== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:30:08 (1784046608)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.15205 s, 11.5 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-ffff9df95156b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.396288
Iter 1/10: OSS cache speed: 0.419695
Iter 1/10: ladvise speed: 0.417073
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.401393
Iter 2/10: OSS cache speed: 0.403804
Iter 2/10: ladvise speed: 0.367902
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.36462
Iter 3/10: OSS cache speed: 0.393702
Iter 3/10: ladvise speed: 0.423211
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.420466
Iter 4/10: OSS cache speed: 0.337579
Iter 4/10: ladvise speed: 0.369278
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380352
Iter 5/10: OSS cache speed: 0.406701
Iter 5/10: ladvise speed: 0.37279
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.336027
Iter 6/10: OSS cache speed: 0.34684
Iter 6/10: ladvise speed: 0.362068
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.366328
Iter 7/10: OSS cache speed: 0.266791
Iter 7/10: ladvise speed: 0.324787
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.320379
Iter 8/10: OSS cache speed: 0.327651
Iter 8/10: ladvise speed: 0.37034
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330347
Iter 9/10: OSS cache speed: 0.313154
Iter 9/10: ladvise speed: 0.335758
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354463
Iter 10/10: OSS cache speed: 0.366697
Iter 10/10: ladvise speed: 0.373658
Average uncached read: .36
Average speedup with OSS cached read:  .35 = +-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