== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:32:44 (1787117564)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9572 s, 7.5 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-ffff91f18842d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.382719
Iter 1/10: OSS cache speed: 0.379876
Iter 1/10: ladvise speed: 0.32706
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366001
Iter 2/10: OSS cache speed: 0.397412
Iter 2/10: ladvise speed: 0.371568
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.402222
Iter 3/10: OSS cache speed: 0.36947
Iter 3/10: ladvise speed: 0.355336
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342886
Iter 4/10: OSS cache speed: 0.401
Iter 4/10: ladvise speed: 0.392914
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.312838
Iter 5/10: OSS cache speed: 0.365848
Iter 5/10: ladvise speed: 0.302016
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.317507
Iter 6/10: OSS cache speed: 0.317153
Iter 6/10: ladvise speed: 0.35283
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.373907
Iter 7/10: OSS cache speed: 0.326429
Iter 7/10: ladvise speed: 0.421736
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.349365
Iter 8/10: OSS cache speed: 0.378366
Iter 8/10: ladvise speed: 0.313617
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.35124
Iter 9/10: OSS cache speed: 0.343871
Iter 9/10: ladvise speed: 0.379154
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381791
Iter 10/10: OSS cache speed: 0.420793
Iter 10/10: ladvise speed: 0.376181
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0