== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:15:19 (1787562919)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5749 s, 9.1 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-ffff9fe2c8b6b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.380342
Iter 1/10: OSS cache speed: 0.498928
Iter 1/10: ladvise speed: 0.451495
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.386591
Iter 2/10: OSS cache speed: 0.4171
Iter 2/10: ladvise speed: 0.481734
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431359
Iter 3/10: OSS cache speed: 0.47022
Iter 3/10: ladvise speed: 0.508955
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.401294
Iter 4/10: OSS cache speed: 0.386824
Iter 4/10: ladvise speed: 0.469803
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.418717
Iter 5/10: OSS cache speed: 0.462762
Iter 5/10: ladvise speed: 0.421213
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.384171
Iter 6/10: OSS cache speed: 0.443009
Iter 6/10: ladvise speed: 0.432511
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.410885
Iter 7/10: OSS cache speed: 0.45764
Iter 7/10: ladvise speed: 0.41194
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.381998
Iter 8/10: OSS cache speed: 0.438443
Iter 8/10: ladvise speed: 0.336525
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.354107
Iter 9/10: OSS cache speed: 0.466256
Iter 9/10: ladvise speed: 0.444006
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.405089
Iter 10/10: OSS cache speed: 0.455797
Iter 10/10: ladvise speed: 0.493179
Average uncached read: .39
Average speedup with OSS cached read:  .44 = +12%
Average speedup with ladvise willread:  .44 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0