== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:20:20 (1782487220)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.19051 s, 16.9 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-ffffa023900e2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.35603
Iter 1/10: OSS cache speed: 1.66441
Iter 1/10: ladvise speed: 1.91498
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.64453
Iter 2/10: OSS cache speed: 2.07557
Iter 2/10: ladvise speed: 2.29355
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.08919
Iter 3/10: OSS cache speed: 2.09171
Iter 3/10: ladvise speed: 0.239134
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.261923
Iter 4/10: OSS cache speed: 0.40333
Iter 4/10: ladvise speed: 0.369051
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.379303
Iter 5/10: OSS cache speed: 0.430352
Iter 5/10: ladvise speed: 0.358189
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.306879
Iter 6/10: OSS cache speed: 0.346029
Iter 6/10: ladvise speed: 0.341447
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.475776
Iter 7/10: OSS cache speed: 1.02182
Iter 7/10: ladvise speed: 2.5878
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.18645
Iter 8/10: OSS cache speed: 2.3749
Iter 8/10: ladvise speed: 0.802826
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.607067
Iter 9/10: OSS cache speed: 0.699715
Iter 9/10: ladvise speed: 0.645776
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.531765
Iter 10/10: OSS cache speed: 0.274591
Iter 10/10: ladvise speed: 0.389697
Average uncached read: .98
Average speedup with OSS cached read:  1.13 = +15%
Average speedup with ladvise willread:  .99 = +1%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0