== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:09:55 (1788473395)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7255 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-ffff8e0d85098800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.429283
Iter 1/10: OSS cache speed: 0.421909
Iter 1/10: ladvise speed: 0.349289
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.406461
Iter 2/10: OSS cache speed: 0.321981
Iter 2/10: ladvise speed: 0.439346
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.309103
Iter 3/10: OSS cache speed: 0.382468
Iter 3/10: ladvise speed: 0.465103
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.40501
Iter 4/10: OSS cache speed: 0.33108
Iter 4/10: ladvise speed: 0.35991
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353346
Iter 5/10: OSS cache speed: 0.353574
Iter 5/10: ladvise speed: 0.351153
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.516741
Iter 6/10: OSS cache speed: 0.482257
Iter 6/10: ladvise speed: 0.37011
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.40117
Iter 7/10: OSS cache speed: 0.463242
Iter 7/10: ladvise speed: 0.423431
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.443882
Iter 8/10: OSS cache speed: 0.492712
Iter 8/10: ladvise speed: 0.502095
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.4038
Iter 9/10: OSS cache speed: 0.401261
Iter 9/10: ladvise speed: 0.362029
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.316076
Iter 10/10: OSS cache speed: 0.420327
Iter 10/10: ladvise speed: 0.447263
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