== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:28:01 (1784939281)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9649 s, 7.5 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-ffff9a8184071000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.323474
Iter 1/10: OSS cache speed: 0.353147
Iter 1/10: ladvise speed: 0.32329
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.332813
Iter 2/10: OSS cache speed: 0.33489
Iter 2/10: ladvise speed: 0.329886
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.315951
Iter 3/10: OSS cache speed: 0.333891
Iter 3/10: ladvise speed: 0.308473
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.33104
Iter 4/10: OSS cache speed: 0.337036
Iter 4/10: ladvise speed: 0.318679
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.326894
Iter 5/10: OSS cache speed: 0.329899
Iter 5/10: ladvise speed: 0.321838
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.31394
Iter 6/10: OSS cache speed: 0.330441
Iter 6/10: ladvise speed: 0.326639
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.339061
Iter 7/10: OSS cache speed: 0.329639
Iter 7/10: ladvise speed: 0.328967
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.338513
Iter 8/10: OSS cache speed: 0.330529
Iter 8/10: ladvise speed: 0.317027
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.315176
Iter 9/10: OSS cache speed: 0.317346
Iter 9/10: ladvise speed: 0.31979
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.312429
Iter 10/10: OSS cache speed: 0.310834
Iter 10/10: ladvise speed: 0.377573
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +3%
Average speedup with ladvise willread:  .32 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0