== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:10:28 (1787616628)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7165 s, 8.2 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-ffff9cdd217d5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.381735
Iter 1/10: OSS cache speed: 0.402287
Iter 1/10: ladvise speed: 0.35342
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.399595
Iter 2/10: OSS cache speed: 0.354226
Iter 2/10: ladvise speed: 0.375783
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.384171
Iter 3/10: OSS cache speed: 0.372499
Iter 3/10: ladvise speed: 0.321847
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390145
Iter 4/10: OSS cache speed: 0.372061
Iter 4/10: ladvise speed: 0.306974
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.355147
Iter 5/10: OSS cache speed: 0.385391
Iter 5/10: ladvise speed: 0.390538
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.425975
Iter 6/10: OSS cache speed: 0.383405
Iter 6/10: ladvise speed: 0.393187
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.397517
Iter 7/10: OSS cache speed: 0.408479
Iter 7/10: ladvise speed: 0.398667
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372377
Iter 8/10: OSS cache speed: 0.390477
Iter 8/10: ladvise speed: 0.393686
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.415571
Iter 9/10: OSS cache speed: 0.372451
Iter 9/10: ladvise speed: 0.413441
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364923
Iter 10/10: OSS cache speed: 0.413333
Iter 10/10: ladvise speed: 0.361811
Average uncached read: .38
Average speedup with OSS cached read:  .38 = +0%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0