== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:50:17 (1743497417)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.6261 s, 5.9 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-ffff9d2062519000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.309689
Iter 1/10: OSS cache speed: 0.313858
Iter 1/10: ladvise speed: 0.353868
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.349284
Iter 2/10: OSS cache speed: 0.360372
Iter 2/10: ladvise speed: 0.330861
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.325245
Iter 3/10: OSS cache speed: 0.347706
Iter 3/10: ladvise speed: 0.357848
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.349925
Iter 4/10: OSS cache speed: 0.353622
Iter 4/10: ladvise speed: 0.352582
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353825
Iter 5/10: OSS cache speed: 0.363568
Iter 5/10: ladvise speed: 0.367386
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.353147
Iter 6/10: OSS cache speed: 0.364998
Iter 6/10: ladvise speed: 0.380448
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36195
Iter 7/10: OSS cache speed: 0.384107
Iter 7/10: ladvise speed: 0.383855
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.382011
Iter 8/10: OSS cache speed: 0.381391
Iter 8/10: ladvise speed: 0.394645
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.419689
Iter 9/10: OSS cache speed: 0.416323
Iter 9/10: ladvise speed: 0.439764
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.429144
Iter 10/10: OSS cache speed: 0.439065
Iter 10/10: ladvise speed: 0.43772
Average uncached read: .36
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