== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:23:14 (1784758994)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2825 s, 8.5 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-ffff8e38453cf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365455
Iter 1/10: OSS cache speed: 0.38269
Iter 1/10: ladvise speed: 0.402874
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.397293
Iter 2/10: OSS cache speed: 0.347476
Iter 2/10: ladvise speed: 0.381907
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.391105
Iter 3/10: OSS cache speed: 0.394743
Iter 3/10: ladvise speed: 0.333064
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.39463
Iter 4/10: OSS cache speed: 0.364772
Iter 4/10: ladvise speed: 0.371618
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357772
Iter 5/10: OSS cache speed: 0.33586
Iter 5/10: ladvise speed: 0.329828
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.361674
Iter 6/10: OSS cache speed: 0.388379
Iter 6/10: ladvise speed: 0.388754
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.312797
Iter 7/10: OSS cache speed: 0.404866
Iter 7/10: ladvise speed: 0.374324
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.387527
Iter 8/10: OSS cache speed: 0.390723
Iter 8/10: ladvise speed: 0.413114
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357597
Iter 9/10: OSS cache speed: 0.383897
Iter 9/10: ladvise speed: 0.348793
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364301
Iter 10/10: OSS cache speed: 0.395334
Iter 10/10: ladvise speed: 0.331073
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