== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:36:40 (1789450600)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8413 s, 8.9 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-ffff8ed7509c2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.404906
Iter 1/10: OSS cache speed: 0.398236
Iter 1/10: ladvise speed: 0.412432
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327861
Iter 2/10: OSS cache speed: 0.419244
Iter 2/10: ladvise speed: 0.420966
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.42299
Iter 3/10: OSS cache speed: 0.384218
Iter 3/10: ladvise speed: 0.269997
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.377608
Iter 4/10: OSS cache speed: 0.407768
Iter 4/10: ladvise speed: 0.391159
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.440179
Iter 5/10: OSS cache speed: 0.416497
Iter 5/10: ladvise speed: 0.40737
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379152
Iter 6/10: OSS cache speed: 0.399644
Iter 6/10: ladvise speed: 0.433437
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.37564
Iter 7/10: OSS cache speed: 0.436719
Iter 7/10: ladvise speed: 0.383035
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.425694
Iter 8/10: OSS cache speed: 0.408999
Iter 8/10: ladvise speed: 0.421407
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.395306
Iter 9/10: OSS cache speed: 0.383025
Iter 9/10: ladvise speed: 0.350047
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.412426
Iter 10/10: OSS cache speed: 0.391587
Iter 10/10: ladvise speed: 0.401354
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0