== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:33:37 (1778614417)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.2927 s, 6.9 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff91e253e8a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.401717
Iter 1/10: OSS cache speed: 0.379847
Iter 1/10: ladvise speed: 0.309675
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.309741
Iter 2/10: OSS cache speed: 0.374836
Iter 2/10: ladvise speed: 0.311563
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.323662
Iter 3/10: OSS cache speed: 0.327207
Iter 3/10: ladvise speed: 0.307031
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.327937
Iter 4/10: OSS cache speed: 0.355119
Iter 4/10: ladvise speed: 0.354727
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.329068
Iter 5/10: OSS cache speed: 0.315988
Iter 5/10: ladvise speed: 0.343225
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.357098
Iter 6/10: OSS cache speed: 0.391766
Iter 6/10: ladvise speed: 0.323665
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.365761
Iter 7/10: OSS cache speed: 0.408216
Iter 7/10: ladvise speed: 0.384395
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.356833
Iter 8/10: OSS cache speed: 0.354223
Iter 8/10: ladvise speed: 0.376943
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.342854
Iter 9/10: OSS cache speed: 0.389155
Iter 9/10: ladvise speed: 0.395641
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.376241
Iter 10/10: OSS cache speed: 0.385444
Iter 10/10: ladvise speed: 0.338227
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0