== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:41:59 (1788201719)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2964 s, 7.3 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-ffff9fc610081000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.404342
Iter 1/10: OSS cache speed: 0.443022
Iter 1/10: ladvise speed: 0.377206
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.382334
Iter 2/10: OSS cache speed: 0.39613
Iter 2/10: ladvise speed: 0.414164
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.371326
Iter 3/10: OSS cache speed: 0.452739
Iter 3/10: ladvise speed: 0.472654
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.373097
Iter 4/10: OSS cache speed: 0.433252
Iter 4/10: ladvise speed: 0.395353
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381308
Iter 5/10: OSS cache speed: 0.40082
Iter 5/10: ladvise speed: 0.43083
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.339989
Iter 6/10: OSS cache speed: 0.433503
Iter 6/10: ladvise speed: 0.434299
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.383532
Iter 7/10: OSS cache speed: 0.364794
Iter 7/10: ladvise speed: 0.435657
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.388838
Iter 8/10: OSS cache speed: 0.376484
Iter 8/10: ladvise speed: 0.445335
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.336561
Iter 9/10: OSS cache speed: 0.360541
Iter 9/10: ladvise speed: 0.423881
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.376458
Iter 10/10: OSS cache speed: 0.378351
Iter 10/10: ladvise speed: 0.350439
Average uncached read: .37
Average speedup with OSS cached read:  .40 = +8%
Average speedup with ladvise willread:  .41 = +10%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0