== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:54:35 (1788846875)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.624 s, 9.0 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-ffff8cd2858d6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.329411
Iter 1/10: OSS cache speed: 0.350116
Iter 1/10: ladvise speed: 0.325747
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316945
Iter 2/10: OSS cache speed: 0.351077
Iter 2/10: ladvise speed: 0.360561
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.337475
Iter 3/10: OSS cache speed: 0.368827
Iter 3/10: ladvise speed: 0.332746
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.362865
Iter 4/10: OSS cache speed: 0.35447
Iter 4/10: ladvise speed: 0.353458
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.306365
Iter 5/10: OSS cache speed: 0.304916
Iter 5/10: ladvise speed: 0.305308
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.25583
Iter 6/10: OSS cache speed: 0.332807
Iter 6/10: ladvise speed: 0.32039
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.318417
Iter 7/10: OSS cache speed: 0.311366
Iter 7/10: ladvise speed: 0.340758
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.328753
Iter 8/10: OSS cache speed: 0.298059
Iter 8/10: ladvise speed: 0.29132
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.308625
Iter 9/10: OSS cache speed: 0.341392
Iter 9/10: ladvise speed: 0.329811
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.311603
Iter 10/10: OSS cache speed: 0.346251
Iter 10/10: ladvise speed: 0.32701
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .32 = +3%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0