== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:02:10 (1787385730)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4579 s, 8.4 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-ffff8f46c887c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.33824
Iter 1/10: OSS cache speed: 0.347307
Iter 1/10: ladvise speed: 0.307996
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.305032
Iter 2/10: OSS cache speed: 0.282781
Iter 2/10: ladvise speed: 0.304308
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.327496
Iter 3/10: OSS cache speed: 0.326237
Iter 3/10: ladvise speed: 0.335308
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.309681
Iter 4/10: OSS cache speed: 0.330066
Iter 4/10: ladvise speed: 0.340815
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.330324
Iter 5/10: OSS cache speed: 0.300849
Iter 5/10: ladvise speed: 0.282336
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.254639
Iter 6/10: OSS cache speed: 0.264057
Iter 6/10: ladvise speed: 0.279539
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.291493
Iter 7/10: OSS cache speed: 0.283134
Iter 7/10: ladvise speed: 0.283005
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.258426
Iter 8/10: OSS cache speed: 0.260218
Iter 8/10: ladvise speed: 0.282095
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.282644
Iter 9/10: OSS cache speed: 0.310827
Iter 9/10: ladvise speed: 0.255458
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.26388
Iter 10/10: OSS cache speed: 0.316337
Iter 10/10: ladvise speed: 0.328115
Average uncached read: .29
Average speedup with OSS cached read:  .30 = +3%
Average speedup with ladvise willread:  .29 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0