== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:20:43 (1787782843)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.493 s, 7.8 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-ffff8fb545978800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.331969
Iter 1/10: OSS cache speed: 0.32985
Iter 1/10: ladvise speed: 0.362787
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.368628
Iter 2/10: OSS cache speed: 0.3732
Iter 2/10: ladvise speed: 0.392721
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387384
Iter 3/10: OSS cache speed: 0.33779
Iter 3/10: ladvise speed: 0.413494
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.395335
Iter 4/10: OSS cache speed: 0.401004
Iter 4/10: ladvise speed: 0.390273
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.425721
Iter 5/10: OSS cache speed: 0.422566
Iter 5/10: ladvise speed: 0.403082
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393967
Iter 6/10: OSS cache speed: 0.357385
Iter 6/10: ladvise speed: 0.336405
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.346606
Iter 7/10: OSS cache speed: 0.355219
Iter 7/10: ladvise speed: 0.330983
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36507
Iter 8/10: OSS cache speed: 0.366611
Iter 8/10: ladvise speed: 0.385128
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.384138
Iter 9/10: OSS cache speed: 0.358933
Iter 9/10: ladvise speed: 0.367434
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.306437
Iter 10/10: OSS cache speed: 0.287841
Iter 10/10: ladvise speed: 0.394245
Average uncached read: .37
Average speedup with OSS cached read:  .35 = +-5%
Average speedup with ladvise willread:  .37 = +0%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0