== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:18:28 (1788841108)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.3678 s, 7.3 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-ffff93f4469e8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.408266
Iter 1/10: OSS cache speed: 0.428535
Iter 1/10: ladvise speed: 0.394773
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.355809
Iter 2/10: OSS cache speed: 0.446133
Iter 2/10: ladvise speed: 0.458016
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.399017
Iter 3/10: OSS cache speed: 0.354874
Iter 3/10: ladvise speed: 0.485791
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.334055
Iter 4/10: OSS cache speed: 0.439678
Iter 4/10: ladvise speed: 0.476665
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.394123
Iter 5/10: OSS cache speed: 0.44975
Iter 5/10: ladvise speed: 0.497214
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379605
Iter 6/10: OSS cache speed: 0.389665
Iter 6/10: ladvise speed: 0.42623
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.383557
Iter 7/10: OSS cache speed: 0.482285
Iter 7/10: ladvise speed: 0.474475
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.392962
Iter 8/10: OSS cache speed: 0.41723
Iter 8/10: ladvise speed: 0.416437
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405597
Iter 9/10: OSS cache speed: 0.40002
Iter 9/10: ladvise speed: 0.431993
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.405216
Iter 10/10: OSS cache speed: 0.478761
Iter 10/10: ladvise speed: 0.487409
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .45 = +18%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0