== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:16:02 (1788794162)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.346 s, 7.3 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-ffff944f87d5a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.278559
Iter 1/10: OSS cache speed: 0.347353
Iter 1/10: ladvise speed: 0.461028
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392862
Iter 2/10: OSS cache speed: 0.325007
Iter 2/10: ladvise speed: 0.385781
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.356456
Iter 3/10: OSS cache speed: 0.338676
Iter 3/10: ladvise speed: 0.419349
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.291287
Iter 4/10: OSS cache speed: 0.340652
Iter 4/10: ladvise speed: 0.376254
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.305823
Iter 5/10: OSS cache speed: 0.381482
Iter 5/10: ladvise speed: 0.390594
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.31977
Iter 6/10: OSS cache speed: 0.36485
Iter 6/10: ladvise speed: 0.311755
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.278573
Iter 7/10: OSS cache speed: 0.326567
Iter 7/10: ladvise speed: 0.355848
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.291982
Iter 8/10: OSS cache speed: 0.299793
Iter 8/10: ladvise speed: 0.406596
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.306917
Iter 9/10: OSS cache speed: 0.319717
Iter 9/10: ladvise speed: 0.436052
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.349344
Iter 10/10: OSS cache speed: 0.339717
Iter 10/10: ladvise speed: 0.388762
Average uncached read: .31
Average speedup with OSS cached read:  .33 = +6%
Average speedup with ladvise willread:  .39 = +25%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0