== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:55:13 (1789120513)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2146 s, 7.4 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-ffffa0c105d35000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.31347
Iter 1/10: OSS cache speed: 0.335768
Iter 1/10: ladvise speed: 0.337071
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.363262
Iter 2/10: OSS cache speed: 0.373547
Iter 2/10: ladvise speed: 0.327091
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.349957
Iter 3/10: OSS cache speed: 0.358961
Iter 3/10: ladvise speed: 0.388971
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.380871
Iter 4/10: OSS cache speed: 0.349623
Iter 4/10: ladvise speed: 0.412812
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366878
Iter 5/10: OSS cache speed: 0.43294
Iter 5/10: ladvise speed: 0.372877
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.386614
Iter 6/10: OSS cache speed: 0.429415
Iter 6/10: ladvise speed: 0.410408
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.37531
Iter 7/10: OSS cache speed: 0.359303
Iter 7/10: ladvise speed: 0.410006
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.380279
Iter 8/10: OSS cache speed: 0.363283
Iter 8/10: ladvise speed: 0.352887
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.31265
Iter 9/10: OSS cache speed: 0.358432
Iter 9/10: ladvise speed: 0.402578
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370087
Iter 10/10: OSS cache speed: 0.434538
Iter 10/10: ladvise speed: 0.352421
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0