== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:30:55 (1788201055)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0859 s, 8.0 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-ffff9da7d27a9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.335328
Iter 1/10: OSS cache speed: 0.294077
Iter 1/10: ladvise speed: 0.375092
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.437726
Iter 2/10: OSS cache speed: 0.369475
Iter 2/10: ladvise speed: 0.403042
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.411009
Iter 3/10: OSS cache speed: 0.430887
Iter 3/10: ladvise speed: 0.462542
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.428355
Iter 4/10: OSS cache speed: 0.454232
Iter 4/10: ladvise speed: 0.439827
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.427633
Iter 5/10: OSS cache speed: 0.35567
Iter 5/10: ladvise speed: 0.351771
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.410546
Iter 6/10: OSS cache speed: 0.344
Iter 6/10: ladvise speed: 0.351858
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.357636
Iter 7/10: OSS cache speed: 0.331192
Iter 7/10: ladvise speed: 0.329356
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.344255
Iter 8/10: OSS cache speed: 0.387961
Iter 8/10: ladvise speed: 0.34002
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.358885
Iter 9/10: OSS cache speed: 0.427559
Iter 9/10: ladvise speed: 0.361203
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.454422
Iter 10/10: OSS cache speed: 0.36205
Iter 10/10: ladvise speed: 0.436207
Average uncached read: .39
Average speedup with OSS cached read:  .37 = +-5%
Average speedup with ladvise willread:  .38 = +-2%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0