== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:51:16 (1746067876)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.49901 s, 23.3 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-ffff8800b6cb1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.850538
Iter 1/10: OSS cache speed: 1.09997
Iter 1/10: ladvise speed: 1.08079
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.00752
Iter 2/10: OSS cache speed: 1.18924
Iter 2/10: ladvise speed: 1.32463
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.14054
Iter 3/10: OSS cache speed: 1.47485
Iter 3/10: ladvise speed: 1.34677
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.28732
Iter 4/10: OSS cache speed: 1.23465
Iter 4/10: ladvise speed: 1.01216
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.03638
Iter 5/10: OSS cache speed: 1.16155
Iter 5/10: ladvise speed: 1.13398
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.957048
Iter 6/10: OSS cache speed: 1.08161
Iter 6/10: ladvise speed: 0.982427
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.801075
Iter 7/10: OSS cache speed: 0.98459
Iter 7/10: ladvise speed: 0.970105
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.894064
Iter 8/10: OSS cache speed: 1.03342
Iter 8/10: ladvise speed: 1.05882
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.935702
Iter 9/10: OSS cache speed: 1.04867
Iter 9/10: ladvise speed: 1.06028
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.822516
Iter 10/10: OSS cache speed: 0.941139
Iter 10/10: ladvise speed: 0.881717
Average uncached read: .97
Average speedup with OSS cached read:  1.12 = +15%
Average speedup with ladvise willread:  1.08 = +11%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0