== sanity test 123aa: verify statahead work ============== 13:27:05 (1776187625)
total: 100 open/close in 1.90 seconds: 52.55 ops/second
llite.lustre-ffff976646207000.statahead_max=0
101

real	0m1.593s
user	0m0.004s
sys	0m0.123s
ls -l 100 files without statahead: 2 sec
llite.lustre-ffff976646207000.statahead_max=32
32
101

real	0m0.440s
user	0m0.002s
sys	0m0.052s
ls -l 100 files with statahead: 1 sec
statahead total: 25
statahead wrong: 0
agl total: 25
 - open/close 797 (time 1776187646.89 total 10.00 last 79.67)
total: 900 open/close in 11.48 seconds: 78.42 ops/second
llite.lustre-ffff976646207000.statahead_max=0
1001

real	0m13.117s
user	0m0.034s
sys	0m1.156s
ls -l 1000 files without statahead: 13 sec
llite.lustre-ffff976646207000.statahead_max=32
32
1001

real	0m2.861s
user	0m0.020s
sys	0m0.370s
ls -l 1000 files with statahead: 2 sec
statahead total: 26
statahead wrong: 0
agl total: 26
ls -l done
rm -r /mnt/lustre/d123aa.sanity/: 7 seconds
rm done
statahead total: 26
statahead wrong: 0
agl total: 26