== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:52:14 (1787125934)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.426 s, 9.2 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-ffff9a0c85c94800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353099
Iter 1/10: OSS cache speed: 0.308839
Iter 1/10: ladvise speed: 0.348374
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.335804
Iter 2/10: OSS cache speed: 0.305487
Iter 2/10: ladvise speed: 0.315235
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.355182
Iter 3/10: OSS cache speed: 0.39896
Iter 3/10: ladvise speed: 0.370262
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.329276
Iter 4/10: OSS cache speed: 0.381054
Iter 4/10: ladvise speed: 0.357062
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.316787
Iter 5/10: OSS cache speed: 0.348614
Iter 5/10: ladvise speed: 0.356081
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.334215
Iter 6/10: OSS cache speed: 0.362029
Iter 6/10: ladvise speed: 0.32914
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.340532
Iter 7/10: OSS cache speed: 0.365083
Iter 7/10: ladvise speed: 0.378523
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.309878
Iter 8/10: OSS cache speed: 0.341212
Iter 8/10: ladvise speed: 0.374591
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.356231
Iter 9/10: OSS cache speed: 0.354146
Iter 9/10: ladvise speed: 0.362967
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.348531
Iter 10/10: OSS cache speed: 0.386889
Iter 10/10: ladvise speed: 0.375626
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0