== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:25:58 (1772468758)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.89007 s, 15.2 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-ffff916507fb5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.635369
Iter 1/10: OSS cache speed: 0.726588
Iter 1/10: ladvise speed: 0.909516
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.823993
Iter 2/10: OSS cache speed: 0.963579
Iter 2/10: ladvise speed: 0.866445
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.709324
Iter 3/10: OSS cache speed: 0.666176
Iter 3/10: ladvise speed: 0.396284
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.551295
Iter 4/10: OSS cache speed: 0.36962
Iter 4/10: ladvise speed: 0.359335
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381518
Iter 5/10: OSS cache speed: 0.410808
Iter 5/10: ladvise speed: 0.40339
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.328115
Iter 6/10: OSS cache speed: 0.422632
Iter 6/10: ladvise speed: 0.365658
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.364596
Iter 7/10: OSS cache speed: 0.412654
Iter 7/10: ladvise speed: 0.392535
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.399669
Iter 8/10: OSS cache speed: 0.357356
Iter 8/10: ladvise speed: 0.400537
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.465876
Iter 9/10: OSS cache speed: 0.477908
Iter 9/10: ladvise speed: 0.434296
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.399641
Iter 10/10: OSS cache speed: 0.381578
Iter 10/10: ladvise speed: 0.397908
Average uncached read: .50
Average speedup with OSS cached read:  .51 = +2%
Average speedup with ladvise willread:  .49 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0