== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:48:20 (1789051700)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5246 s, 7.8 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-ffffa10086568000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.342448
Iter 1/10: OSS cache speed: 0.401946
Iter 1/10: ladvise speed: 0.396292
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.350608
Iter 2/10: OSS cache speed: 0.371833
Iter 2/10: ladvise speed: 0.427847
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.374942
Iter 3/10: OSS cache speed: 0.382341
Iter 3/10: ladvise speed: 0.361576
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.341871
Iter 4/10: OSS cache speed: 0.373189
Iter 4/10: ladvise speed: 0.394578
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.385422
Iter 5/10: OSS cache speed: 0.369467
Iter 5/10: ladvise speed: 0.318001
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.32067
Iter 6/10: OSS cache speed: 0.420407
Iter 6/10: ladvise speed: 0.46567
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.299552
Iter 7/10: OSS cache speed: 0.305365
Iter 7/10: ladvise speed: 0.390527
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.359213
Iter 8/10: OSS cache speed: 0.435458
Iter 8/10: ladvise speed: 0.450646
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.364411
Iter 9/10: OSS cache speed: 0.381551
Iter 9/10: ladvise speed: 0.316595
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.370692
Iter 10/10: OSS cache speed: 0.465314
Iter 10/10: ladvise speed: 0.328925
Average uncached read: .35
Average speedup with OSS cached read:  .39 = +11%
Average speedup with ladvise willread:  .38 = +8%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0