== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:24:10 (1785453850)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0238 s, 7.5 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-ffff9e1c087a7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.352442
Iter 1/10: OSS cache speed: 0.392111
Iter 1/10: ladvise speed: 0.321935
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381404
Iter 2/10: OSS cache speed: 0.405938
Iter 2/10: ladvise speed: 0.341082
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387747
Iter 3/10: OSS cache speed: 0.353169
Iter 3/10: ladvise speed: 0.318395
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332587
Iter 4/10: OSS cache speed: 0.398254
Iter 4/10: ladvise speed: 0.377174
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.393481
Iter 5/10: OSS cache speed: 0.387395
Iter 5/10: ladvise speed: 0.367559
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.38237
Iter 6/10: OSS cache speed: 0.399434
Iter 6/10: ladvise speed: 0.380341
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.369276
Iter 7/10: OSS cache speed: 0.347096
Iter 7/10: ladvise speed: 0.356387
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372322
Iter 8/10: OSS cache speed: 0.340939
Iter 8/10: ladvise speed: 0.390842
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.337422
Iter 9/10: OSS cache speed: 0.380518
Iter 9/10: ladvise speed: 0.415865
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.372048
Iter 10/10: OSS cache speed: 0.3638
Iter 10/10: ladvise speed: 0.38825
Average uncached read: .36
Average speedup with OSS cached read:  .37 = +2%
Average speedup with ladvise willread:  .36 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0