== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:07:34 (1788872854)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4807 s, 7.2 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-ffff96694966e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.290035
Iter 1/10: OSS cache speed: 0.338164
Iter 1/10: ladvise speed: 0.394744
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.318477
Iter 2/10: OSS cache speed: 0.393808
Iter 2/10: ladvise speed: 0.338136
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387384
Iter 3/10: OSS cache speed: 0.39896
Iter 3/10: ladvise speed: 0.378587
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.397951
Iter 4/10: OSS cache speed: 0.418401
Iter 4/10: ladvise speed: 0.425392
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.401677
Iter 5/10: OSS cache speed: 0.39418
Iter 5/10: ladvise speed: 0.324018
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.366186
Iter 6/10: OSS cache speed: 0.380535
Iter 6/10: ladvise speed: 0.317158
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.367731
Iter 7/10: OSS cache speed: 0.359068
Iter 7/10: ladvise speed: 0.397128
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.281026
Iter 8/10: OSS cache speed: 0.314015
Iter 8/10: ladvise speed: 0.390868
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365345
Iter 9/10: OSS cache speed: 0.369098
Iter 9/10: ladvise speed: 0.392326
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370775
Iter 10/10: OSS cache speed: 0.412429
Iter 10/10: ladvise speed: 0.419853
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0