== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:23:05 (1790922185)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4403 s, 7.8 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-ffff943fc8a65800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.383973
Iter 1/10: OSS cache speed: 0.41075
Iter 1/10: ladvise speed: 0.384452
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.416482
Iter 2/10: OSS cache speed: 0.367156
Iter 2/10: ladvise speed: 0.442301
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.388726
Iter 3/10: OSS cache speed: 0.396449
Iter 3/10: ladvise speed: 0.380505
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.379772
Iter 4/10: OSS cache speed: 0.373421
Iter 4/10: ladvise speed: 0.350152
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359698
Iter 5/10: OSS cache speed: 0.369656
Iter 5/10: ladvise speed: 0.384226
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.441808
Iter 6/10: OSS cache speed: 0.353049
Iter 6/10: ladvise speed: 0.409283
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.404812
Iter 7/10: OSS cache speed: 0.408603
Iter 7/10: ladvise speed: 0.420434
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.416256
Iter 8/10: OSS cache speed: 0.388778
Iter 8/10: ladvise speed: 0.36051
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.398829
Iter 9/10: OSS cache speed: 0.423353
Iter 9/10: ladvise speed: 0.389203
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.359835
Iter 10/10: OSS cache speed: 0.362071
Iter 10/10: ladvise speed: 0.422557
Average uncached read: .39
Average speedup with OSS cached read:  .38 = +-2%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0