== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:25:12 (1787844312)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.4357 s, 6.8 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-ffff8d4fd1b4a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.375064
Iter 1/10: OSS cache speed: 0.515081
Iter 1/10: ladvise speed: 0.361024
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.423447
Iter 2/10: OSS cache speed: 0.383461
Iter 2/10: ladvise speed: 0.438748
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.405845
Iter 3/10: OSS cache speed: 0.339305
Iter 3/10: ladvise speed: 0.381852
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322801
Iter 4/10: OSS cache speed: 0.295766
Iter 4/10: ladvise speed: 0.420566
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.435884
Iter 5/10: OSS cache speed: 0.384355
Iter 5/10: ladvise speed: 0.43743
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.323432
Iter 6/10: OSS cache speed: 0.379438
Iter 6/10: ladvise speed: 0.444217
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.44679
Iter 7/10: OSS cache speed: 0.417431
Iter 7/10: ladvise speed: 0.377983
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.440664
Iter 8/10: OSS cache speed: 0.454678
Iter 8/10: ladvise speed: 0.451135
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.404302
Iter 9/10: OSS cache speed: 0.479168
Iter 9/10: ladvise speed: 0.36278
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.405407
Iter 10/10: OSS cache speed: 0.399718
Iter 10/10: ladvise speed: 0.378055
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .40 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0