== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:47:32 (1788972452)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.89068 s, 10.6 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-ffff8c1c91782800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.373347
Iter 1/10: OSS cache speed: 0.36207
Iter 1/10: ladvise speed: 0.373403
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.385246
Iter 2/10: OSS cache speed: 0.436902
Iter 2/10: ladvise speed: 0.390043
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.319259
Iter 3/10: OSS cache speed: 0.360849
Iter 3/10: ladvise speed: 0.386443
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355825
Iter 4/10: OSS cache speed: 0.379741
Iter 4/10: ladvise speed: 0.314514
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.350846
Iter 5/10: OSS cache speed: 0.346472
Iter 5/10: ladvise speed: 0.329834
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355022
Iter 6/10: OSS cache speed: 0.409345
Iter 6/10: ladvise speed: 0.437485
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.426982
Iter 7/10: OSS cache speed: 0.407261
Iter 7/10: ladvise speed: 0.425288
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.367996
Iter 8/10: OSS cache speed: 0.454477
Iter 8/10: ladvise speed: 0.423806
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.406097
Iter 9/10: OSS cache speed: 0.470064
Iter 9/10: ladvise speed: 0.417084
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.374828
Iter 10/10: OSS cache speed: 0.397908
Iter 10/10: ladvise speed: 0.436984
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0