== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:29:15 (1769077755)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.5661 s, 6.0 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-ffff95b2c956b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.299245
Iter 1/10: OSS cache speed: 0.34131
Iter 1/10: ladvise speed: 0.305965
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.265998
Iter 2/10: OSS cache speed: 0.354444
Iter 2/10: ladvise speed: 0.299535
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.257417
Iter 3/10: OSS cache speed: 0.308081
Iter 3/10: ladvise speed: 0.388772
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.346293
Iter 4/10: OSS cache speed: 0.408206
Iter 4/10: ladvise speed: 0.462265
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.418275
Iter 5/10: OSS cache speed: 0.383015
Iter 5/10: ladvise speed: 0.325862
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.282267
Iter 6/10: OSS cache speed: 0.310453
Iter 6/10: ladvise speed: 0.286423
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.303855
Iter 7/10: OSS cache speed: 0.317747
Iter 7/10: ladvise speed: 0.35566
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.312017
Iter 8/10: OSS cache speed: 0.360894
Iter 8/10: ladvise speed: 0.431869
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.42651
Iter 9/10: OSS cache speed: 0.466027
Iter 9/10: ladvise speed: 0.434683
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.453488
Iter 10/10: OSS cache speed: 0.447392
Iter 10/10: ladvise speed: 0.489366
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .37 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0