== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:22:43 (1761312163)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.93455 s, 54.2 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: 0.821627
Iter 1/10: OSS cache speed: 0.858948
Iter 1/10: ladvise speed: 0.816404
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.907727
Iter 2/10: OSS cache speed: 0.984586
Iter 2/10: ladvise speed: 0.893342
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.731677
Iter 3/10: OSS cache speed: 0.827173
Iter 3/10: ladvise speed: 0.951045
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.943137
Iter 4/10: OSS cache speed: 0.925079
Iter 4/10: ladvise speed: 1.03788
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.0232
Iter 5/10: OSS cache speed: 0.966846
Iter 5/10: ladvise speed: 0.899105
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.945521
Iter 6/10: OSS cache speed: 0.871203
Iter 6/10: ladvise speed: 0.968982
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.879025
Iter 7/10: OSS cache speed: 0.891715
Iter 7/10: ladvise speed: 0.818217
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.873367
Iter 8/10: OSS cache speed: 0.758239
Iter 8/10: ladvise speed: 0.845558
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.01576
Iter 9/10: OSS cache speed: 0.966991
Iter 9/10: ladvise speed: 0.993949
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.934
Iter 10/10: OSS cache speed: 0.950216
Iter 10/10: ladvise speed: 0.862322
Average uncached read: .90
Average speedup with OSS cached read:  .90 = +0%
Average speedup with ladvise willread:  .90 = +0%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871: 0ì: < 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