== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:19:22 (1746134362)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.15905 s, 17.0 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-ffff8800b6cb3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.47124
Iter 1/10: OSS cache speed: 0.485429
Iter 1/10: ladvise speed: 0.44962
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.503811
Iter 2/10: OSS cache speed: 0.501656
Iter 2/10: ladvise speed: 0.542113
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.480107
Iter 3/10: OSS cache speed: 0.526394
Iter 3/10: ladvise speed: 0.517028
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.523768
Iter 4/10: OSS cache speed: 0.52946
Iter 4/10: ladvise speed: 0.531658
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.568548
Iter 5/10: OSS cache speed: 0.54993
Iter 5/10: ladvise speed: 0.509079
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.468105
Iter 6/10: OSS cache speed: 0.435011
Iter 6/10: ladvise speed: 0.435882
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.503718
Iter 7/10: OSS cache speed: 0.512939
Iter 7/10: ladvise speed: 0.421256
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.444882
Iter 8/10: OSS cache speed: 0.418941
Iter 8/10: ladvise speed: 0.440344
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.505516
Iter 9/10: OSS cache speed: 0.479527
Iter 9/10: ladvise speed: 0.477672
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.524025
Iter 10/10: OSS cache speed: 0.501627
Iter 10/10: ladvise speed: 0.521814
Average uncached read: .49
Average speedup with OSS cached read:  .49 = +0%
Average speedup with ladvise willread:  .48 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0