== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:40:02 (1790782802)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5458 s, 6.7 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-ffff91bfc33a2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.275144
Iter 1/10: OSS cache speed: 0.31366
Iter 1/10: ladvise speed: 0.366649
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.328056
Iter 2/10: OSS cache speed: 0.317493
Iter 2/10: ladvise speed: 0.351521
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.316469
Iter 3/10: OSS cache speed: 0.300363
Iter 3/10: ladvise speed: 0.349435
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.289751
Iter 4/10: OSS cache speed: 0.351835
Iter 4/10: ladvise speed: 0.330085
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.330726
Iter 5/10: OSS cache speed: 0.364212
Iter 5/10: ladvise speed: 0.395692
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.33113
Iter 6/10: OSS cache speed: 0.364256
Iter 6/10: ladvise speed: 0.377565
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.324009
Iter 7/10: OSS cache speed: 0.338044
Iter 7/10: ladvise speed: 0.378456
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.333617
Iter 8/10: OSS cache speed: 0.409098
Iter 8/10: ladvise speed: 0.336482
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.322045
Iter 9/10: OSS cache speed: 0.363222
Iter 9/10: ladvise speed: 0.426639
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.358322
Iter 10/10: OSS cache speed: 0.387317
Iter 10/10: ladvise speed: 0.38286
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0