== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:33:52 (1788932032)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0349 s, 7.0 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-ffffa05553977000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.382245
Iter 1/10: OSS cache speed: 0.500681
Iter 1/10: ladvise speed: 0.395815
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.437057
Iter 2/10: OSS cache speed: 0.370649
Iter 2/10: ladvise speed: 0.452819
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431859
Iter 3/10: OSS cache speed: 0.431058
Iter 3/10: ladvise speed: 0.471933
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.307821
Iter 4/10: OSS cache speed: 0.343551
Iter 4/10: ladvise speed: 0.398026
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.39433
Iter 5/10: OSS cache speed: 0.389001
Iter 5/10: ladvise speed: 0.34969
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372185
Iter 6/10: OSS cache speed: 0.372424
Iter 6/10: ladvise speed: 0.306795
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.288497
Iter 7/10: OSS cache speed: 0.401376
Iter 7/10: ladvise speed: 0.459067
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.426078
Iter 8/10: OSS cache speed: 0.36657
Iter 8/10: ladvise speed: 0.438303
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.315029
Iter 9/10: OSS cache speed: 0.402393
Iter 9/10: ladvise speed: 0.330198
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.355192
Iter 10/10: OSS cache speed: 0.397852
Iter 10/10: ladvise speed: 0.397988
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .40 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0