== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:30:00 (1746127800)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.77527 s, 27.8 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-ffff8800b38f5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.732498
Iter 1/10: OSS cache speed: 0.685024
Iter 1/10: ladvise speed: 0.710746
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.697847
Iter 2/10: OSS cache speed: 0.601051
Iter 2/10: ladvise speed: 0.735508
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.907342
Iter 3/10: OSS cache speed: 0.770182
Iter 3/10: ladvise speed: 0.643646
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.559849
Iter 4/10: OSS cache speed: 0.528175
Iter 4/10: ladvise speed: 0.431561
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.478276
Iter 5/10: OSS cache speed: 0.495208
Iter 5/10: ladvise speed: 0.588655
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.553412
Iter 6/10: OSS cache speed: 0.544434
Iter 6/10: ladvise speed: 0.611046
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.638274
Iter 7/10: OSS cache speed: 0.711877
Iter 7/10: ladvise speed: 0.742281
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.790693
Iter 8/10: OSS cache speed: 0.728129
Iter 8/10: ladvise speed: 0.661989
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.708192
Iter 9/10: OSS cache speed: 0.643281
Iter 9/10: ladvise speed: 0.811971
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.847405
Iter 10/10: OSS cache speed: 0.746786
Iter 10/10: ladvise speed: 0.869797
Average uncached read: .69
Average speedup with OSS cached read:  .64 = +-7%
Average speedup with ladvise willread:  .68 = +-1%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0