== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:32:59 (1789129979)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.6039 s, 6.7 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-ffff9d0b98180800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.286903
Iter 1/10: OSS cache speed: 0.334955
Iter 1/10: ladvise speed: 0.331876
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.31214
Iter 2/10: OSS cache speed: 0.34183
Iter 2/10: ladvise speed: 0.364187
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.325305
Iter 3/10: OSS cache speed: 0.376581
Iter 3/10: ladvise speed: 0.369878
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.352484
Iter 4/10: OSS cache speed: 0.340863
Iter 4/10: ladvise speed: 0.322313
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.284707
Iter 5/10: OSS cache speed: 0.322003
Iter 5/10: ladvise speed: 0.314145
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.352785
Iter 6/10: OSS cache speed: 0.334552
Iter 6/10: ladvise speed: 0.340798
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.333267
Iter 7/10: OSS cache speed: 0.346081
Iter 7/10: ladvise speed: 0.368033
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.325793
Iter 8/10: OSS cache speed: 0.349601
Iter 8/10: ladvise speed: 0.402827
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.400225
Iter 9/10: OSS cache speed: 0.311132
Iter 9/10: ladvise speed: 0.331123
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317672
Iter 10/10: OSS cache speed: 0.375888
Iter 10/10: ladvise speed: 0.353617
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .34 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0