== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:43:51 (1786409031)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0418 s, 8.7 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-ffff93c4860b3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.333223
Iter 1/10: OSS cache speed: 0.362565
Iter 1/10: ladvise speed: 0.449673
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.449929
Iter 2/10: OSS cache speed: 0.473675
Iter 2/10: ladvise speed: 0.458728
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.441687
Iter 3/10: OSS cache speed: 0.404853
Iter 3/10: ladvise speed: 0.26073
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.343421
Iter 4/10: OSS cache speed: 0.406702
Iter 4/10: ladvise speed: 0.448426
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.436005
Iter 5/10: OSS cache speed: 0.360351
Iter 5/10: ladvise speed: 0.451487
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.411877
Iter 6/10: OSS cache speed: 0.435554
Iter 6/10: ladvise speed: 0.355991
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.42816
Iter 7/10: OSS cache speed: 0.384973
Iter 7/10: ladvise speed: 0.390846
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.412636
Iter 8/10: OSS cache speed: 0.42215
Iter 8/10: ladvise speed: 0.479597
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.406432
Iter 9/10: OSS cache speed: 0.441782
Iter 9/10: ladvise speed: 0.453729
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.375978
Iter 10/10: OSS cache speed: 0.448594
Iter 10/10: ladvise speed: 0.471517
Average uncached read: .40
Average speedup with OSS cached read:  .41 = +2%
Average speedup with ladvise willread:  .42 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0