== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:14:01 (1788596041)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2216 s, 8.6 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-ffff947d20970000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.387662
Iter 1/10: OSS cache speed: 0.432728
Iter 1/10: ladvise speed: 0.392185
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.343718
Iter 2/10: OSS cache speed: 0.390271
Iter 2/10: ladvise speed: 0.432945
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.409398
Iter 3/10: OSS cache speed: 0.4287
Iter 3/10: ladvise speed: 0.433532
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.35381
Iter 4/10: OSS cache speed: 0.349795
Iter 4/10: ladvise speed: 0.438836
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.39102
Iter 5/10: OSS cache speed: 0.405593
Iter 5/10: ladvise speed: 0.406531
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.347938
Iter 6/10: OSS cache speed: 0.349843
Iter 6/10: ladvise speed: 0.42223
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.414365
Iter 7/10: OSS cache speed: 0.402993
Iter 7/10: ladvise speed: 0.4183
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.3826
Iter 8/10: OSS cache speed: 0.338714
Iter 8/10: ladvise speed: 0.394349
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.373295
Iter 9/10: OSS cache speed: 0.343814
Iter 9/10: ladvise speed: 0.294921
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.373622
Iter 10/10: OSS cache speed: 0.394436
Iter 10/10: ladvise speed: 0.348675
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0