== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:21:18 (1788654078)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5716 s, 8.3 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-ffff893f44054000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.319653
Iter 1/10: OSS cache speed: 0.35137
Iter 1/10: ladvise speed: 0.365018
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.35529
Iter 2/10: OSS cache speed: 0.370594
Iter 2/10: ladvise speed: 0.353619
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.339153
Iter 3/10: OSS cache speed: 0.34136
Iter 3/10: ladvise speed: 0.341065
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.345551
Iter 4/10: OSS cache speed: 0.343657
Iter 4/10: ladvise speed: 0.392621
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.409135
Iter 5/10: OSS cache speed: 0.389761
Iter 5/10: ladvise speed: 0.38283
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.382863
Iter 6/10: OSS cache speed: 0.343563
Iter 6/10: ladvise speed: 0.369954
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.382701
Iter 7/10: OSS cache speed: 0.374388
Iter 7/10: ladvise speed: 0.376486
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350824
Iter 8/10: OSS cache speed: 0.369739
Iter 8/10: ladvise speed: 0.38689
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.319796
Iter 9/10: OSS cache speed: 0.274512
Iter 9/10: ladvise speed: 0.367878
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.359245
Iter 10/10: OSS cache speed: 0.389695
Iter 10/10: ladvise speed: 0.367964
Average uncached read: .35
Average speedup with OSS cached read:  .35 = +0%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0