== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:30:57 (1786566657)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.07012 s, 13.0 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-ffff9b6943444000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.48989
Iter 1/10: OSS cache speed: 0.527365
Iter 1/10: ladvise speed: 0.569487
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.554151
Iter 2/10: OSS cache speed: 0.314957
Iter 2/10: ladvise speed: 0.392301
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397925
Iter 3/10: OSS cache speed: 0.434954
Iter 3/10: ladvise speed: 0.346447
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.390056
Iter 4/10: OSS cache speed: 0.379017
Iter 4/10: ladvise speed: 0.280685
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.349596
Iter 5/10: OSS cache speed: 0.310901
Iter 5/10: ladvise speed: 0.346914
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375912
Iter 6/10: OSS cache speed: 0.356809
Iter 6/10: ladvise speed: 0.393267
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.327846
Iter 7/10: OSS cache speed: 0.337883
Iter 7/10: ladvise speed: 0.361771
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.395674
Iter 8/10: OSS cache speed: 0.384711
Iter 8/10: ladvise speed: 0.441868
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.45924
Iter 9/10: OSS cache speed: 0.492215
Iter 9/10: ladvise speed: 0.463354
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.503383
Iter 10/10: OSS cache speed: 0.469544
Iter 10/10: ladvise speed: 0.456425
Average uncached read: .42
Average speedup with OSS cached read:  .40 = +-4%
Average speedup with ladvise willread:  .40 = +-4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0