== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:52:47 (1787302367)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0678 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-ffff8a9a46253000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368862
Iter 1/10: OSS cache speed: 0.432636
Iter 1/10: ladvise speed: 0.454134
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.390214
Iter 2/10: OSS cache speed: 0.36798
Iter 2/10: ladvise speed: 0.429601
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.381845
Iter 3/10: OSS cache speed: 0.366501
Iter 3/10: ladvise speed: 0.423523
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.407905
Iter 4/10: OSS cache speed: 0.330925
Iter 4/10: ladvise speed: 0.376844
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.424549
Iter 5/10: OSS cache speed: 0.448523
Iter 5/10: ladvise speed: 0.408235
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.43522
Iter 6/10: OSS cache speed: 0.318303
Iter 6/10: ladvise speed: 0.416856
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.460693
Iter 7/10: OSS cache speed: 0.448696
Iter 7/10: ladvise speed: 0.445105
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.394918
Iter 8/10: OSS cache speed: 0.453486
Iter 8/10: ladvise speed: 0.455988
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.44176
Iter 9/10: OSS cache speed: 0.453583
Iter 9/10: ladvise speed: 0.372415
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.428755
Iter 10/10: OSS cache speed: 0.429384
Iter 10/10: ladvise speed: 0.424964
Average uncached read: .41
Average speedup with OSS cached read:  .40 = +-2%
Average speedup with ladvise willread:  .42 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0