== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:41:17 (1788331277)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8226 s, 8.9 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-ffff9b258893a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.416285
Iter 1/10: OSS cache speed: 0.435387
Iter 1/10: ladvise speed: 0.488202
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.36885
Iter 2/10: OSS cache speed: 0.484961
Iter 2/10: ladvise speed: 0.493263
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.359417
Iter 3/10: OSS cache speed: 0.448051
Iter 3/10: ladvise speed: 0.399782
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410826
Iter 4/10: OSS cache speed: 0.459462
Iter 4/10: ladvise speed: 0.485358
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.369145
Iter 5/10: OSS cache speed: 0.447916
Iter 5/10: ladvise speed: 0.483405
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375342
Iter 6/10: OSS cache speed: 0.44015
Iter 6/10: ladvise speed: 0.419002
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380404
Iter 7/10: OSS cache speed: 0.464138
Iter 7/10: ladvise speed: 0.499822
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.375502
Iter 8/10: OSS cache speed: 0.45159
Iter 8/10: ladvise speed: 0.433143
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.380782
Iter 9/10: OSS cache speed: 0.418819
Iter 9/10: ladvise speed: 0.432628
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.439449
Iter 10/10: OSS cache speed: 0.427628
Iter 10/10: ladvise speed: 0.411083
Average uncached read: .38
Average speedup with OSS cached read:  .44 = +15%
Average speedup with ladvise willread:  .45 = +18%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0