== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:57:50 (1781229470)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.42722 s, 16.3 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-ffff8b1ac656a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.763605
Iter 1/10: OSS cache speed: 0.967717
Iter 1/10: ladvise speed: 0.893542
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.941916
Iter 2/10: OSS cache speed: 1.13253
Iter 2/10: ladvise speed: 1.01128
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.877254
Iter 3/10: OSS cache speed: 0.852546
Iter 3/10: ladvise speed: 0.994502
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.869991
Iter 4/10: OSS cache speed: 0.804613
Iter 4/10: ladvise speed: 0.799436
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.744638
Iter 5/10: OSS cache speed: 0.68552
Iter 5/10: ladvise speed: 0.756898
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.755643
Iter 6/10: OSS cache speed: 0.736692
Iter 6/10: ladvise speed: 0.789374
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.864974
Iter 7/10: OSS cache speed: 0.776743
Iter 7/10: ladvise speed: 0.892736
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.992901
Iter 8/10: OSS cache speed: 1.03001
Iter 8/10: ladvise speed: 0.824924
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.798029
Iter 9/10: OSS cache speed: 0.905694
Iter 9/10: ladvise speed: 0.809683
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.04395
Iter 10/10: OSS cache speed: 1.0317
Iter 10/10: ladvise speed: 0.750973
Average uncached read: .86
Average speedup with OSS cached read:  .89 = +3%
Average speedup with ladvise willread:  .85 = +-1%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0