== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:57:18 (1788803838)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.9515 s, 8.8 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-ffff9353468b8800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.348988
Iter 1/10: OSS cache speed: 0.390969
Iter 1/10: ladvise speed: 0.350994
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.313532
Iter 2/10: OSS cache speed: 0.343509
Iter 2/10: ladvise speed: 0.371244
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.353642
Iter 3/10: OSS cache speed: 0.352295
Iter 3/10: ladvise speed: 0.38216
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.373244
Iter 4/10: OSS cache speed: 0.366849
Iter 4/10: ladvise speed: 0.341104
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.393791
Iter 5/10: OSS cache speed: 0.406264
Iter 5/10: ladvise speed: 0.390874
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.447071
Iter 6/10: OSS cache speed: 0.450175
Iter 6/10: ladvise speed: 0.423783
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.444875
Iter 7/10: OSS cache speed: 0.44506
Iter 7/10: ladvise speed: 0.465255
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.474949
Iter 8/10: OSS cache speed: 0.521494
Iter 8/10: ladvise speed: 0.488549
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.517138
Iter 9/10: OSS cache speed: 0.503314
Iter 9/10: ladvise speed: 0.494869
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.529673
Iter 10/10: OSS cache speed: 0.613195
Iter 10/10: ladvise speed: 0.723555
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0