== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:31:40 (1790955100)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8284 s, 7.6 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-ffff8e7484f00800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.359475
Iter 1/10: OSS cache speed: 0.338355
Iter 1/10: ladvise speed: 0.399322
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.262344
Iter 2/10: OSS cache speed: 0.252081
Iter 2/10: ladvise speed: 0.328821
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352678
Iter 3/10: OSS cache speed: 0.321197
Iter 3/10: ladvise speed: 0.359825
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.352588
Iter 4/10: OSS cache speed: 0.362689
Iter 4/10: ladvise speed: 0.29614
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.330735
Iter 5/10: OSS cache speed: 0.440516
Iter 5/10: ladvise speed: 0.36253
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.368663
Iter 6/10: OSS cache speed: 0.317819
Iter 6/10: ladvise speed: 0.387165
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.3549
Iter 7/10: OSS cache speed: 0.280955
Iter 7/10: ladvise speed: 0.361253
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.351818
Iter 8/10: OSS cache speed: 0.450168
Iter 8/10: ladvise speed: 0.437315
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.472657
Iter 9/10: OSS cache speed: 0.554673
Iter 9/10: ladvise speed: 0.604413
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.577216
Iter 10/10: OSS cache speed: 0.581764
Iter 10/10: ladvise speed: 0.594018
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .41 = +10%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0