nfs/test/dir.100000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |  38RC    |  38NB		kernel |    36    |  36NORC  |    38    |  38RC    |  38NB
	--------+-----------+-----------+-----------+-----------+----------		--------+-----------+-----------+-----------+-----------+----------
Line 210:		Line 233:
	statfs  |    2    |    2    |    2    |    2    |    2		statfs  |    2    |    2    |    2    |    2    |    2
	readdir |    1389  |    1389  |    1961  |    1961  |    1961		readdir |    1389  |    1389  |    1961  |    1961  |    1961
		+	</pre>
		+	== 1,000,000 Files ==
-	1,000,000 Files	+	===== time ls -f --color=none /nfs/test/dir.1000000 > ls.txt =====
-	===============	+	<pre>
-		+
-	time ls -f --color=none /nfs/test/dir.1000000 > ls.txt	+
	kernel |    36    |  36NORC  |    38    |    38RC    |    38NB		kernel |    36    |  36NORC  |    38    |    38RC    |    38NB
	--------+------------+------------+------------+------------+-----------		--------+------------+------------+------------+------------+-----------
Line 228:		Line 251:
	Readdir loop		Readdir loop
	detected		detected
		+	</pre>
-	time ls -lU --color=none /nfs/test/dir.1000000 > ls.txt	+	===== time ls -lU --color=none /nfs/test/dir.1000000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |    38RC    |    38NB		kernel |    36    |  36NORC  |    38    |    38RC    |    38NB
	--------+------------+------------+------------+------------+-----------		--------+------------+------------+------------+------------+-----------
Line 241:		Line 266:
	Out of memory              Readdir loop		Out of memory              Readdir loop
	detected		detected
		+	</pre>
-	time ls -U --color=none /nfs/test/dir.1000000 > ls.txt	+	===== time ls -U --color=none /nfs/test/dir.1000000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |    38RC    |    38NB		kernel |    36    |  36NORC  |    38    |    38RC    |    38NB
	--------+------------+------------+------------+------------+-----------		--------+------------+------------+------------+------------+-----------
Line 254:		Line 281:
	Readdir loop		Readdir loop
	detected		detected
-	time rm -rf /nfs/test/dir.1000000 > ls.txt	+	</pre>
		+
		+	===== time rm -rf /nfs/test/dir.1000000 > ls.txt =====
		+	<pre>
	kernel |    36    |  36NORC  |    38    |    38RC    |    38NB		kernel |    36    |  36NORC  |    38    |    38RC    |    38NB
	--------+------------+------------+------------+------------+-----------		--------+------------+------------+------------+------------+-----------
Line 268:		Line 298:
	Out of memory Out of memory Readdir loop		Out of memory Out of memory Readdir loop
	detected		detected
-
	</pre>		</pre>

---

Latest revision as of 19:26, 4 April 2011

    36: Linux 2.6.36
36NORC: Linux 2.6.36 (without readdir cap)
    38: Linux 2.6.38
  38RC: Linux 2.6.38 (with readdir cap added back)
  38NB: Linux 2.6.38 (with Neil Brown's patch and loop detection)

Contents 1 100 Files 1.1 time ls -f --color=none /nfs/test/dir.100 > ls.txt 1.2 time ls -lU --color=none /nfs/test/dir.100 > ls.txt 1.3 time ls -U --color=none /nfs/test/dir.100 > ls.txt 1.4 time rm -rf /nfs/test/dir.100 > ls.txt 2 1,000 Files 2.1 time ls -f --color=none /nfs/test/dir.1000 > ls.txt 2.2 time ls -lU --color=none /nfs/test/dir.1000 > ls.txt 2.3 time ls -U --color=none /nfs/test/dir.1000 > ls.txt 2.4 time rm -rf /nfs/test/dir.1000 > ls.txt 3 10,000 Files 3.1 time ls -f --color=none /nfs/test/dir.10000 > ls.txt 3.2 time ls -lU --color=none /nfs/test/dir.10000 > ls.txt 3.3 time ls -U --color=none /nfs/test/dir.10000 > ls.txt 3.4 time rm -rf /nfs/test/dir.10000 > ls.txt 4 100,000 Files 4.1 time ls -f --color=none /nfs/test/dir.100000 > ls.txt 4.2 time ls -lU --color=none /nfs/test/dir.100000 > ls.txt 4.3 time ls -U --color=none /nfs/test/dir.100000 > ls.txt 4.4 time rm -rf /nfs/test/dir.100000 > ls.txt 5 1,000,000 Files 5.1 time ls -f --color=none /nfs/test/dir.1000000 > ls.txt 5.2 time ls -lU --color=none /nfs/test/dir.1000000 > ls.txt 5.3 time ls -U --color=none /nfs/test/dir.1000000 > ls.txt 5.4 time rm -rf /nfs/test/dir.1000000 > ls.txt

100 Files

time ls -f --color=none /nfs/test/dir.100 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.013s | 0m0.057s | 0m0.082s | 0m0.022s | 0m0.014s
  user  | 0m0.000s | 0m0.003s | 0m0.003s | 0m0.003s | 0m0.000s
  sys   | 0m0.007s | 0m0.007s | 0m0.060s | 0m0.013s | 0m0.010s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |    2     |    2     |    2     |    2     |    2

time ls -lU --color=none /nfs/test/dir.100 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.040s | 0m0.136s | 0m0.057s | 0m0.036s | 0m0.035s
  user  | 0m0.003s | 0m0.010s | 0m0.000s | 0m0.007s | 0m0.007s
  sys   | 0m0.010s | 0m0.020s | 0m0.017s | 0m0.027s | 0m0.027s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |   102    |   102    |   102    |   102    |   102
readdir |    2     |    2     |    2     |    2     |    2

time ls -U --color=none /nfs/test/dir.100 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.077s | 0m0.014s | 0m0.023s | 0m0.041s | 0m0.013s
  user  | 0m0.000s | 0m0.003s | 0m0.000s | 0m0.003s | 0m0.007s
  sys   | 0m0.007s | 0m0.007s | 0m0.010s | 0m0.033s | 0m0.007s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |    2     |    2     |    2     |    2     |    2

time rm -rf /nfs/test/dir.100 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.037s | 0m0.037s | 0m0.042s | 0m0.751s | 0m0.042s
  user  | 0m0.000s | 0m0.000s | 0m0.003s | 0m0.007s | 0m0.000s
  sys   | 0m0.013s | 0m0.017s | 0m0.027s | 0m0.010s | 0m0.027s
access  |    11    |    12    |    13    |    11    |    12
getattr |    1     |    1     |    1     |    1     |    1
lookup  |   102    |   102    |   102    |   102    |   102
remove  |   101    |   101    |   101    |   101    |   101
statfs  |    1     |    1     |    1     |    1     |    1
readdir |    2     |    2     |    2     |    2     |    2

1,000 Files

time ls -f --color=none /nfs/test/dir.1000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.016s | 0m0.056s | 0m0.041s | 0m0.022s | 0m0.022s
  user  | 0m0.003s | 0m0.000s | 0m0.003s | 0m0.003s | 0m0.000s
  sys   | 0m0.003s | 0m0.020s | 0m0.003s | 0m0.013s | 0m0.013s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |    13    |    13    |    20    |    20    |    20

time ls -lU --color=none /nfs/test/dir.1000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.163s | 0m0.237s | 0m0.176s | 0m0.178s | 0m0.174s
  user  | 0m0.017s | 0m0.010s | 0m0.010s | 0m0.013s | 0m0.007s
  sys   | 0m0.060s | 0m0.167s | 0m0.057s | 0m0.113s | 0m0.117s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |   1002   |   1002   |   1002   |   1002   |   1002
readdir |    12    |    13    |    20    |    20    |    20

time ls -U --color=none /nfs/test/dir.1000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.069s | 0m0.033s | 0m0.030s | 0m0.022s | 0m0.023s
  user  | 0m0.000s | 0m0.003s | 0m0.000s | 0m0.000s | 0m0.003s
  sys   | 0m0.007s | 0m0.023s | 0m0.010s | 0m0.017s | 0m0.013s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |    13    |    13    |    20    |    20    |    20

time rm -rf /nfs/test/dir.1000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.283s | 0m0.277s | 0m0.296s | 0m0.291s | 0m0.283s
  user  | 0m0.003s | 0m0.010s | 0m0.007s | 0m0.010s | 0m0.003s
  sys   | 0m0.120s | 0m0.097s | 0m0.107s | 0m0.087s | 0m0.090s
access  |    83    |    82    |    87    |    85    |    80
getattr |    1     |    1     |    1     |    1     |    1
lookup  |   1002   |   1002   |   1002   |   1002   |   1002
remove  |   1001   |   1001   |   1001   |   1001   |   1001
statfs  |    1     |    1     |    1     |    1     |    1
readdir |    13    |    13    |    20    |    20    |    20

10,000 Files

time ls -f --color=none /nfs/test/dir.10000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.232s | 0m0.318s | 0m0.160s | 0m0.148s | 0m0.155s
  user  | 0m0.007s | 0m0.000s | 0m0.003s | 0m0.003s | 0m0.003s
  sys   | 0m0.013s | 0m0.027s | 0m0.067s | 0m0.087s | 0m0.080s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |   139    |   139    |   197    |   197    |   197

time ls -lU --color=none /nfs/test/dir.10000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m2.059s | 0m1.848s | 0m1.513s | 0m1.463s | 0m1.359s
  user  | 0m0.040s | 0m0.060s | 0m0.047s | 0m0.070s | 0m0.067s
  sys   | 0m0.657s | 0m0.823s | 0m0.550s | 0m0.723s | 0m0.583s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |  10002   |  10002   |  10002   |  10002   |  10002
readdir |   139    |   139    |   197    |   197    |   197

time ls -U --color=none /nfs/test/dir.10000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m0.298s | 0m0.119s | 0m0.116s | 0m0.145s | 0m0.154s
  user  | 0m0.007s | 0m0.000s | 0m0.007s | 0m0.003s | 0m0.003s
  sys   | 0m0.017s | 0m0.053s | 0m0.013s | 0m0.110s | 0m0.117s
 access |    3     |    3     |    3     |    3     |    3
getattr |    1     |    1     |    1     |    1     |    1
 lookup |    2     |    2     |    2     |    2     |    2
readdir |   139    |   139    |   197    |   197    |   197

time rm -rf /nfs/test/dir.10000 > ls.txt

 kernel |    36    |  36NORC  |    38    |   38RC   |   38NB
--------+----------+----------+----------+----------+----------
  real  | 0m2.721s | 0m2.701s | 0m2.680s | 0m2.755s | 0m2.744s
  user  | 0m0.017s | 0m0.033s | 0m0.017s | 0m0.033s | 0m0.027s
  sys   | 0m0.833s | 0m0.837s | 0m0.843s | 0m0.850s | 0m0.927s
access  |   800    |   794    |   781    |   800    |   793
getattr |    1     |    1     |    1     |    1     |    1
lookup  |  10002   |  10002   |  10002   |  10002   |  10002
remove  |  10001   |  10001   |  10001   |  10001   |  10001
statfs  |    1     |    1     |    1     |    1     |    1
readdir |   139    |   139    |   197    |   197    |   197

100,000 Files

time ls -f --color=none /nfs/test/dir.100000 > ls.txt

 kernel |    36     |  36NORC   |    38     |   38RC    |   38NB
--------+-----------+-----------+-----------+-----------+----------
  real  | 0m2.923s  | 0m3.339s  | 0m1.085s  | 0m1.040s  | 0m1.497s
  user  | 0m0.047s  | 0m0.030s  | 0m0.043s  | 0m0.037s  | 0m0.030s
  sys   | 0m0.230s  | 0m0.263s  | 0m0.217s  | 0m0.263s  | 0m0.227s
 access |    3      |    3      |    3      |    3      |    3
getattr |    1      |    1      |    1      |    1      |    1
 lookup |    2      |    2      |    2      |    2      |    2
readdir |   1389    |   1389    |   1961    |   1961    |   1961

time ls -lU --color=none /nfs/test/dir.100000 > ls.txt

 kernel |    36     |  36NORC   |    38     |   38RC    |   38NB
--------+-----------+-----------+-----------+-----------+----------
  real  | 0m16.173s | 0m19.797s | 0m14.398s | 0m13.470s | 0m13.518s
  user  | 0m00.523s | 0m00.760s | 0m00.510s | 0m00.560s | 0m00.550s
  sys   | 0m06.670s | 0m08.053s | 0m05.923s | 0m05.413s | 0m05.340s
 access |     3     |     3     |     3     |     3     |     3
getattr |     1     |     1     |     1     |     1     |     1
 lookup |   100002  |   100002  |   100002  |   100002  |   100002
readdir |    1389   |    1389   |    1961   |    1961   |    1961

time ls -U --color=none /nfs/test/dir.100000 > ls.txt

 kernel |    36     |  36NORC   |    38     |   38RC    |   38NB
--------+-----------+-----------+-----------+-----------+----------
  real  | 0m3.585s  | 0m1.313s  | 0m0.738s  | 0m1.256s  | 0m0.806s
  user  | 0m0.033s  | 0m0.037s  | 0m0.030s  | 0m0.037s  | 0m0.033s
  sys   | 0m0.240s  | 0m0.313s  | 0m0.200s  | 0m0.290s  | 0m0.263s
 access |    3      |    3      |    3      |    3      |    3
getattr |    1      |    1      |    1      |    1      |    1
 lookup |    2      |    2      |    2      |    2      |    2
readdir |   1389    |   1389    |   1961    |   1961    |   1961

time rm -rf /nfs/test/dir.100000 > ls.txt

 kernel |    36     |  36NORC   |    38     |   38RC    |   38NB
--------+-----------+-----------+-----------+-----------+----------
  real  | 0m29.988s | 0m30.379s | 0m29.828s | 0m29.804s | 0m30.188s
  user  | 0m00.227s | 0m00.233s | 0m00.173s | 0m00.243s | 0m00.177s
  sys   | 0m08.249s | 0m08.113s | 0m08.499s | 0m09.019s | 0m08.649s
access  |    7833   |    7794   |    7903   |    7945   |    7968
getattr |     1     |     1     |     1     |     1     |     1
lookup  |   100002  |   100002  |   100002  |   100002  |   100002
remove  |   100001  |   100001  |   100001  |   100001  |   100001
statfs  |     2     |     2     |     2     |     2     |     2
readdir |    1389   |    1389   |    1961   |    1961   |    1961

1,000,000 Files

time ls -f --color=none /nfs/test/dir.1000000 > ls.txt

 kernel |     36     |   36NORC   |     38     |    38RC    |    38NB
--------+------------+------------+------------+------------+-----------
  real  | 1m13.126s  | 1m44.799s  |            |            | 0m17.438s
  user  | 0m00.413s  | 0m00.323s  |            |            | 0m00.013s
  sys   | 0m13.022s  | 0m13.666s  |  Looping   |  Looping   | 0m00.067s
 access |     3      |     3      |  readdir   |  readdir   |     3
getattr |     2      |     3      |    bug     |    bug     |     1
 lookup |     2      |     2      |            |            |     2
readdir |   13889    |   13889    |            |            |    646
                                                              Readdir loop
                                                                detected

time ls -lU --color=none /nfs/test/dir.1000000 > ls.txt

 kernel |     36     |   36NORC   |     38     |    38RC    |    38NB
--------+------------+------------+------------+------------+-----------
  real  | 4m53.270s  | 3m28.650s  | 0m29.409s  |            | 0m4.531s
  user  | 0m06.476s  | 0m06.246s  | 0m03.166s  |            | 0m0.167s
  sys   | 1m16.152s  | 1m20.161s  | 0m18.369s  | ls: memory | 0m1.850s
 access |     18     |     12     |     3      | exhausted  |    3
getattr |     1      |     2      |     4      |            |    1
 lookup |  1000002   |  1000002   |   23946    |            |  32946
readdir |   13889    |   13889    |    6600    |            |   646
                                  Out of memory               Readdir loop
                                                                detected

time ls -U --color=none /nfs/test/dir.1000000 > ls.txt

 kernel |     36     |   36NORC   |     38     |    38RC    |    38NB
--------+------------+------------+------------+------------+-----------
  real  | 2m27.713s  | 0m19.563s  |            |            | 0m0.433s
  user  | 0m00.290s  | 0m00.333s  |            |            | 0m0.017s
  sys   | 0m13.192s  | 0m13.859s  |  Looping   |  Looping   | 0m0.163s
 access |     3      |     3      |  readdir   |  readdir   |    3
getattr |     3      |     1      |    bug     |    bug     |    1
 lookup |     2      |     2      |            |            |    2
readdir |   13889    |   13889    |            |            |   646
                                                              Readdir loop
                                                                detected

time rm -rf /nfs/test/dir.1000000 > ls.txt

 kernel |     36     |   36NORC   |     38     |    38RC    |    38NB
--------+------------+------------+------------+------------+-----------
  real  | 35m48.426s | 34m05.507s | 0m17.782s  | 0m11.633s  | 1m0.290s
  user  | 00m05.040s | 00m03.333s | 0m00.973s  | 0m01.110s  | 0m0.057s
  sys   | 04m18.433s | 03m55.751s | 0m03.906s  | 0m02.696s  | 0m3.053s
access  |    112164  |    107082  |     3      |     3      |   2638
getattr |      3     |      2     |     1      |     1      |    1
lookup  |   1000004  |   1000004  |     2      |     2      |  32946
remove  |   1000001  |   1000001  |     0      |     0      |  32945
statfs  |      2     |      2     |     0      |     0      |    2
readdir |    13889   |    13889   |    1084    |    1556    |   646
                                  Out of memory Out of memory Readdir loop
                                                                detected