== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:43:56 (1787575436)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.6961 s, 6.3 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-ffff8d7ee0f24800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.319205
Iter 1/10: OSS cache speed: 0.327608
Iter 1/10: ladvise speed: 0.341045
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.311454
Iter 2/10: OSS cache speed: 0.377065
Iter 2/10: ladvise speed: 0.330716
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.351597
Iter 3/10: OSS cache speed: 0.331134
Iter 3/10: ladvise speed: 0.361898
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342975
Iter 4/10: OSS cache speed: 0.363447
Iter 4/10: ladvise speed: 0.390682
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.327974
Iter 5/10: OSS cache speed: 0.318593
Iter 5/10: ladvise speed: 0.367147
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.340843
Iter 6/10: OSS cache speed: 0.416277
Iter 6/10: ladvise speed: 0.423242
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337443
Iter 7/10: OSS cache speed: 0.327055
Iter 7/10: ladvise speed: 0.359266
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.370764
Iter 8/10: OSS cache speed: 0.380487
Iter 8/10: ladvise speed: 0.325596
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.311478
Iter 9/10: OSS cache speed: 0.298341
Iter 9/10: ladvise speed: 0.33113
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.351572
Iter 10/10: OSS cache speed: 0.344498
Iter 10/10: ladvise speed: 0.356756
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0