== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:28:32 (1788625712)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9966 s, 7.5 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-ffff994e86139000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.331368
Iter 1/10: OSS cache speed: 0.347583
Iter 1/10: ladvise speed: 0.356006
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.377448
Iter 2/10: OSS cache speed: 0.382159
Iter 2/10: ladvise speed: 0.363816
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.361252
Iter 3/10: OSS cache speed: 0.389174
Iter 3/10: ladvise speed: 0.357966
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338219
Iter 4/10: OSS cache speed: 0.32452
Iter 4/10: ladvise speed: 0.306973
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.347069
Iter 5/10: OSS cache speed: 0.36853
Iter 5/10: ladvise speed: 0.391488
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.44428
Iter 6/10: OSS cache speed: 0.4373
Iter 6/10: ladvise speed: 0.398059
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.356735
Iter 7/10: OSS cache speed: 0.363196
Iter 7/10: ladvise speed: 0.350725
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.389444
Iter 8/10: OSS cache speed: 0.471593
Iter 8/10: ladvise speed: 0.35105
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.352506
Iter 9/10: OSS cache speed: 0.335127
Iter 9/10: ladvise speed: 0.358449
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.325289
Iter 10/10: OSS cache speed: 0.368515
Iter 10/10: ladvise speed: 0.380697
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0