== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:36:13 (1789018573)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9629 s, 7.5 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-ffff8c3a54efd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.435354
Iter 1/10: OSS cache speed: 0.433314
Iter 1/10: ladvise speed: 0.396902
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.445577
Iter 2/10: OSS cache speed: 0.445714
Iter 2/10: ladvise speed: 0.443751
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.404155
Iter 3/10: OSS cache speed: 0.473429
Iter 3/10: ladvise speed: 0.455317
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.389672
Iter 4/10: OSS cache speed: 0.425846
Iter 4/10: ladvise speed: 0.428241
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.450064
Iter 5/10: OSS cache speed: 0.350229
Iter 5/10: ladvise speed: 0.427879
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.382033
Iter 6/10: OSS cache speed: 0.394861
Iter 6/10: ladvise speed: 0.444263
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.450867
Iter 7/10: OSS cache speed: 0.453944
Iter 7/10: ladvise speed: 0.401198
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.331846
Iter 8/10: OSS cache speed: 0.391864
Iter 8/10: ladvise speed: 0.467662
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.416556
Iter 9/10: OSS cache speed: 0.43411
Iter 9/10: ladvise speed: 0.444282
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320895
Iter 10/10: OSS cache speed: 0.4346
Iter 10/10: ladvise speed: 0.39651
Average uncached read: .40
Average speedup with OSS cached read:  .42 = +5%
Average speedup with ladvise willread:  .43 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0