== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:22:34 (1788920554)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8914 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-ffff9a6ecab76800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.393308
Iter 1/10: OSS cache speed: 0.350972
Iter 1/10: ladvise speed: 0.351975
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384305
Iter 2/10: OSS cache speed: 0.481435
Iter 2/10: ladvise speed: 0.555549
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.483381
Iter 3/10: OSS cache speed: 0.550316
Iter 3/10: ladvise speed: 0.531283
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.467484
Iter 4/10: OSS cache speed: 0.596097
Iter 4/10: ladvise speed: 0.62221
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.502172
Iter 5/10: OSS cache speed: 0.628791
Iter 5/10: ladvise speed: 0.338267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.409586
Iter 6/10: OSS cache speed: 0.393954
Iter 6/10: ladvise speed: 0.399684
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.33737
Iter 7/10: OSS cache speed: 0.368373
Iter 7/10: ladvise speed: 0.370052
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.353711
Iter 8/10: OSS cache speed: 0.372018
Iter 8/10: ladvise speed: 0.37423
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.372416
Iter 9/10: OSS cache speed: 0.356061
Iter 9/10: ladvise speed: 0.390423
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.318714
Iter 10/10: OSS cache speed: 0.334172
Iter 10/10: ladvise speed: 0.39842
Average uncached read: .40
Average speedup with OSS cached read:  .44 = +10%
Average speedup with ladvise willread:  .43 = +7%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0