== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:35:48 (1790922948)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8431 s, 8.2 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-ffff904005102800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.39283
Iter 1/10: OSS cache speed: 0.440412
Iter 1/10: ladvise speed: 0.360486
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.414298
Iter 2/10: OSS cache speed: 0.395107
Iter 2/10: ladvise speed: 0.376958
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.432526
Iter 3/10: OSS cache speed: 0.405483
Iter 3/10: ladvise speed: 0.39916
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.363236
Iter 4/10: OSS cache speed: 0.453225
Iter 4/10: ladvise speed: 0.343323
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.396448
Iter 5/10: OSS cache speed: 0.343815
Iter 5/10: ladvise speed: 0.395225
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.414448
Iter 6/10: OSS cache speed: 0.418299
Iter 6/10: ladvise speed: 0.349332
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.488783
Iter 7/10: OSS cache speed: 0.378177
Iter 7/10: ladvise speed: 0.316837
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.400319
Iter 8/10: OSS cache speed: 0.40752
Iter 8/10: ladvise speed: 0.409142
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.391632
Iter 9/10: OSS cache speed: 0.337481
Iter 9/10: ladvise speed: 0.504971
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.431207
Iter 10/10: OSS cache speed: 0.433744
Iter 10/10: ladvise speed: 0.44717
Average uncached read: .41
Average speedup with OSS cached read:  .40 = +-2%
Average speedup with ladvise willread:  .39 = +-4%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0