== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:55:29 (1789120529)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4255 s, 8.4 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-ffff8bd0c52e7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.375332
Iter 1/10: OSS cache speed: 0.3906
Iter 1/10: ladvise speed: 0.423683
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.405244
Iter 2/10: OSS cache speed: 0.399806
Iter 2/10: ladvise speed: 0.400172
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.434301
Iter 3/10: OSS cache speed: 0.388352
Iter 3/10: ladvise speed: 0.395986
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392777
Iter 4/10: OSS cache speed: 0.390037
Iter 4/10: ladvise speed: 0.365145
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.414831
Iter 5/10: OSS cache speed: 0.365377
Iter 5/10: ladvise speed: 0.378237
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.315332
Iter 6/10: OSS cache speed: 0.384494
Iter 6/10: ladvise speed: 0.381224
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.38814
Iter 7/10: OSS cache speed: 0.338114
Iter 7/10: ladvise speed: 0.427219
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.377668
Iter 8/10: OSS cache speed: 0.349664
Iter 8/10: ladvise speed: 0.344981
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.360665
Iter 9/10: OSS cache speed: 0.345956
Iter 9/10: ladvise speed: 0.326519
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.41914
Iter 10/10: OSS cache speed: 0.364487
Iter 10/10: ladvise speed: 0.354811
Average uncached read: .38
Average speedup with OSS cached read:  .37 = +-2%
Average speedup with ladvise willread:  .37 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0