== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:39:25 (1785080365)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.1211 s, 6.1 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-ffff987c88746000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.330078
Iter 1/10: OSS cache speed: 0.340385
Iter 1/10: ladvise speed: 0.346578
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.337217
Iter 2/10: OSS cache speed: 0.347568
Iter 2/10: ladvise speed: 0.33117
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.326537
Iter 3/10: OSS cache speed: 0.316852
Iter 3/10: ladvise speed: 0.309245
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.297061
Iter 4/10: OSS cache speed: 0.374012
Iter 4/10: ladvise speed: 0.319972
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.335087
Iter 5/10: OSS cache speed: 0.390062
Iter 5/10: ladvise speed: 0.369545
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.426559
Iter 6/10: OSS cache speed: 0.419691
Iter 6/10: ladvise speed: 0.427848
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.310675
Iter 7/10: OSS cache speed: 0.397128
Iter 7/10: ladvise speed: 0.345117
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.380242
Iter 8/10: OSS cache speed: 0.426325
Iter 8/10: ladvise speed: 0.347684
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.418039
Iter 9/10: OSS cache speed: 0.362531
Iter 9/10: ladvise speed: 0.348921
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320119
Iter 10/10: OSS cache speed: 0.341441
Iter 10/10: ladvise speed: 0.361763
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0