== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:29:52 (1779992992)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6674 s, 7.7 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-ffff8ede1a3e8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.298756
Iter 1/10: OSS cache speed: 0.32761
Iter 1/10: ladvise speed: 0.368922
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.320387
Iter 2/10: OSS cache speed: 0.350027
Iter 2/10: ladvise speed: 0.314597
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.318287
Iter 3/10: OSS cache speed: 0.325016
Iter 3/10: ladvise speed: 0.350853
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.335416
Iter 4/10: OSS cache speed: 0.367753
Iter 4/10: ladvise speed: 0.431554
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.396915
Iter 5/10: OSS cache speed: 0.369567
Iter 5/10: ladvise speed: 0.398289
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.338057
Iter 6/10: OSS cache speed: 0.390662
Iter 6/10: ladvise speed: 0.407321
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.340546
Iter 7/10: OSS cache speed: 0.422161
Iter 7/10: ladvise speed: 0.375143
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.386862
Iter 8/10: OSS cache speed: 0.36892
Iter 8/10: ladvise speed: 0.406041
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.383584
Iter 9/10: OSS cache speed: 0.37418
Iter 9/10: ladvise speed: 0.418962
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.353312
Iter 10/10: OSS cache speed: 0.410689
Iter 10/10: ladvise speed: 0.371556
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0