== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:01:09 (1788624069)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.622 s, 7.7 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-ffff922e02ba6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.279105
Iter 1/10: OSS cache speed: 0.293957
Iter 1/10: ladvise speed: 0.291672
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.301219
Iter 2/10: OSS cache speed: 0.343633
Iter 2/10: ladvise speed: 0.333178
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.322126
Iter 3/10: OSS cache speed: 0.307249
Iter 3/10: ladvise speed: 0.281827
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.361869
Iter 4/10: OSS cache speed: 0.359844
Iter 4/10: ladvise speed: 0.36857
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.325542
Iter 5/10: OSS cache speed: 0.334638
Iter 5/10: ladvise speed: 0.33839
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379607
Iter 6/10: OSS cache speed: 0.368292
Iter 6/10: ladvise speed: 0.366473
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.348469
Iter 7/10: OSS cache speed: 0.350967
Iter 7/10: ladvise speed: 0.340957
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.345629
Iter 8/10: OSS cache speed: 0.308757
Iter 8/10: ladvise speed: 0.325771
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.394648
Iter 9/10: OSS cache speed: 0.377173
Iter 9/10: ladvise speed: 0.363823
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342509
Iter 10/10: OSS cache speed: 0.329877
Iter 10/10: ladvise speed: 0.325841
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0