== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:50:02 (1787442602)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4168 s, 9.2 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-ffff99f111037000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.423005
Iter 1/10: OSS cache speed: 0.416813
Iter 1/10: ladvise speed: 0.41056
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.42905
Iter 2/10: OSS cache speed: 0.396271
Iter 2/10: ladvise speed: 0.435374
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.410777
Iter 3/10: OSS cache speed: 0.446735
Iter 3/10: ladvise speed: 0.399346
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.398313
Iter 4/10: OSS cache speed: 0.435597
Iter 4/10: ladvise speed: 0.426485
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.391316
Iter 5/10: OSS cache speed: 0.381932
Iter 5/10: ladvise speed: 0.440441
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.422731
Iter 6/10: OSS cache speed: 0.397591
Iter 6/10: ladvise speed: 0.405042
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.3725
Iter 7/10: OSS cache speed: 0.412364
Iter 7/10: ladvise speed: 0.353725
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.314844
Iter 8/10: OSS cache speed: 0.371996
Iter 8/10: ladvise speed: 0.361325
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.408625
Iter 9/10: OSS cache speed: 0.385847
Iter 9/10: ladvise speed: 0.394203
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.39843
Iter 10/10: OSS cache speed: 0.393906
Iter 10/10: ladvise speed: 0.396145
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0