== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:17:57 (1787753877)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3322 s, 8.5 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-ffff8a6e45e1e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.337367
Iter 1/10: OSS cache speed: 0.27474
Iter 1/10: ladvise speed: 0.317376
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.26144
Iter 2/10: OSS cache speed: 0.295188
Iter 2/10: ladvise speed: 0.299881
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.311937
Iter 3/10: OSS cache speed: 0.358652
Iter 3/10: ladvise speed: 0.285893
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.276942
Iter 4/10: OSS cache speed: 0.299326
Iter 4/10: ladvise speed: 0.318207
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.250865
Iter 5/10: OSS cache speed: 0.274096
Iter 5/10: ladvise speed: 0.285265
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.296055
Iter 6/10: OSS cache speed: 0.286989
Iter 6/10: ladvise speed: 0.305734
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.280362
Iter 7/10: OSS cache speed: 0.283632
Iter 7/10: ladvise speed: 0.313362
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.293737
Iter 8/10: OSS cache speed: 0.290484
Iter 8/10: ladvise speed: 0.301368
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.286526
Iter 9/10: OSS cache speed: 0.292842
Iter 9/10: ladvise speed: 0.325456
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.316808
Iter 10/10: OSS cache speed: 0.274389
Iter 10/10: ladvise speed: 0.3133
Average uncached read: .29
Average speedup with OSS cached read:  .29 = +0%
Average speedup with ladvise willread:  .30 = +3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0