== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:35:03 (1786829703)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3525 s, 9.2 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff921387ae3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.398892
Iter 1/10: OSS cache speed: 0.35899
Iter 1/10: ladvise speed: 0.438529
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384737
Iter 2/10: OSS cache speed: 0.380705
Iter 2/10: ladvise speed: 0.421095
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.374317
Iter 3/10: OSS cache speed: 0.369072
Iter 3/10: ladvise speed: 0.412126
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.280001
Iter 4/10: OSS cache speed: 0.324981
Iter 4/10: ladvise speed: 0.351095
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.427197
Iter 5/10: OSS cache speed: 0.352414
Iter 5/10: ladvise speed: 0.398984
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.414616
Iter 6/10: OSS cache speed: 0.411379
Iter 6/10: ladvise speed: 0.375435
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.401985
Iter 7/10: OSS cache speed: 0.386399
Iter 7/10: ladvise speed: 0.360897
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.445791
Iter 8/10: OSS cache speed: 0.436951
Iter 8/10: ladvise speed: 0.505042
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.447455
Iter 9/10: OSS cache speed: 0.460453
Iter 9/10: ladvise speed: 0.389375
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.405724
Iter 10/10: OSS cache speed: 0.431525
Iter 10/10: ladvise speed: 0.473687
Average uncached read: .39
Average speedup with OSS cached read:  .39 = +0%
Average speedup with ladvise willread:  .41 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0