== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:23:34 (1787138614)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.3531 s, 7.3 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-ffff95f142f2c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.373912
Iter 1/10: OSS cache speed: 0.31218
Iter 1/10: ladvise speed: 0.403306
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.420411
Iter 2/10: OSS cache speed: 0.345081
Iter 2/10: ladvise speed: 0.329108
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.327301
Iter 3/10: OSS cache speed: 0.35949
Iter 3/10: ladvise speed: 0.381429
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.349213
Iter 4/10: OSS cache speed: 0.354447
Iter 4/10: ladvise speed: 0.352996
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.383161
Iter 5/10: OSS cache speed: 0.42161
Iter 5/10: ladvise speed: 0.382971
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394486
Iter 6/10: OSS cache speed: 0.430085
Iter 6/10: ladvise speed: 0.39485
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.401868
Iter 7/10: OSS cache speed: 0.449782
Iter 7/10: ladvise speed: 0.410799
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.375954
Iter 8/10: OSS cache speed: 0.385355
Iter 8/10: ladvise speed: 0.398601
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370095
Iter 9/10: OSS cache speed: 0.442186
Iter 9/10: ladvise speed: 0.355695
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.343959
Iter 10/10: OSS cache speed: 0.308268
Iter 10/10: ladvise speed: 0.378886
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .37 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0