== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:36:32 (1787697392)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4278 s, 9.2 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-ffff94dd52d8a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.316506
Iter 1/10: OSS cache speed: 0.360546
Iter 1/10: ladvise speed: 0.407459
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.375012
Iter 2/10: OSS cache speed: 0.464711
Iter 2/10: ladvise speed: 0.394852
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.381761
Iter 3/10: OSS cache speed: 0.386039
Iter 3/10: ladvise speed: 0.374329
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.33521
Iter 4/10: OSS cache speed: 0.396846
Iter 4/10: ladvise speed: 0.370902
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364761
Iter 5/10: OSS cache speed: 0.351871
Iter 5/10: ladvise speed: 0.394989
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394031
Iter 6/10: OSS cache speed: 0.384844
Iter 6/10: ladvise speed: 0.439129
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36484
Iter 7/10: OSS cache speed: 0.359835
Iter 7/10: ladvise speed: 0.441488
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.310919
Iter 8/10: OSS cache speed: 0.336102
Iter 8/10: ladvise speed: 0.394202
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.360876
Iter 9/10: OSS cache speed: 0.397719
Iter 9/10: ladvise speed: 0.434066
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.442573
Iter 10/10: OSS cache speed: 0.447582
Iter 10/10: ladvise speed: 0.394089
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .40 = +11%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0