== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:44:09 (1787885049)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5228 s, 6.8 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-ffff9908d11b5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.317121
Iter 1/10: OSS cache speed: 0.350345
Iter 1/10: ladvise speed: 0.347033
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.304876
Iter 2/10: OSS cache speed: 0.336918
Iter 2/10: ladvise speed: 0.324118
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.335705
Iter 3/10: OSS cache speed: 0.358269
Iter 3/10: ladvise speed: 0.339063
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.299154
Iter 4/10: OSS cache speed: 0.339998
Iter 4/10: ladvise speed: 0.407042
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.292182
Iter 5/10: OSS cache speed: 0.367384
Iter 5/10: ladvise speed: 0.366974
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.272689
Iter 6/10: OSS cache speed: 0.318246
Iter 6/10: ladvise speed: 0.34727
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.343213
Iter 7/10: OSS cache speed: 0.327347
Iter 7/10: ladvise speed: 0.399264
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36497
Iter 8/10: OSS cache speed: 0.42441
Iter 8/10: ladvise speed: 0.40526
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.431991
Iter 9/10: OSS cache speed: 0.452017
Iter 9/10: ladvise speed: 0.422194
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.345377
Iter 10/10: OSS cache speed: 0.395503
Iter 10/10: ladvise speed: 0.360695
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .37 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0