== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:37:36 (1787866656)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9404 s, 8.1 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-ffff9aab85faa000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.32998
Iter 1/10: OSS cache speed: 0.404135
Iter 1/10: ladvise speed: 0.395164
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.359724
Iter 2/10: OSS cache speed: 0.40738
Iter 2/10: ladvise speed: 0.378588
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.370144
Iter 3/10: OSS cache speed: 0.427873
Iter 3/10: ladvise speed: 0.391395
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355943
Iter 4/10: OSS cache speed: 0.372433
Iter 4/10: ladvise speed: 0.39465
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381294
Iter 5/10: OSS cache speed: 0.309104
Iter 5/10: ladvise speed: 0.344749
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356923
Iter 6/10: OSS cache speed: 0.382243
Iter 6/10: ladvise speed: 0.410414
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.347978
Iter 7/10: OSS cache speed: 0.377171
Iter 7/10: ladvise speed: 0.316656
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.324671
Iter 8/10: OSS cache speed: 0.358698
Iter 8/10: ladvise speed: 0.391604
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.341942
Iter 9/10: OSS cache speed: 0.42469
Iter 9/10: ladvise speed: 0.32534
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.387776
Iter 10/10: OSS cache speed: 0.43431
Iter 10/10: ladvise speed: 0.388014
Average uncached read: .35
Average speedup with OSS cached read:  .38 = +8%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0