== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:47:11 (1787788031)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1647 s, 7.4 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-ffff8d3491b2e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.293113
Iter 1/10: OSS cache speed: 0.407675
Iter 1/10: ladvise speed: 0.392375
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.404512
Iter 2/10: OSS cache speed: 0.405968
Iter 2/10: ladvise speed: 0.395388
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352093
Iter 3/10: OSS cache speed: 0.400901
Iter 3/10: ladvise speed: 0.36209
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.394503
Iter 4/10: OSS cache speed: 0.399462
Iter 4/10: ladvise speed: 0.416659
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366101
Iter 5/10: OSS cache speed: 0.376925
Iter 5/10: ladvise speed: 0.390459
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.409516
Iter 6/10: OSS cache speed: 0.420095
Iter 6/10: ladvise speed: 0.359311
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.43408
Iter 7/10: OSS cache speed: 0.453002
Iter 7/10: ladvise speed: 0.439708
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.45252
Iter 8/10: OSS cache speed: 0.396494
Iter 8/10: ladvise speed: 0.427259
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.411733
Iter 9/10: OSS cache speed: 0.431015
Iter 9/10: ladvise speed: 0.450749
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.406278
Iter 10/10: OSS cache speed: 0.454086
Iter 10/10: ladvise speed: 0.420167
Average uncached read: .39
Average speedup with OSS cached read:  .41 = +5%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0