== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:55:26 (1739505326)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.75392 s, 27.9 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-ffff8800b608a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.92561
Iter 1/10: OSS cache speed: 0.920125
Iter 1/10: ladvise speed: 0.853698
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.79724
Iter 2/10: OSS cache speed: 0.871643
Iter 2/10: ladvise speed: 0.766335
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.795341
Iter 3/10: OSS cache speed: 0.802915
Iter 3/10: ladvise speed: 0.795501
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.973542
Iter 4/10: OSS cache speed: 0.921794
Iter 4/10: ladvise speed: 0.848068
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.954063
Iter 5/10: OSS cache speed: 0.970867
Iter 5/10: ladvise speed: 0.924442
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.911046
Iter 6/10: OSS cache speed: 0.793883
Iter 6/10: ladvise speed: 0.922858
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.891272
Iter 7/10: OSS cache speed: 0.982486
Iter 7/10: ladvise speed: 1.05765
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.913949
Iter 8/10: OSS cache speed: 0.918642
Iter 8/10: ladvise speed: 1.01066
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.987409
Iter 9/10: OSS cache speed: 1.0146
Iter 9/10: ladvise speed: 0.842032
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.854488
Iter 10/10: OSS cache speed: 0.980986
Iter 10/10: ladvise speed: 0.933512
Average uncached read: .90
Average speedup with OSS cached read:  .91 = +1%
Average speedup with ladvise willread:  .89 = +-1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0