== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:08:03 (1763341683)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.10795 s, 11.5 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-ffff8a8947965800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.400141
Iter 1/10: OSS cache speed: 0.411125
Iter 1/10: ladvise speed: 0.368455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.440378
Iter 2/10: OSS cache speed: 0.492096
Iter 2/10: ladvise speed: 0.399004
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431901
Iter 3/10: OSS cache speed: 0.408567
Iter 3/10: ladvise speed: 0.417476
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.453367
Iter 4/10: OSS cache speed: 0.440284
Iter 4/10: ladvise speed: 0.415117
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.389746
Iter 5/10: OSS cache speed: 0.382311
Iter 5/10: ladvise speed: 0.373631
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.384456
Iter 6/10: OSS cache speed: 0.373179
Iter 6/10: ladvise speed: 0.417254
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388322
Iter 7/10: OSS cache speed: 0.40842
Iter 7/10: ladvise speed: 0.353239
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.355893
Iter 8/10: OSS cache speed: 0.410624
Iter 8/10: ladvise speed: 0.416141
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.42069
Iter 9/10: OSS cache speed: 0.40126
Iter 9/10: ladvise speed: 0.402631
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.403428
Iter 10/10: OSS cache speed: 0.447151
Iter 10/10: ladvise speed: 0.47093
Average uncached read: .40
Average speedup with OSS cached read:  .41 = +2%
Average speedup with ladvise willread:  .40 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0