== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:52:57 (1775760777)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2217 s, 7.4 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-ffff9e6d080fc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.32549
Iter 1/10: OSS cache speed: 0.372268
Iter 1/10: ladvise speed: 0.39027
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.343224
Iter 2/10: OSS cache speed: 0.370167
Iter 2/10: ladvise speed: 0.365894
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.346465
Iter 3/10: OSS cache speed: 0.374772
Iter 3/10: ladvise speed: 0.361749
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.358167
Iter 4/10: OSS cache speed: 0.399666
Iter 4/10: ladvise speed: 0.367429
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353377
Iter 5/10: OSS cache speed: 0.360911
Iter 5/10: ladvise speed: 0.377077
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.327373
Iter 6/10: OSS cache speed: 0.385384
Iter 6/10: ladvise speed: 0.362631
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.342743
Iter 7/10: OSS cache speed: 0.384378
Iter 7/10: ladvise speed: 0.408568
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350402
Iter 8/10: OSS cache speed: 0.350337
Iter 8/10: ladvise speed: 0.39119
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.225268
Iter 9/10: OSS cache speed: 0.315198
Iter 9/10: ladvise speed: 0.374462
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.330223
Iter 10/10: OSS cache speed: 0.389358
Iter 10/10: ladvise speed: 0.363139
Average uncached read: .33
Average speedup with OSS cached read:  .37 = +12%
Average speedup with ladvise willread:  .37 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0