== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:57:33 (1775195853)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5977 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-ffff9d8d43210000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.302235
Iter 1/10: OSS cache speed: 0.308246
Iter 1/10: ladvise speed: 0.284873
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.310883
Iter 2/10: OSS cache speed: 0.310147
Iter 2/10: ladvise speed: 0.376044
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.313355
Iter 3/10: OSS cache speed: 0.354651
Iter 3/10: ladvise speed: 0.273162
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.297339
Iter 4/10: OSS cache speed: 0.398842
Iter 4/10: ladvise speed: 0.35273
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.388329
Iter 5/10: OSS cache speed: 0.332831
Iter 5/10: ladvise speed: 0.317145
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.331779
Iter 6/10: OSS cache speed: 0.36341
Iter 6/10: ladvise speed: 0.363099
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.316847
Iter 7/10: OSS cache speed: 0.319598
Iter 7/10: ladvise speed: 0.400476
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.35617
Iter 8/10: OSS cache speed: 0.386427
Iter 8/10: ladvise speed: 0.358352
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.403011
Iter 9/10: OSS cache speed: 0.388109
Iter 9/10: ladvise speed: 0.446296
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.413229
Iter 10/10: OSS cache speed: 0.41427
Iter 10/10: ladvise speed: 0.352892
Average uncached read: .34
Average speedup with OSS cached read:  .35 = +2%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0