== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:14:23 (1746130463)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.90808 s, 21.4 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-ffff88012ab0a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.72486
Iter 1/10: OSS cache speed: 0.77555
Iter 1/10: ladvise speed: 0.722128
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.675834
Iter 2/10: OSS cache speed: 0.655707
Iter 2/10: ladvise speed: 0.695006
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.688013
Iter 3/10: OSS cache speed: 0.680591
Iter 3/10: ladvise speed: 0.683036
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.672821
Iter 4/10: OSS cache speed: 0.611684
Iter 4/10: ladvise speed: 0.615098
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.620208
Iter 5/10: OSS cache speed: 0.596596
Iter 5/10: ladvise speed: 0.606784
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.64388
Iter 6/10: OSS cache speed: 0.600667
Iter 6/10: ladvise speed: 0.628636
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.63838
Iter 7/10: OSS cache speed: 0.586642
Iter 7/10: ladvise speed: 0.641291
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.649436
Iter 8/10: OSS cache speed: 0.614367
Iter 8/10: ladvise speed: 0.630457
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.618774
Iter 9/10: OSS cache speed: 0.651533
Iter 9/10: ladvise speed: 0.665761
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.669507
Iter 10/10: OSS cache speed: 0.626154
Iter 10/10: ladvise speed: 0.616598
Average uncached read: .66
Average speedup with OSS cached read:  .63 = +-4%
Average speedup with ladvise willread:  .65 = +-1%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0