== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:29:48 (1776180588)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.21054 s, 47.4 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.629748
Iter 1/10: OSS cache speed: 0.531814
Iter 1/10: ladvise speed: 0.590597
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.516877
Iter 2/10: OSS cache speed: 0.543634
Iter 2/10: ladvise speed: 0.590988
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.559443
Iter 3/10: OSS cache speed: 0.607275
Iter 3/10: ladvise speed: 0.602115
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.592631
Iter 4/10: OSS cache speed: 0.652836
Iter 4/10: ladvise speed: 0.670799
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.690127
Iter 5/10: OSS cache speed: 0.688025
Iter 5/10: ladvise speed: 0.6627
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.645305
Iter 6/10: OSS cache speed: 0.621242
Iter 6/10: ladvise speed: 0.628558
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.6616
Iter 7/10: OSS cache speed: 0.677776
Iter 7/10: ladvise speed: 0.661372
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.666866
Iter 8/10: OSS cache speed: 0.611731
Iter 8/10: ladvise speed: 0.66125
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.613881
Iter 9/10: OSS cache speed: 0.607514
Iter 9/10: ladvise speed: 0.516841
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.541628
Iter 10/10: OSS cache speed: 0.648505
Iter 10/10: ladvise speed: 0.531884
Average uncached read: .61
Average speedup with OSS cached read:  .61 = +0%
Average speedup with ladvise willread:  .61 = +0%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21950: ��2AV: < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Unknown error 524 (524)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Unknown error 524
osd-zfs does not support dontneed or drop_caches