== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:21:44 (1790922104)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.0166 s, 9.5 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-ffff964543eba800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364945
Iter 1/10: OSS cache speed: 0.371654
Iter 1/10: ladvise speed: 0.343232
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.406983
Iter 2/10: OSS cache speed: 0.327358
Iter 2/10: ladvise speed: 0.37033
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.368593
Iter 3/10: OSS cache speed: 0.347117
Iter 3/10: ladvise speed: 0.360327
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382553
Iter 4/10: OSS cache speed: 0.374892
Iter 4/10: ladvise speed: 0.370516
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.361735
Iter 5/10: OSS cache speed: 0.387824
Iter 5/10: ladvise speed: 0.393418
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.401706
Iter 6/10: OSS cache speed: 0.400485
Iter 6/10: ladvise speed: 0.381507
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.391335
Iter 7/10: OSS cache speed: 0.38958
Iter 7/10: ladvise speed: 0.399989
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341109
Iter 8/10: OSS cache speed: 0.378066
Iter 8/10: ladvise speed: 0.323516
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.411831
Iter 9/10: OSS cache speed: 0.412893
Iter 9/10: ladvise speed: 0.419277
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.38146
Iter 10/10: OSS cache speed: 0.405911
Iter 10/10: ladvise speed: 0.38347
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0