== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:12:44 (1789024364)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7513 s, 8.9 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-ffff90f01906b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389414
Iter 1/10: OSS cache speed: 0.391964
Iter 1/10: ladvise speed: 0.356658
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.361509
Iter 2/10: OSS cache speed: 0.321431
Iter 2/10: ladvise speed: 0.314568
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.362366
Iter 3/10: OSS cache speed: 0.339575
Iter 3/10: ladvise speed: 0.369868
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.328401
Iter 4/10: OSS cache speed: 0.269543
Iter 4/10: ladvise speed: 0.288401
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.366575
Iter 5/10: OSS cache speed: 0.304714
Iter 5/10: ladvise speed: 0.357448
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.281835
Iter 6/10: OSS cache speed: 0.312553
Iter 6/10: ladvise speed: 0.317064
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.346658
Iter 7/10: OSS cache speed: 0.339386
Iter 7/10: ladvise speed: 0.341946
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.29151
Iter 8/10: OSS cache speed: 0.321984
Iter 8/10: ladvise speed: 0.34154
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.290827
Iter 9/10: OSS cache speed: 0.348977
Iter 9/10: ladvise speed: 0.340674
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.32762
Iter 10/10: OSS cache speed: 0.281775
Iter 10/10: ladvise speed: 0.304949
Average uncached read: .33
Average speedup with OSS cached read:  .32 = +-3%
Average speedup with ladvise willread:  .33 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0