== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:20:21 (1789266021)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4022 s, 9.2 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-ffff9a4543c8f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.36826
Iter 1/10: OSS cache speed: 0.434753
Iter 1/10: ladvise speed: 0.452609
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.373447
Iter 2/10: OSS cache speed: 0.433363
Iter 2/10: ladvise speed: 0.44231
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.379608
Iter 3/10: OSS cache speed: 0.436015
Iter 3/10: ladvise speed: 0.428749
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.448229
Iter 4/10: OSS cache speed: 0.437754
Iter 4/10: ladvise speed: 0.450055
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.425712
Iter 5/10: OSS cache speed: 0.389158
Iter 5/10: ladvise speed: 0.446161
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.357075
Iter 6/10: OSS cache speed: 0.348245
Iter 6/10: ladvise speed: 0.360502
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.416767
Iter 7/10: OSS cache speed: 0.38894
Iter 7/10: ladvise speed: 0.390068
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36357
Iter 8/10: OSS cache speed: 0.401762
Iter 8/10: ladvise speed: 0.413376
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.386959
Iter 9/10: OSS cache speed: 0.354882
Iter 9/10: ladvise speed: 0.288649
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.402814
Iter 10/10: OSS cache speed: 0.411159
Iter 10/10: ladvise speed: 0.343155
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