== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:40:44 (1788838844)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7888 s, 8.2 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-ffff9a9c42b56000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.361507
Iter 1/10: OSS cache speed: 0.40592
Iter 1/10: ladvise speed: 0.421458
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.389734
Iter 2/10: OSS cache speed: 0.42022
Iter 2/10: ladvise speed: 0.36053
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.373639
Iter 3/10: OSS cache speed: 0.325639
Iter 3/10: ladvise speed: 0.395065
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.382118
Iter 4/10: OSS cache speed: 0.383655
Iter 4/10: ladvise speed: 0.423642
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.395377
Iter 5/10: OSS cache speed: 0.445098
Iter 5/10: ladvise speed: 0.394054
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.373003
Iter 6/10: OSS cache speed: 0.433676
Iter 6/10: ladvise speed: 0.472108
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.360125
Iter 7/10: OSS cache speed: 0.419682
Iter 7/10: ladvise speed: 0.481686
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.326165
Iter 8/10: OSS cache speed: 0.351708
Iter 8/10: ladvise speed: 0.433015
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.373512
Iter 9/10: OSS cache speed: 0.408583
Iter 9/10: ladvise speed: 0.450119
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.392349
Iter 10/10: OSS cache speed: 0.438464
Iter 10/10: ladvise speed: 0.418063
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .42 = +13%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0