== sanity test 123aa: verify statahead work ============== 14:48:31 (1776192511)
total: 100 open/close in 1.87 seconds: 53.35 ops/second
llite.lustre-ffff929c10844000.statahead_max=0
101

real	0m1.283s
user	0m0.006s
sys	0m0.129s
ls -l 100 files without statahead: 1 sec
llite.lustre-ffff929c10844000.statahead_max=32
32
101

real	0m0.409s
user	0m0.004s
sys	0m0.054s
ls -l 100 files with statahead: 0 sec
statahead total: 25
statahead wrong: 0
agl total: 25
 - open/close 640 (time 1776192532.87 total 10.00 last 63.99)
total: 900 open/close in 13.87 seconds: 64.90 ops/second
llite.lustre-ffff929c10844000.statahead_max=0
1001

real	0m14.067s
user	0m0.026s
sys	0m1.083s
ls -l 1000 files without statahead: 14 sec
llite.lustre-ffff929c10844000.statahead_max=32
32
1001

real	0m3.101s
user	0m0.022s
sys	0m0.361s
ls -l 1000 files with statahead: 4 sec
statahead total: 26
statahead wrong: 0
agl total: 26
ls -l done
rm -r /mnt/lustre/d123aa.sanity/: 11 seconds
rm done
statahead total: 26
statahead wrong: 0
agl total: 26