== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:16:56 (1787699816)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5858 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-ffff9791601e6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.347452
Iter 1/10: OSS cache speed: 0.458489
Iter 1/10: ladvise speed: 0.377153
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.407523
Iter 2/10: OSS cache speed: 0.417581
Iter 2/10: ladvise speed: 0.401878
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.341506
Iter 3/10: OSS cache speed: 0.37859
Iter 3/10: ladvise speed: 0.42447
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.419087
Iter 4/10: OSS cache speed: 0.394462
Iter 4/10: ladvise speed: 0.448302
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.407692
Iter 5/10: OSS cache speed: 0.423597
Iter 5/10: ladvise speed: 0.386844
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.46327
Iter 6/10: OSS cache speed: 0.408083
Iter 6/10: ladvise speed: 0.505564
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.461493
Iter 7/10: OSS cache speed: 0.480987
Iter 7/10: ladvise speed: 0.461685
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.442338
Iter 8/10: OSS cache speed: 0.434308
Iter 8/10: ladvise speed: 0.44813
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.435059
Iter 9/10: OSS cache speed: 0.420561
Iter 9/10: ladvise speed: 0.356487
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.447203
Iter 10/10: OSS cache speed: 0.457787
Iter 10/10: ladvise speed: 0.40192
Average uncached read: .41
Average speedup with OSS cached read:  .42 = +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