== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:45:15 (1789123515)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8124 s, 8.9 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-ffff959ec5f1f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.413165
Iter 1/10: OSS cache speed: 0.385587
Iter 1/10: ladvise speed: 0.448628
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.496743
Iter 2/10: OSS cache speed: 0.464386
Iter 2/10: ladvise speed: 0.431404
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.469387
Iter 3/10: OSS cache speed: 0.35636
Iter 3/10: ladvise speed: 0.489588
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.452265
Iter 4/10: OSS cache speed: 0.419241
Iter 4/10: ladvise speed: 0.388578
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.39053
Iter 5/10: OSS cache speed: 0.450631
Iter 5/10: ladvise speed: 0.452372
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.380972
Iter 6/10: OSS cache speed: 0.415174
Iter 6/10: ladvise speed: 0.486458
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.423031
Iter 7/10: OSS cache speed: 0.438827
Iter 7/10: ladvise speed: 0.408928
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.406898
Iter 8/10: OSS cache speed: 0.384404
Iter 8/10: ladvise speed: 0.43481
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405587
Iter 9/10: OSS cache speed: 0.332847
Iter 9/10: ladvise speed: 0.441302
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.447065
Iter 10/10: OSS cache speed: 0.43814
Iter 10/10: ladvise speed: 0.394243
Average uncached read: .42
Average speedup with OSS cached read:  .40 = +-4%
Average speedup with ladvise willread:  .43 = +2%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0