== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:50:54 (1746157854)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.78394 s, 21.9 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-ffff88012a539000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.988576
Iter 1/10: OSS cache speed: 0.87675
Iter 1/10: ladvise speed: 1.02284
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.96515
Iter 2/10: OSS cache speed: 0.948706
Iter 2/10: ladvise speed: 0.88358
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.932062
Iter 3/10: OSS cache speed: 0.888227
Iter 3/10: ladvise speed: 0.911095
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.869184
Iter 4/10: OSS cache speed: 0.941836
Iter 4/10: ladvise speed: 0.900083
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.778564
Iter 5/10: OSS cache speed: 0.917552
Iter 5/10: ladvise speed: 0.911079
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.978737
Iter 6/10: OSS cache speed: 1.08293
Iter 6/10: ladvise speed: 1.11123
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.943821
Iter 7/10: OSS cache speed: 1.01966
Iter 7/10: ladvise speed: 1.1346
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.04365
Iter 8/10: OSS cache speed: 1.02665
Iter 8/10: ladvise speed: 0.957664
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.977822
Iter 9/10: OSS cache speed: 1.08406
Iter 9/10: ladvise speed: 1.0439
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.10683
Iter 10/10: OSS cache speed: 0.982838
Iter 10/10: ladvise speed: 0.797223
Average uncached read: .95
Average speedup with OSS cached read:  .97 = +2%
Average speedup with ladvise willread:  .96 = +1%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0