== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:28:33 (1786760913)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5942 s, 9.0 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-ffff982cc9573000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.322087
Iter 1/10: OSS cache speed: 0.301539
Iter 1/10: ladvise speed: 0.39214
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.338532
Iter 2/10: OSS cache speed: 0.318373
Iter 2/10: ladvise speed: 0.353036
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.345152
Iter 3/10: OSS cache speed: 0.361391
Iter 3/10: ladvise speed: 0.294478
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342177
Iter 4/10: OSS cache speed: 0.347414
Iter 4/10: ladvise speed: 0.334626
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.390706
Iter 5/10: OSS cache speed: 0.360699
Iter 5/10: ladvise speed: 0.363835
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374463
Iter 6/10: OSS cache speed: 0.284144
Iter 6/10: ladvise speed: 0.345777
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.357097
Iter 7/10: OSS cache speed: 0.341948
Iter 7/10: ladvise speed: 0.332225
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.317176
Iter 8/10: OSS cache speed: 0.340086
Iter 8/10: ladvise speed: 0.327819
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331858
Iter 9/10: OSS cache speed: 0.31978
Iter 9/10: ladvise speed: 0.292646
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.319463
Iter 10/10: OSS cache speed: 0.338244
Iter 10/10: ladvise speed: 0.319298
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0